3.5
Section 3
Troubleshooting
3
Leakdown Test Results
Air escaping from crankcase breather .......................................................Rings or cylinder worn.
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.
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