Kohler L600 / L654 — Valve Adjustment (Valve-Tappet Clearance)
Adjustments · Valve mechanism
For the Kohler L600 / L654, from the Kohler service manual.
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Procedure
- Remove spark plugs then turn engine over until #1 piston is at Top Dead Center on compression stroke (both valves closed).
- Insert feeler gauge between tappet and end of exhaust valve; adjust tappet setscrew for very slight drag on the gauge.
- Repeat procedure on intake valve on #1 cylinder.
- Turn engine over until next piston is at TDC compression and repeat in turn on each cylinder until all valves are adjusted.
Tools required
- feeler gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Intake clearance .008 in cold
- Exhaust clearance .011 in cold
Source: Kohler service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.