Carburetor, Muffler & Blower Housing Torque Specs
Head bolts and flywheel nuts get all the attention, but the fasteners you actually strip are the small ones: the carburetor studs you back off to clean a bowl, the sheet-metal screws holding the blower housing, the muffler nuts that shear because nobody torqued them. This page… Read the rest ›
pulls every published service-hardware figure out of the Honda, Kohler, Kawasaki, Briggs & Stratton, Stihl, Husqvarna and Echo manuals and sorts them by component instead of by engine — so you can compare what seven manufacturers say about the same joint, and find a defensible number when your own manual is silent. The handheld 2-stroke rows are worth reading against the 4-stroke ones: they show how far apart the same-sounding fastener can be, and a figure borrowed across that gap is the most common way one of these joints gets ruined.
Where these numbers come from. 179 published figures, 11 confirmed gaps, every source named. How we checked ›
Nothing here is a new number. Every row is the same object rendered on the engine-specific page it came from, carrying its original manufacturer PDF as its source — Kohler service forms 17/20/24/32 690 xx, the Kawasaki FR/FS/FX/FH/FJ manuals, Honda's GX reference sheets, the Briggs Vanguard tables, the Stihl dealer service manuals, Husqvarna's 435-450 workshop manuals and Echo's first-party service and operator manuals. Where a manufacturer publishes no value, the row says so rather than borrowing one from another brand.
Carburetor fuel bowl & float chamber Manufacturer-published
The screw at the bottom of the bowl. More about this engine ›
It threads into thin cast alloy and is the single most-stripped fastener on a small engine — the values below are why "just snug it" ruins carburetors.
| Fastener | Torque | Where it comes from |
|---|---|---|
| Kohler Courage SV470-SV620 — carburetor fuel bowl screw, Walbro | 45–55 in-lbHigh | 5.1-6.2 N·m, as printed by Kohler. This is the most-stripped fastener on the engine — the low end of the band is the number to aim at, not the high one. |
| Kohler Courage SV470-SV620 — carburetor fuel bowl screw, Nikki | 96–113 in-lbHigh | 10.8-12.8 N·m, as printed by Kohler. Nikki-equipped carbs torque noticeably higher than Walbro on this platform — check your carb brand before assuming a value. |
| Kohler Command CH11-16 (Horizontal Crankshaft) — carburetor fuel bowl nut | 45–55 in-lbHigh | 5.1-6.2 N·m, as printed by Kohler. |
| Kohler Command CV11-16 (Vertical Crankshaft, incl. CV460-465/CV490-495) — carburetor fuel bowl retaining screw | 45–55 in-lbHigh | 5.1-6.2 N·m, as printed by Kohler. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — carburetor fuel bowl screw | 22 in-lb≈ 1.8 ft-lbHigh | 2.5 N·m ± 0.3 (22 in. lb. ± 3 in. lb.) -- form 62 690 01 Rev. O, p.14. Why ›The CV manual states the same metric tolerance as a slightly different English figure; see the CV engine below. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — carburetor fuel bowl screw | 22 in-lb≈ 1.8 ft-lbHigh | 2.5 N·m ± 0.3 (22 in. lb. ± 2.3 in. lb.) -- form 62 690 02 Rev. N, p.6. Why ›The CH manual states the same 2.5 N·m ± 0.3 but rounds its English tolerance to "3 in. lb." instead; same metric spec, different printed English rounding. |
| Kawasaki FJ180V — carburetor float chamber mounting bolt | 48 in-lb= 4 ft-lbHigh | 5.4 N-m (0.55 kgf-m). |
Carburetor mounting studs, screws & nuts Manufacturer-published
What holds the carb to the intake. More about this engine ›
Over-torquing here crushes the insulator block and gasket, which causes the lean-run/surging that sends people back to buy another carburetor they did not need.
| Fastener | Torque | Where it comes from |
|---|---|---|
| Kohler Command PRO CH395 — carburetor mounting stud | 7.4 ft-lbHigh | 10 N·m (89 in-lb). Primary nut on the stud torques to 8 N·m (71 in-lb / 5.9 ft-lb). |
| Kohler Command CH620-CH750 V-Twin (CH640, CH680, CH730, CH740) — carburetor mounting screw (M6)M6 | 55–65 in-lbHigh | 6.2-7.3 N·m. Kohler prints this as a band in in-lb; both ends are shown rather than the upper bound alone. |
| Kohler Command CV620-CV750 V-Twin (CV640, CV680, CV730, CV740) — carburetor mounting nut (M6)M6 | 55–65 in-lbHigh | 6.2-7.3 N·m, as printed by Kohler. Called "Mounting Nut" in the CV manual vs "Mounting Screw" in the CH manual. |
| Kohler 7000 Series (KT715-KT745) — carburetor mounting nut | 55–65 in-lbHigh | 6.2-7.3 N·m, as printed by Kohler. |
| Kohler Command CH11-16 (Horizontal Crankshaft) — carburetor adapter and heat deflector capscrews | 88 in-lb≈ 7.3 ft-lbHigh | 9.9 N·m. "Install the heat deflector, carburetor adapter, and gaskets to the cylinder head intake port with the two allen head capscrews. Why ›Torque the screws to 9.9 N·m (88 in. lb.)." TP-2402-A p.11.12. |
| Kohler Command CH11-16 (Horizontal Crankshaft) — carburetor throttle plate retaining screws | 8–12 in-lbHigh | 0.9-1.4 N·m. Carburetor rebuild fastener, not a carb-to-engine mounting screw: "Install the throttle plate to the throttle shaft... Why ›Apply Loctite No. 609 to the threads of the throttle plate retaining screws... Torque the screws to 0.9-1.4 N·m (8-12 in. lb.)." No numeric torque is printed for the choke plate screws in the same procedure. TP-2402-A §5 ("Fuel System and Governor," Throttle Shaft Installation). |
| Kohler Classic Magnum M8 — carburetor bowl retaining screw | 50 in-lb≈ 4.2 ft-lbHigh | 50 in. lb. (p.1.9). |
| Kohler Classic Magnum M10 / M12 / M14 / M16 — carburetor bowl retaining screw | 50 in-lb≈ 4.2 ft-lbHigh | 50 in. lb. (p.1.9), same figure as M8. |
| Kohler Classic Magnum M18 / M20 (twin) — carburetor bowl retaining screw | 50 in-lb≈ 4.2 ft-lbHigh | 50 in. lb. (p.1.6), same figure as M8-M16. |
| Kohler XT-6 / XT-7 (all models) — carburetor stud fastener | 71 in-lb≈ 5.9 ft-lbHigh | 8 N·m (71 in. lb.) -- form 14 690 01 Rev. G, p.5. |
