Kohler K361 — Crankcase Vacuum Test
Testing & diagnosis · Crankcase breather system
For the Kohler K361, from the Kohler service manual.
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Procedure
- Run engine at normal operating temperature.
- Connect U-tube water manometer to oil fill hole with rubber stopper.
- Measure difference between columns; 5 to 10 inches water column required.
- If higher column is on engine side, vacuum is present.
- If out of range, check clogged breather, worn oil seals, blowby, leaky valve stems and dipstick cap seal.
Tools required
- U-tube water manometer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Crankcase vacuum 5 in. to 10 in. water column
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.