"George" wrote in message
...
Stihl string trimmer, 2-cycle. It's been fading, and hard to start when
hot. I thought I'd check the compression when hot. (It was 50-ish).
Then, I thought I'd squirt some oil in the cylinder, and see what effect
it would have on compression. (Not much.) ...

But, now it's really hard to turn over, when the plug is in. Oops.
Just two little squirts of oil. It spins easily with the plug out.
Hydraulic lock?

I dried out the crankcase, and put it upside down to drain the cylinder.
Everything seems dry, but cranking is still hard. Any thoughts or
suggestions would be appreciated.

Thanks,
George
hydraulic lock is caused by having a liquid(incompressible) in the
cylinder.2 squirts of oil will not do it.besides if you spin it without the
plug any appreciable volume of liquid will be ejected through the hole.
perhaps the oil freed up a stuck ring and what you are feeling is the proper
amount of compression???