| Kohler XT-6 / XT-7 (all models) — auto-choke arm assembly screws to carburetor (if equipped) | 20 in-lb≈ 1.7 ft-lbHigh | 2.3 N·m (20 in. lb.) -- form 14 690 01 Rev. G, p.54, reassembly step. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — carburetor / air cleaner mounting nut | 100 in-lb≈ 8.3 ft-lbHigh | 11.3 N·m (100 in. lb.) -- form 62 690 01 Rev. O, p.14. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — carburetor / air cleaner mounting nut | 100 in-lb≈ 8.3 ft-lbHigh | 11.3 N·m (100 in. lb.) -- form 62 690 02 Rev. N, p.6. |
| Kawasaki FR651V / FR691V / FR730V / FS651V / FS691V / FS730V / FX651V / FX691V / FX730V — carburetor and inlet pipe mounting bolt/nut | 52 in-lb≈ 4.3 ft-lbHigh | 5.9 N-m (0.60 kgf-m). |
| Kawasaki FX801V / FX850V — carburetor and inlet pipe mounting bolt/nut | 52 in-lb≈ 4.3 ft-lbHigh | 5.9 N-m (0.60 kgf-m). |
| Stihl MS 210 / MS 230 / MS 250 — filter housing / carburetorM5 collar locknut | 24 in-lb= 2 ft-lbHigh | 2.7 N·m. |
| Tecumseh HM / HMSK Snow King & Medium Frame (L-Head Horizontal) — carburetor to intake pipe | 70 in-lb≈ 5.8 ft-lbHigh | ≈5.8 ft-lb (the manual rounds this to 6 ft-lb). Why ›This 70 in-lb figure is the same across every L-head family and the OHV manual (p.86) — one of the few Tecumseh specs that does not vary by column. |
| Tecumseh HSSK / HS Snow King (L-Head Horizontal, Small Frame) — carburetor to intake pipe | 70 in-lb≈ 5.8 ft-lbHigh | ≈5.8 ft-lb. Same universal figure as every other L-head family and the OHV manual, p.86/91. |
| Tecumseh VM / TVM / TVXL 170-220 (L-Head Vertical) — carburetor to intake pipe | 70 in-lb≈ 5.8 ft-lbHigh | ≈5.8 ft-lb. Same universal figure as every other L-head family and the OHV manual, p.86. |
| Tecumseh OHV — OHH, OHSK, OVRM, OVM, OVXL, OHV11-17 — carburetor to intake pipe | 70 in-lb≈ 5.8 ft-lbHigh | ≈5.8 ft-lb. Same universal figure as the L-head manual, p.86. |
| Tecumseh 2-Cycle — AH520/AH600, AV520/AV600, HSK600, TVS600 — carburetor mounting nuts | 60–75 in-lbHigh | ≈5-6.25 ft-lb. |
| LCT 79cc — carburetor mounting studs | 71–106 in-lbHigh | LCT prints 8-12 N·m (71-106 in-lbs.) in the service manual's "79cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 79cc — carburetor mounting nut (summer/winter) | 62 in-lb≈ 5.2 ft-lbHigh | LCT prints 7 N·m (62 in-lbs.) in the service manual's "79cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 136cc — carburetor mounting studs | 71–106 in-lbHigh | LCT prints 8-12 N·m (71-106 in-lbs.) in the service manual's "136cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 136cc — carburetor mounting nut (summer/winter) | 62 in-lb≈ 5.2 ft-lbHigh | LCT prints 7 N·m (62 in-lbs.) in the service manual's "136cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 179cc — carburetor mounting studs | 71–106 in-lbHigh | LCT prints 8-12 N·m (71-106 in-lbs.) in the service manual's "179cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 179cc — carburetor mounting nut (summer/winter) | 62 in-lb≈ 5.2 ft-lbHigh | LCT prints 7 N·m (62 in-lbs.) in the service manual's "179cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 208cc / 223cc — carburetor mounting studs | 71–106 in-lbHigh | LCT prints 8-12 N·m (71-106 in-lbs.) in the service manual's "208cc / 223cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 208cc / 223cc — carburetor mounting nut (summer/winter) | 62 in-lb≈ 5.2 ft-lbHigh | LCT prints 7 N·m (62 in-lbs.) in the service manual's "208cc / 223cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 254cc — carburetor mounting studs | 71–106 in-lbHigh | LCT prints 8-12 N·m (71-106 in-lbs.) in the service manual's "254cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 254cc — carburetor mounting nut (summer/winter) | 62 in-lb≈ 5.2 ft-lbHigh | LCT prints 7 N·m (62 in-lbs.) in the service manual's "254cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 291cc — carburetor mounting studs | 71–106 in-lbHigh | LCT prints 8-12 N·m (71-106 in-lbs.) in the service manual's "291cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 291cc — carburetor mounting nut (summer/winter) | 71 in-lb≈ 5.9 ft-lbHigh | LCT prints 8 N·m (71 in-lbs.) in the service manual's "291cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 306cc — carburetor mounting studs | 71–106 in-lbHigh | LCT prints 8-12 N·m (71-106 in-lbs.) in the service manual's "306cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 306cc — carburetor mounting nut (summer/winter) | 71 in-lb≈ 5.9 ft-lbHigh | LCT prints 8 N·m (71 in-lbs.) in the service manual's "306cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 369cc — carburetor mounting studs | 71–106 in-lbHigh | LCT prints 8-12 N·m (71-106 in-lbs.) in the service manual's "369cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 369cc — carburetor mounting nut (summer/winter) | 71 in-lb≈ 5.9 ft-lbHigh | LCT prints 8 N·m (71 in-lbs.) in the service manual's "369cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 414cc — carburetor mounting studs | 71–106 in-lbHigh | LCT prints 8-12 N·m (71-106 in-lbs.) in the service manual's "414cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 414cc — carburetor mounting nut (summer/winter) | 71 in-lb≈ 5.9 ft-lbHigh | LCT prints 8 N·m (71 in-lbs.) in the service manual's "414cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 420cc — carburetor mounting studs | 71–106 in-lbHigh | LCT prints 8-12 N·m (71-106 in-lbs.) in the service manual's "420cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 420cc — carburetor mounting nut (summer/winter) | 71 in-lb≈ 5.9 ft-lbHigh | LCT prints 8 N·m (71 in-lbs.) in the service manual's "420cc Torque (N.M)" column (PGM45015 rev I, p.14). |
2 specs not published — Kohler Command CH11-16 (Horizontal Crankshaft) — carburetor mounting screw, Kohler Command CV11-16 (Vertical Crankshaft, incl. CV460-465/CV490-495) — carburetor mounting screw What we found ›
- Kohler Command CH11-16 (Horizontal Crankshaft) — carburetor mounting screwGAP: the carburetor itself has no printed mounting torque in TP-2402-A — only the fuel bowl nut (see that row) is torqued on the carb body. The heat-deflector/carburetor-adapter capscrews that mount the carb assembly to the cylinder head intake port DO have a published figure — see "carburetor adapter and heat deflector capscrews" below.
