Turbodriven
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- Joined
- Aug 18, 2023
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Kohler command pro 27. After warming up the mower I get about 160 PSI in both cylinders with my compression tester. But then, when I pressurize both cylinders to 50psi at TDC (poor man's leak down test) I get air hissing and escaping through the oil fill tube (cap off). Pretty fast actually, it even blows a little smoke/vapor out during this.
Have you seen this before? Is there another way this could be happening besides rings (or maybe head gasket?) on this motor? I didn't notice any noise through the exhaust or through the intake. So valves seem good. It's the good compression readings that have really thrown me off here .
Just for reference, its a Gravely 260Z with 1200hrs, and the motor is bogging under medium and heavy loads. Motor starts easy and sounds great at rest or light loads.
Have you seen this before? Is there another way this could be happening besides rings (or maybe head gasket?) on this motor? I didn't notice any noise through the exhaust or through the intake. So valves seem good. It's the good compression readings that have really thrown me off here .
Just for reference, its a Gravely 260Z with 1200hrs, and the motor is bogging under medium and heavy loads. Motor starts easy and sounds great at rest or light loads.
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