Kohler CH5 / CH6 — Cylinder Leakdown Test
Testing & diagnosis · combustion chamber / valves and rings
For the Kohler CH5 / CH6, from the Kohler service manual.
Applies to: Kohler CH6
Before you start
- Make sure engine cannot rotate off top dead center in either direction
Procedure
- Run engine 3-5 minutes to warm up.
- Remove spark plug and air filter.
- Rotate crankshaft until piston is at top dead center of compression stroke; hold in position.
- Install adapter into spark plug hole but do not attach to tester.
- Connect air source to tester; turn regulator clockwise until gauge needle is in yellow set area.
- Connect tester quick-disconnect to adapter; note gauge reading and listen for escaping air.
- Compare results with leakdown test results table.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Kohler CH6 →
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.