- Kohler Command CV11-16 (Vertical Crankshaft, incl. CV460-465/CV490-495) — carburetor mounting screwGAP: TP-2339-D does not print a distinct carburetor-mounting-screw torque for CV11-16 — only the fuel bowl retaining screw (see that row) is torqued.
Intake manifold & inlet pipe Manufacturer-published
The manifold between carburetor and head. A loose one is the classic hunting/surging air leak; an over-torqued one warps the flange and creates the same symptom.
| Fastener | Torque | Where it comes from |
|---|---|---|
| Briggs & Stratton Vanguard OHV V-Twin — intake manifold | 140 in-lb≈ 11.7 ft-lbHigh | 16.0 N-m equivalent. |
| Kohler Command CH620-CH750 V-Twin (CH640, CH680, CH730, CH740) — intake manifold mounting fastener (2-stage) | 7.3 ft-lbHigh | Final 9.9 N·m (88 in-lb); initial 7.4 N·m (66 in-lb). |
| Kohler Command CV620-CV750 V-Twin (CV640, CV680, CV730, CV740) — intake manifold mounting fastener (2-stage) | 7.3 ft-lbHigh | Final 9.9 N·m (88 in-lb); initial 7.4 N·m (66 in-lb). |
| Kohler 7000 Series (KT715-KT745) — intake manifold mounting fastener (2-stage) | 7.3 ft-lbHigh | Final 9.9 N·m (88 in-lb); initial 7.4 N·m (66 in-lb). |
| Kohler Classic Magnum M8 — fuel inlet seat | 35 in-lb≈ 2.9 ft-lbHigh | 35 in. lb. (p.1.9). |
| Kohler Classic Magnum M10 / M12 / M14 / M16 — fuel inlet seat | 35 in-lb≈ 2.9 ft-lbHigh | 35 in. lb. (p.1.9), same figure as M8. |
| Kohler Classic Magnum M18 / M20 (twin) — fuel inlet seat | 35 in-lb≈ 2.9 ft-lbHigh | 35 in. lb. (p.1.6), same figure as M8-M16. |
| Kohler Classic Magnum M18 / M20 (twin) — intake and exhaust manifold fastener | 150 in-lb≈ 12.5 ft-lbHigh | 150 in. lb. (p.1.7) -- this component doesn't exist on the single-cylinder M8-M16 Magnums (no separate manifold; the carburetor mounts… Why ›directly) -- do not borrow this figure for those engines. Confirmed at the exhaust elbow in reassembly (p.11.18): "Torque screws to 150 in. lb." |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — intake manifold mounting fastener (torque in 2 increments) | 200 in-lb≈ 16.7 ft-lbHigh | Torqued in 2 stages: final 200 in. lb. Why ›(22.6 N·m); initial 150 in. lb. (16.9 N·m). Sequence printed on p.79 of the manual (not reproduced here) -- form 62 690 01 Rev. O, p.14. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — air cleaner mounting screw (into intake manifold) | 100 in-lb≈ 8.3 ft-lbHigh | 11.3 N·m (100 in. lb.) -- form 62 690 01 Rev. O, p.14. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — control bracket mounting screw (into intake manifold from air cleaner) | 90 in-lb≈ 7.5 ft-lbHigh | 10.2 N·m (90 in. lb.) -- form 62 690 01 Rev. O, p.14. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — intake manifold mounting fastener (torque in 2 increments) | 200 in-lb≈ 16.7 ft-lbHigh | Torqued in 2 stages: final 200 in. lb. Why ›(22.6 N·m); initial 150 in. lb. (16.9 N·m). Sequence printed on p.64 of the manual (not reproduced here) -- form 62 690 02 Rev. N, p.6. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — air cleaner mounting screw (into intake manifold) | 100 in-lb≈ 8.3 ft-lbHigh | 11.3 N·m (100 in. lb.) -- form 62 690 02 Rev. N, p.6. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — control bracket mounting screw (into intake manifold from air cleaner) | 90 in-lb≈ 7.5 ft-lbHigh | 10.2 N·m (90 in. lb.) -- form 62 690 02 Rev. N, p.6. |
| Kawasaki FR651V / FR691V / FR730V / FS651V / FS691V / FS730V / FX651V / FX691V / FX730V — inlet manifold mounting bolt | 52 in-lb≈ 4.3 ft-lbHigh | 5.9 N-m (0.60 kgf-m). Sequence torque (remarks code "S"). |
| Kawasaki FR541V / FR600V / FS481V / FS541V / FS600V / FX600V — control panel / intake pipe mounting bolt | 52 in-lb≈ 4.3 ft-lbHigh | 5.9 N-m (0.60 kgf-m). |
| Kawasaki FR541V / FR600V / FS481V / FS541V / FS600V / FX600V — intake manifold mounting bolt (FR models) | 78 in-lb≈ 6.5 ft-lbHigh | 8.8 N-m (0.90 kgf-m). Sequence torque (remarks code "S"). Why ›FR541V/FR600V use a different intake-manifold bolt torque than the FS/FX models sharing this manual -- see next row. |
| Kawasaki FR541V / FR600V / FS481V / FS541V / FS600V / FX600V — intake manifold mounting bolt (FS and FX models) | 52 in-lb≈ 4.3 ft-lbHigh | 5.9 N-m (0.60 kgf-m). Sequence torque (remarks code "S"). |
| Tecumseh HM / HMSK Snow King & Medium Frame (L-Head Horizontal) — intake pipe to cylinder | 120 in-lb= 10 ft-lbHigh | ≈10 ft-lb. HMSK/HMXL/HM column, p.91. |
| Tecumseh HSSK / HS Snow King (L-Head Horizontal, Small Frame) — intake pipe to cylinder | 95 in-lb≈ 7.9 ft-lbHigh | ≈7.9 ft-lb. "HSSK HS" column, p.91 — lower than the 120 in-lb HMSK/HM figure. |
| Tecumseh VM / TVM / TVXL 170-220 (L-Head Vertical) — intake pipe to cylinder | 110 in-lb≈ 9.2 ft-lbHigh | ≈9.2 ft-lb. "VM TVM&TVXL170,195,220" column, p.91 — lower than the 120 in-lb figure ticked for the HMSK/HM column; do not cross-apply between the two. |
