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- Jul 19, 2019
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Well, zip tied my throttle lever to handle and compression tested with my new $22 tester.
New plug was oily as were the threads. 50 lbs after 10 pulls, released pressure, same results.
Pulled muffler. Attached pics show rings are shot. New rings, and maybe cylinder.
Will start pricing repairs but probably needs to go to someone who can do the refurb in their sleep.
Saw may be up for sale soon. 20" bar, new 3/8 pitch chain still in package.
Thanks again,
Was that decompression valve still pushed in while you were testing (as it shows in earlier photographs)?
That oily stain on the cylinder shows something has been exiting there as per @cuinrearview suggested above- maybe the valve is loose in the cylinder (small end of a scrench fits them to tighten/loosen) or the valve is stuck in the decompression mode thanks to carbon.
Also, try your $22 compression tester on your 353 and see if it also reads around 50psi even though you know the saw runs- could be the fault of the tester not the machine being tested giving the way low reading.