Basic Engine Tests; Incorrect Vacuum In Crankcase - Kohler Courage SV470 Service Manual

the engine is reassembled and placed into operation.

Basic Engine Tests

Crankcase Vacuum Test
crankcase when the engine is operating. Pressure
testers.
Be sure the pinch clamp is installed on the
hose and use the tapered adapters to connect
manometer is at the "0" line. Make sure the pinch
clamp is closed.
Possible Cause
4. Restricted exhaust.
2. Start the engine and run at no-load high idle
speed (3200 to 3750 RPM).
tube.
below.
4. Close the pinch clamp before stopping the
engine.
1. Insert the stopper as in step 1.
stopper. Be sure the gauge needle is at "0".

Incorrect Vacuum in Crankcase

reassemble, and recheck pressure.
2. Replace all worn or damaged seals and gaskets.
Troubleshooting
10.2 cm (4 in.)
Solution
Section 3
3
3.3