| Tecumseh OHV — OHH, OHSK, OVRM, OVM, OVXL, OHV11-17 — intake pipe to head (all OHV columns) | 115 in-lb≈ 9.6 ft-lbHigh | ≈9.6 ft-lb. p.86 — ticked across all six torque-table columns, including OVRM and OHH50-65/OHSK50-70. |
| Onan P216 / P218 / P220 — intake manifold mounting screws | 6–10 ft-lbHigh | 8-14 N·m. Assembly Torques Table 1, p.4-1 — a much lighter range than the P224's 20-23 ft-lb; do not cross-apply. |
| Onan P224 — intake manifold mounting screws | 20–23 ft-lbHigh | 27-31 N·m. Assembly Torques Table 1, p.4-1 — a much heavier range than the P216/P218/P220's 6-10 ft-lb; do not cross-apply. |
Valve clearance — feeler gauge, not a wrenchValve clearance — set with a feeler gauge, not a wrench
- Kohler Classic K91 — valve/tappet clearance (cold), intake: Not a torque spec -- .005"/.009" cold, per Figure 1-5 (p.1.6), cross-confirmed pp.3.8 and 12.13.
- Kohler Classic K161 / K181 (incl. K141) — valve/tappet clearance (cold), intake: Not a torque spec -- .006"/.008" cold (Figure 1-5, p.1.6) -- tighter than K91's .005"/.009".
- Kohler Classic K241 / K301 / K321 — valve/tappet clearance (cold), intake: Not a torque spec -- .008"/.010" cold (Figure 1-5, p.1.6).
- Kohler Classic K341 — valve/tappet clearance (cold), intake: Not a torque spec -- .008"/.010" cold (Figure 1-5, p.1.6), same as K241/K301/K321.
Blower housing & sheet metal screws Manufacturer-published
The recoil/shroud screws you remove to reach anything else. More about this engine ›
Most thread directly into aluminium bosses, which is why several manuals publish a lower figure for a hole that has already been used once.
| Fastener | Torque | Where it comes from |
|---|---|---|
| Kohler Command PRO CH395 — blower housing / sheet metal screwM6 | 7.4 ft-lbHigh | 10 N·m (89 in-lb). |
| Kohler Command PRO CH440 — blower housing / sheet metal screwM6 | 7.4 ft-lbHigh | 10 N·m (89 in-lb). |
| Kohler 7000 Series (KT715-KT745) — blower housing / sheet metal M6 fastenerM6 | 7.9 ft-lbHigh | 10.7 N·m (95 in-lb) into a new hole; 7.3 N·m (65 in-lb / 5.4 ft-lb) into a used hole. |
| Kohler Courage SV470-SV620 — blower housing / sheet metal M6 fastenerM6 | 8.3 ft-lbHigh | 11.6 N·m (99 in-lb) into a new hole; 7.7 N·m (68 in-lb / 5.7 ft-lb) into a used hole. |
| Kohler Classic K241 / K301 / K321 — oil pan, sheet metal | 200 in-lb≈ 16.7 ft-lbHigh | 200 in. lb. (Figure 1-6, p.1.7) -- a sheet-metal oil pan option specific to the K241-341 group; K91 and K161/K181 print a dash for this row. Why ›Footnote 4: "Torque twice with minimum of one minute interval." |
| Kohler Classic K341 — oil pan, sheet metal | 200 in-lb≈ 16.7 ft-lbHigh | 200 in. lb. (Figure 1-6, p.1.7). Footnote 4: "Torque twice with minimum of one minute interval." |
| Kohler XT-6 / XT-7 (all models) — blower housing stud | 88 in-lb≈ 7.3 ft-lbHigh | 10 N·m (88 in. lb.) -- form 14 690 01 Rev. G, p.5. |
| Kohler XT-6 / XT-7 (all models) — blower housing nut | 70 in-lb≈ 5.8 ft-lbHigh | 8 N·m (70 in. lb.) -- form 14 690 01 Rev. G, p.5. Why ›Printed as "70 in. lb." here even though every other 8 N·m row on this page reads "71 in. lb."; reproduced as Kohler printed it, not corrected. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — blower housing / sheet metal M6 screw, new untapped hole (casting)M6 | 95 in-lb≈ 7.9 ft-lbHigh | 10.7 N·m (95 in. lb.) -- form 62 690 01 Rev. O, p.14. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — blower housing / sheet metal M6 screw, used tapped hole (casting)M6 | 65 in-lb≈ 5.4 ft-lbHigh | 7.3 N·m (65 in. lb.) -- form 62 690 01 Rev. O, p.14. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — blower housing / sheet metal M6 screw, new extruded hole (sheet metal)M6 | 22 in-lb≈ 1.8 ft-lbHigh | 2.5 N·m (22 in. lb.) -- form 62 690 01 Rev. O, p.14. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — blower housing / sheet metal M6 screw, used extruded hole (sheet metal)M6 | 18 in-lb≈ 1.5 ft-lbHigh | 2.0 N·m (18 in. lb.) -- form 62 690 01 Rev. O, p.14. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — blower housing / sheet metal M6 screw, mounting clip (valley baffle)M6 | 22 in-lb≈ 1.8 ft-lbHigh | 2.5 N·m (22 in. lb.) -- form 62 690 01 Rev. O, p.14. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — blower housing / sheet metal M6 screw, new untapped hole (casting)M6 | 95 in-lb≈ 7.9 ft-lbHigh | 10.7 N·m (95 in. lb.) -- form 62 690 02 Rev. N, p.6. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — blower housing / sheet metal M6 screw, used tapped hole (casting)M6 | 65 in-lb≈ 5.4 ft-lbHigh | 7.3 N·m (65 in. lb.) -- form 62 690 02 Rev. N, p.6. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — blower housing / sheet metal M6 screw, new extruded hole (sheet metal)M6 | 22 in-lb≈ 1.8 ft-lbHigh | 2.5 N·m (22 in. lb.) -- form 62 690 02 Rev. N, p.6. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — blower housing / sheet metal M6 screw, used extruded hole (sheet metal)M6 | 18 in-lb≈ 1.5 ft-lbHigh | 2.0 N·m (18 in. lb.) -- form 62 690 02 Rev. N, p.6. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — blower housing / sheet metal M6 screw, mounting clip (valley baffle)M6 | 22 in-lb≈ 1.8 ft-lbHigh | 2.5 N·m (22 in. lb.) -- form 62 690 02 Rev. N, p.6. |
