No exact numbers handy, but we're not talking in the hundreds on these low compression kerosene burners; maybe 70s?
I'd be surprised if you get it to fire unless you have some numbers up around 50.
I'd agree with double checking those valves. Can you put an air compressor line to your adaptor? You can find out pretty easy if what's going on if it's mostly one problem. Of course, if it has a blown head gasket, and carbon or rust valve seating problems, and worn guids - well you might hear air coming out so many directions you don't know what's what (except the head pretty much needs to come off then).
At least your oil test will tell if it's rings. Good luck!
Edit [as well as multiple grammatical!], maybe you didn't plan an oil test. It's pretty simple, take the reading as normal, then pour a few ounces of engine oil down the sparkplug hole, and take the readings again - no change, rings are either completely shot and you'll have it dripping down the sleeves (a quick peek in the handholes), or, more likely, your primary culprit is in the head, be it valves, gasket, ect.
This post was edited by spiffy1 at 07:32:25 11/19/08 5 times.
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