On Sat, 21 Aug 2010 21:41:19 GMT, notbob wrote:

Be more definitive. Did it puff past you finger/thumb, regardless of
how hard you pressed to stop it? If so, that's enough compression.

No. I could easily hold my thumb on the hole. It puffed like the way you
would blow a fly off your wrist.

Of course, it's only a 40cc engine ... so I'm not sure how much compression
it should have.