| LCT 79cc — blower housing mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "79cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 79cc — sheet metal mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "79cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 136cc — blower housing mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "136cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 136cc — sheet metal mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "136cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 179cc — blower housing mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "179cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 179cc — sheet metal mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "179cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 208cc / 223cc — blower housing mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "208cc / 223cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 208cc / 223cc — sheet metal mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "208cc / 223cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 254cc — blower housing mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "254cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 254cc — sheet metal mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "254cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 291cc — blower housing mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "291cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 291cc — sheet metal mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "291cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 306cc — blower housing mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "306cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 306cc — sheet metal mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "306cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 369cc — blower housing mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "369cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 369cc — sheet metal mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "369cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 414cc — blower housing mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "414cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 414cc — sheet metal mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "414cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 420cc — blower housing mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "420cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 420cc — sheet metal mounting bolts | 52–86 in-lbHigh | LCT prints 6-10 N·m (52-86 in-lbs.) in the service manual's "420cc Torque (N.M)" column (PGM45015 rev I, p.14). |
4 specs not published — Kohler Command CH11-16 (Horizontal Crankshaft) — blower housing / sheet metal fastener, Kohler Command CV11-16 (Vertical Crankshaft, incl. CV460-465/CV490-495) — blower housing / sheet metal fastener, Onan P216 / P218 / P220 — blower housing, Onan P224 — blower housing What we found ›
- Kohler Command CH11-16 (Horizontal Crankshaft) — blower housing / sheet metal fastenerGAP: the blower-housing screws themselves have no printed figure — TP-2402-A says only "tighten securely." The cylinder head baffle screws that mount to the same area DO have a published torque — see that row above.
- Kohler Command CV11-16 (Vertical Crankshaft, incl. CV460-465/CV490-495) — blower housing / sheet metal fastenerGAP: no distinct blower-housing fastener torque is printed in TP-2339-D for this family (same gap as CH11-16).
- Onan P216 / P218 / P220 — blower housingGAP: the blower housing is referenced only as an assembly step in the Service Manual, never given its own torque value.
- Onan P224 — blower housingGAP: the blower housing is referenced only as an assembly step in the Service Manual, never given its own torque value.
Muffler & exhaust hardware Manufacturer-published
Heat-cycled and usually rusted, and the ones most likely to shear on removal. More about this engine ›
Read the unit column carefully here: the 4-stroke M8 muffler nuts are an 18 ft-lb job, while the handheld 2-stroke rows below them are in-lb — Stihl's spark-arresting screen is 9 in-lb, about a hundredth of the figure a few rows up. Nowhere on this site do two fasteners with such similar names sit so far apart.
