Kohler ECV940 / ECV980 — Crankcase Vacuum Test (manometer)
Testing & diagnosis · Crankcase breather
For the Kohler ECV940 / ECV980, from the Kohler service manual.
Applies to: Kohler ECV940, Kohler ECV980
Before you start
- Carbon Monoxide can cause severe nausea, fainting or death. Never run engine indoors or in enclosed spaces.
- Rotating Parts can cause severe injury. Stay away while engine is in operation.
Procedure
- Insert rubber stopper into oil fill hole; connect hose between stopper and one manometer tube; leave other tube open; check water level at 0 line.
- Start engine and run no-load high speed.
- Open clamp and note water level in tube; level in engine side should be minimum 10.2 cm (4 in.) above open side.
- Close pinch clamp before stopping engine.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Crankcase vacuum minimum 10.2 cm (4 in.) of water
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.