Kohler — Crankcase Vacuum Test (Manometer)
Testing & diagnosis · Crankcase breather
From a Kohler service manual covering: ECV850, ECV860, ECV870, ECV880. Check it applies to your exact model before use.
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Before you start
- Carbon Monoxide can cause severe nausea, fainting or death. Avoid inhaling exhaust fumes.
- 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 in manometer is at 0 line and pinch clamp is closed.
- Start engine and run at no-load high speed.
- Open clamp and note water level in tube.
- 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
- Level in engine side should be a minimum of 10.2 cm (4 in.) above level in open side
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.