| Fastener | Torque | Where it comes from |
|---|---|---|
| Honda GX160 — muffler nutM8x1.25 | 18 ft-lbHigh | 24 N-m / 2.4 kgf-m. |
| Briggs & Stratton Vanguard OHV V-Twin — exhaust manifold | 150 in-lb≈ 12.5 ft-lbHigh | 17.0 N-m equivalent. |
| Kohler Command PRO CH440 — muffler exhaust screwM10 | 25.8 ft-lbHigh | 35 N·m (310 in-lb), M10. |
| Kohler Command CH620-CH750 V-Twin (CH640, CH680, CH730, CH740) — muffler M8 hex nutsM8 | 18 ft-lbHigh | 24.4 N·m (216 in-lb). Lock-nut variant torques higher, to 27.8 N·m (246 in-lb / 20.5 ft-lb). |
| Kohler Command CV620-CV750 V-Twin (CV640, CV680, CV730, CV740) — muffler retaining nuts | 18 ft-lbHigh | 24.4 N·m (216 in-lb). The CV manual gives one undifferentiated value; unlike the CH manual it does not separately list a lock-nut variant… Why ›thread size (M8) is also not stated here, unlike the CH manual's explicit M8 callout. |
| Kohler 7000 Series (KT715-KT745) — muffler M8 hex nutsM8 | 18 ft-lbHigh | 24.4 N·m (216 in-lb). Lock-nut variant 27.8 N·m (246 in-lb / 20.5 ft-lb); 5/16-18 capscrew variant 16.9 N·m (150 in-lb / 12.5 ft-lb)… Why ›depending on cylinder-head design. |
| Kohler Courage SV470-SV620 — muffler retaining nuts | 18 ft-lbHigh | 24.4 N·m (216 in-lb). Bracket screw torques lower, to 7.5 N·m (65 in-lb / 5.4 ft-lb). |
| Kohler Command CH11-16 (Horizontal Crankshaft) — muffler retaining nuts | 216 in-lb= 18 ft-lbHigh | 24.4 N·m, as printed by Kohler. |
| Kohler Command CH11-16 (Horizontal Crankshaft) — muffler-to-bracket mounting screws | 88 in-lb≈ 7.3 ft-lbHigh | 9.9 N·m. "Secure the muffler to the upper and lower mounting brackets with the hex flange screws. Why ›Torque the screws to 9.9 N·m (88 in. lb.)." A different fastener from the muffler retaining nuts row above (216 in-lb, the exhaust-port stud nuts). TP-2402-A p.11.18. |
| Kohler Command CV11-16 (Vertical Crankshaft, incl. CV460-465/CV490-495) — muffler retaining nuts | 216 in-lb= 18 ft-lbHigh | 24.4 N·m, as printed by Kohler — same as CH11-16. |
| Kohler XT-6 / XT-7 (all models) — muffler exhaust stud | 44 in-lb≈ 3.7 ft-lbHigh | 5.0 N·m (44 in. lb.) -- form 14 690 01 Rev. G, p.6. |
| Kohler XT-6 / XT-7 (all models) — muffler exhaust stud nut fastener | 84 in-lb= 7 ft-lbHigh | 9.5 N·m (84 in. lb.) -- form 14 690 01 Rev. G, p.6. |
| Kohler XT-6 / XT-7 (all models) — auto-choke arm assembly nuts to muffler (if equipped) | 75 in-lb≈ 6.3 ft-lbHigh | 8.5 N·m (75 in. lb.) -- form 14 690 01 Rev. G, p.54, reassembly step. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — muffler retaining nut | 216 in-lb= 18 ft-lbHigh | 24.4 N·m (216 in. lb.) -- form 62 690 01 Rev. O, p.15. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — muffler M6 screwM6 | 88 in-lb≈ 7.3 ft-lbHigh | 9.9 N·m (88 in. lb.) -- form 62 690 01 Rev. O, p.15. |
| Kohler Command PRO CH940-CH1000 (horizontal shaft) — muffler M8 screwM8 | 216 in-lb= 18 ft-lbHigh | 24.4 N·m (216 in. lb.) -- form 62 690 01 Rev. O, p.15. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — muffler retaining nut | 216 in-lb= 18 ft-lbHigh | 24.4 N·m (216 in. lb.) -- form 62 690 02 Rev. N, p.7. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — muffler screw, intermittent bracket (into weld nut) | 120 in-lb= 10 ft-lbHigh | 13.6 N·m (120 in. lb.). CV-only fastener -- not a table row in the CH manual. form 62 690 02 Rev. N, p.7. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — muffler M6 screwM6 | 88 in-lb≈ 7.3 ft-lbHigh | 9.9 N·m (88 in. lb.) -- form 62 690 02 Rev. N, p.7. |
| Kohler Command PRO CV940-CV1000 (vertical shaft) — muffler M8 screwM8 | 216 in-lb= 18 ft-lbHigh | 24.4 N·m (216 in. lb.) -- form 62 690 02 Rev. N, p.7. |
| Kawasaki FJ180V — muffler cover self-tap bolt | 61 in-lb≈ 5.1 ft-lbHigh | 6.9 N-m (0.70 kgf-m). |
| Kawasaki FH580V — exhaust pipe flange nut (muffler mount) | 11 ft-lbHigh | 15 N-m (1.5 kgf-m). |
| Kawasaki FH601V / FH680V — exhaust pipe flange nut (muffler mount) | 11 ft-lbHigh | 15 N-m (1.5 kgf-m). |
| Stihl MS 210 / MS 230 / MS 250 — mufflerM5 collar locknut | 71 in-lb≈ 5.9 ft-lbHigh | 8 N·m. |
| Stihl MS 261 / MS 261 C — muffler to crankcaseM5x16 | 89 in-lb≈ 7.4 ft-lbHigh | 10.0 N·m. |
| Stihl MS 261 / MS 261 C — muffler to cylinderM5x16 | 89 in-lb≈ 7.4 ft-lbHigh | 10.0 N·m. |
| Stihl MS 261 / MS 261 C — spark arresting screen to mufflerM4x9.6 | 9 in-lb≈ 0.8 ft-lbHigh | 1.0 N·m. The lowest figure on the saw — this is a screwdriver-feel fastener, and no ft-lb wrench will read it. |
| Stihl MS 271 C / MS 291 C — muffler to cylinderD5x18 | 80 in-lb≈ 6.7 ft-lbHigh | 9.0 N·m. |
| Stihl FS 45 trimmer — stub to mufflerM14x1.25 | 11 ft-lbHigh | 15.0 N·m, printed by Stihl as 11.0 lbf-ft. Install with sealant. |
| Stihl FS 45 trimmer — muffler to cylinderIS-DG5x60 spline | 80 in-lb≈ 6.7 ft-lbHigh | 9.0 N·m, printed by Stihl as 6.6 lbf-ft. |
| Husqvarna 435 / 435e / 440e — muffler bolt, initial | 71–89 in-lbHigh | 8-10 N·m. This is a two-stage spec — see the retighten row below; stopping at this figure is not the finished job. |
| Husqvarna 435 / 435e / 440e — muffler bolt, retighten after run-in | 106–124 in-lbHigh | 12-14 N·m, applied after running the saw for about a minute so the joint has heat-cycled once. |
| Husqvarna 445 / 445e / 450e — muffler bolt, initial | 71–89 in-lbHigh | 8-10 N·m. Two-stage spec — see the retighten row. |
| Husqvarna 445 / 445e / 450e — muffler bolt, retighten after run-in | 106–124 in-lbHigh | 12-14 N·m, after about a minute of running. |
| Echo SRM-2620ES / SRM-2620TES — mufflerM5 | 62–97 in-lbHigh | 7-11 N·m (70-110 kgf-cm). |
| Echo SRM-2620ES / SRM-2620TES — muffler cover, crankcase sideM5 | 27–40 in-lbHigh | 3-4.5 N·m (30-45 kgf-cm). Note this differs from the starter-side cover screw below — Echo gives the two sides different figures. |
