PTmowerMech
Lawn Addict
- Joined
- Apr 16, 2018
- Threads
- 387
- Messages
- 2,956
Using the new leak down tester. Read the instructions a couple of times. Watched a couple of video's til I thought I had it down.
First off, warmed the engine up, than drained the air compressor to about 90lbs. Then without pulling the valve covers, I put my thumb over the spark plug hole until it was pushing air out, found TDC with a pencil in the plug hole.
Hooked up the tester as it says, with a wrench on the fly wheel to keep it from turning, the reading on the cylinder leak side stayed in the "SET" position It dropped off of zero a little. Right on the 10% mark.
Funny thing, I can hear air from the oil fill tube on both cylinders. A steady flow of it. So shouldn't the cylinder leakage gauge show it actually leaking?
What am I doing wrong here?
Open the valve all the way, hook up the air hose to it. Turn the dial to zero. Then plug into the hose going to the plug hole.
First off, warmed the engine up, than drained the air compressor to about 90lbs. Then without pulling the valve covers, I put my thumb over the spark plug hole until it was pushing air out, found TDC with a pencil in the plug hole.
Hooked up the tester as it says, with a wrench on the fly wheel to keep it from turning, the reading on the cylinder leak side stayed in the "SET" position It dropped off of zero a little. Right on the 10% mark.
Funny thing, I can hear air from the oil fill tube on both cylinders. A steady flow of it. So shouldn't the cylinder leakage gauge show it actually leaking?
What am I doing wrong here?
Open the valve all the way, hook up the air hose to it. Turn the dial to zero. Then plug into the hose going to the plug hole.
Last edited: