Kohler COMMAND CH18, Service Manual

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3.5
Section 3
Troubleshooting
3
Leakdown Test Results
Air escaping from crankcase breather ........................................................ Defective rings or worn cylinder.
Air escaping from exhaust system .............................................................. Defective exhaust valve/improper seating.
Air escaping from carburetor ....................................................................... Defective intake valve/improper seating.
Gauge reading in “low” (green) zone .......................................................... Piston rings and cylinder in good
condition.
Gauge reading in “moderate” (yellow) zone .............................................. Engine is still usable, but there is some
wear present. Customer should start
planning for overhaul or replacement.
Gauge reading in “high” (red) zone ............................................................. Rings and/or cylinder have considerable
wear. Engine should be reconditioned or
replaced.