| Echo SRM-2620ES / SRM-2620TES — muffler cover, starter sideM5 | 22–31 in-lbHigh | 2.5-3.5 N·m (25-35 kgf-cm). The lowest figure in the table. |
| Echo CS-400 — muffler mounting bolt / nut | 70–95 in-lbHigh | 8-11 N·m. Two-stage: tighten cold, then re-tighten after the saw has warmed up. |
| Echo SRM-225 trimmer — muffler mounting bolt / nut | 80–95 in-lbHigh | 90-110 kgf-cm as printed, which converts to 9.0-10.7 N·m. Two-stage: tighten, run, re-tighten. |
| Tecumseh HM / HMSK Snow King & Medium Frame (L-Head Horizontal) — muffler mounting | 120 in-lb= 10 ft-lbHigh | ≈10 ft-lb. HMSK/HMXL/HM column, p.92. |
| Tecumseh HM / HMSK Snow King & Medium Frame (L-Head Horizontal) — muffler mounting, flanged | 80 in-lb≈ 6.7 ft-lbHigh | ≈6.7 ft-lb. HMSK/HMXL/HM column, p.92 — a separate figure from the standard muffler mounting row above for a flanged-style muffler. |
| Tecumseh HM / HMSK Snow King & Medium Frame (L-Head Horizontal) — muffler mounting, shoulder bolt | 110 in-lb≈ 9.2 ft-lbHigh | ≈9.2 ft-lb. HMSK/HMXL/HM column, p.92 — the only column ticked for this row. |
| Tecumseh HSSK / HS Snow King (L-Head Horizontal, Small Frame) — muffler mounting, lock tabs | 72.5 in-lb≈ 6.0 ft-lbHigh | ≈6 ft-lb. "HSSK HS" column, p.92. |
| Tecumseh HSSK / HS Snow King (L-Head Horizontal, Small Frame) — muffler mounting, flanged | 80 in-lb≈ 6.7 ft-lbHigh | ≈6.7 ft-lb. "HSSK HS" column, p.92. |
| Tecumseh VM / TVM / TVXL 170-220 (L-Head Vertical) — muffler mounting | 120 in-lb= 10 ft-lbHigh | ≈10 ft-lb. "VM TVM&TVXL170,195,220" column, p.92. |
| Tecumseh OHV — OHH, OHSK, OVRM, OVM, OVXL, OHV11-17 — muffler mounting, flanged to manifold (OVXL/OHM/OVM/OHSK80-130 & OHV110-135 columns) | 200 in-lb≈ 16.7 ft-lbHigh | ≈16.7 ft-lb. p.86 — ticked for the "OVXL,OHM,OVM,&OHSK" and "OHV110-135/206" columns; a much heavier muffler joint than anything on the L-head manual. |
| Tecumseh 2-Cycle — AH520/AH600, AV520/AV600, HSK600, TVS600 — muffler mounting screws | 80–100 in-lbHigh | ≈6.7-8.3 ft-lb. |
| Onan P216 / P218 / P220 — exhaust manifold mounting screws | 9–11 ft-lbHigh | 12-15 N·m. Assembly Torques Table 1, p.4-1 — same figure on the P224. |
| Onan P224 — exhaust manifold mounting screws | 9–11 ft-lbHigh | 12-15 N·m. Assembly Torques Table 1, p.4-1 — same figure on the P216/P218/P220. |
| LCT 79cc — muffler mounting nut | 172 in-lb≈ 14.3 ft-lbHigh | LCT prints 20 N·m (172 in-lbs.) in the service manual's "79cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 79cc — exhaust studs | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "79cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 136cc — muffler mounting nut | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "136cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 136cc — exhaust studs | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "136cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 179cc — muffler mounting nut | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "179cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 179cc — exhaust studs | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "179cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 208cc / 223cc — muffler mounting nut | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "208cc / 223cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 208cc / 223cc — exhaust studs | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "208cc / 223cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 254cc — muffler mounting nut | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "254cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 254cc — exhaust studs | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "254cc Torque (N.M)" column (PGM45015 rev I, p.13). |
| LCT 291cc — muffler mounting nut | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "291cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 291cc — exhaust studs | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "291cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 306cc — muffler mounting nut | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "306cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 306cc — exhaust studs | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "306cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 369cc — muffler mounting nut | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "369cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 369cc — exhaust studs | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "369cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 414cc — muffler mounting nut | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "414cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 414cc — exhaust studs | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "414cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 420cc — muffler mounting nut | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "420cc Torque (N.M)" column (PGM45015 rev I, p.14). |
| LCT 420cc — exhaust studs | 177–212 in-lbHigh | LCT prints 20-24 N·m (177-212 in-lbs.) in the service manual's "420cc Torque (N.M)" column (PGM45015 rev I, p.14). |
Valve clearance — feeler gauge, not a wrenchValve clearance — set with a feeler gauge, not a wrench
- Kohler Classic K91 — valve/tappet clearance (cold), exhaust: Not a torque spec -- .011"/.015" cold, same table.
- Kohler Classic K161 / K181 (incl. K141) — valve/tappet clearance (cold), exhaust: Not a torque spec -- .017"/.019" cold -- looser than K91's .011"/.015".
- Kohler Classic K241 / K301 / K321 — valve/tappet clearance (cold), exhaust: Not a torque spec -- .017"/.019" cold, same as K161/K181.
