Kohler — Compression Test
Testing & diagnosis · Engine
From a Kohler service manual covering: 32690-12, EKT730, EKT740, EKT745, EKT750. Check it applies to your exact model before use.
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Procedure
- Warm engine; clean dirt from spark plug bases.
- Remove spark plugs.
- Ensure battery fully charged; unplug ECU.
- Open throttle wide.
- Install compression gauge.
- Crank engine and record compression.
- Compression should be at least 160 psi.
- Variation between cylinders should not exceed 15%.
Tools required
- Compression gauge Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Compression: at least 160 psi; not vary more than 15% between cylinders
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.