Compression Test 20hp Kawasaki

[Rock Doctor]

I've never had much to do with smal engine work, did I miss anything.
Looks like I have weak rings on one cylinder, not too bad yet, but it is below spec.

RD

[george_pimpdaddy]

Good video RD! kinda makes me wanna test my magnum with 625 hours on it

[Jeff t-boss]

RD you're right on track. 10% of 180 from the good cylinder would bring your lowest allowable spec for weak cylinder to 162. I wouldn't condemn the rings yet unless you are having runabitily problems.

[wfo]

what you really need to do is warm the engine pull both plugs do compression test..
then do a leak down test...a leak down test is more accurate...then put a little engine oil down
into each cyl..about a tea spoon..then do another compression test and see how close they are..
if cyls are now the same you have a ring problem..
then do another leak down test if it stays the same as the first leak down test then you have a valve
problem..when using a leak down tester you should not have more than 20 to 30 % leak down on each cyl around 8 to 15 % is good