- Kohler Classic K341 — valve/tappet clearance (cold), exhaust: Not a torque spec -- .017"/.019" cold, same as K241/K301/K321.
5 specs not published — Kohler Command PRO CH395 — muffler exhaust screw, Kawasaki FR651V / FR691V / FR730V / FS651V / FS691V / FS730V / FX651V / FX691V / FX730V — muffler / exhaust mount, Kawasaki FR541V / FR600V / FS481V / FS541V / FS600V / FX600V — muffler / exhaust mount, Kawasaki FX801V / FX850V — muffler / exhaust mount, Echo CS-590 Timber Wolf — muffler mounting bolt / nut What we found ›
- Kohler Command PRO CH395 — muffler exhaust screwGAP: the manual's Muffler Exhaust Screw row is split into an M8 column (24 N·m/212 in-lb) and an M10 column (35 N·m/310 in-lb), but the manual's table doesn't unambiguously assign the M8 vs M10 column to the CH395 specifically (M10/35 N·m is confirmed for CH440 — see that engine's row). No CH395-specific number is asserted without a clearer copy of the source table.
- Kawasaki FR651V / FR691V / FR730V / FS651V / FS691V / FS730V / FX651V / FX691V / FX730V — muffler / exhaust mountGAP: no muffler or exhaust-flange torque value is listed anywhere in this manual for the FR/FS/FX 651V-730V family -- the muffler is equipment-manufacturer-supplied on these mower engines, not a Kawasaki-specified fastener.
- Kawasaki FR541V / FR600V / FS481V / FS541V / FS600V / FX600V — muffler / exhaust mountGAP: no muffler or exhaust-flange torque value is listed in this manual for the FR541V/FR600V/FS481-600V/FX481-600V family.
- Kawasaki FX801V / FX850V — muffler / exhaust mountGAP: no muffler or exhaust-flange torque value is listed in this manual for the FX751V/FX801V/FX850V family -- equipment-OEM supplied.
- Echo CS-590 Timber Wolf — muffler mounting bolt / nutGAP: the CS-590 operator's manual prints no muffler-bolt torque, although the CS-400's does (8-11 N·m). The CS-400 figure is not carried over here — same brand is not the same engine, and this is a 59.8cc saw against a 40.2cc one.
My manual does not list a carburetor mounting torque. What should I use?
Compare the published values first: Kohler specifies 55–65 in-lb for the M6 carburetor mounting screw/nut across the CH620–CH750, CV620–CV750 and 7000 Series, and Kawasaki specifies 52 in-lb for the carburetor and inlet-pipe mounting bolt on the FR/FS/FX families. Four separate manuals landing in a 52–65 in-lb band on the same joint is a strong signal, so an unlisted M6 carburetor mounting screw or nut in that class is unlikely to want much more than 65 in-lb. Two cautions. That is an inference, not a specification — if your engine publishes a number, that number wins. And do not confuse the nut with the stud: on the CH395 the figure for driving the mounting stud into the block is 89 in-lb, while the nut that actually clamps the carburetor onto that stud is 71 in-lb. They are different fasteners doing different jobs.
Why does Kohler give two different blower housing torques for the same screw?
Because the thread is cut by the screw itself. On the 7000 Series the sheet-metal M6 fastener torques to 95 in-lb going into a new hole but only 65 in-lb into a used one; the Courage SV470–SV620 does the same thing at 99 in-lb new versus 68 in-lb used. The first install forms the thread in soft aluminium and takes the higher figure; every reinstall after that is into an already-formed thread that will strip at the original number. If you have taken the shroud off before, use the lower value.
Is there a common muffler bolt torque for small engines?
It tracks thread size rather than brand. Honda specifies 18 ft-lb for the M8x1.25 muffler nut on the GX160, and Kohler independently specifies 18 ft-lb for the M8 muffler hex nuts on the CH620–CH750 and the 7000 Series — two manufacturers, same thread, same number. Step up to M10 and Kohler's CH440 muffler exhaust screw goes to 25.8 ft-lb. Match the thread, not the badge. One caveat on lock nuts: where Kohler lists a lock-nut variant it torques higher, to 20.5 ft-lb. And do not carry any of that onto a chainsaw or trimmer: those mufflers are M5, and Stihl, Husqvarna and Echo all specify them in the 8-11 N·m band — 71 to 97 in-lb, roughly a fifth of the 4-stroke M8 figure. Two of them also specify it in two stages, tightened cold then retightened after a run, which no 4-stroke manual here does.
Why does Kawasaki publish no muffler torque at all?
Because on the FR, FS and FX mower engines the muffler is not a Kawasaki part. It is supplied by whoever built the mower, so the torque belongs in the equipment manufacturer's manual rather than Kawasaki's. The rows on this page say "not published" instead of showing a figure borrowed from another brand — if you need that number, look up the mower, not the engine.
Does the carburetor fuel bowl screw really need a torque wrench?
It is the fastener most worth one. Kohler's Courage SV470–SV620 manual specifies 45–55 in-lb for a Walbro fuel bowl screw but 96–113 in-lb for a Nikki — the same job on the same engine family, roughly double the torque, depending only on which carburetor is fitted. Guessing means either weeping fuel or a stripped bowl, and you cannot tell which carburetor you have by feel. Check the brand stamped on the bowl before you touch it.
These are in-lb and my torque wrench is in ft-lb. Can I still use it?
Not for most of this page. The carburetor, fuel-bowl and sheet-metal rows sit between roughly 50 and 115 in-lb — that is 4–10 ft-lb, the very bottom of a 3/8" ft-lb click wrench's range, where it is least accurate and usually below its minimum setting entirely. Those want a dedicated in-lb wrench. Only the heavy exhaust hardware is genuinely in ft-lb territory: the M8 muffler nuts at 18 ft-lb, Kohler's M10 exhaust screw at 25.8 ft-lb, and the Kawasaki exhaust flange nuts at 11 ft-lb. Everything else on this page — including the intake fasteners at 52 to 140 in-lb (about 4–12 ft-lb) and the Kawasaki muffler cover bolt at 61 in-lb — is still an in-lb job, and a 20–200 in-lb wrench covers all of it.
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