I did a compression test today, on a warm engine, and here's what I got:
#1 - 45 psi
#2 - 50 psi
#3 - 45 psi
#4 - 47 psi
Are these OK?
Thank you, Stephen! I just wanted to be sure, being a newbie and all.
With a 4 to 1 compression ratio, those are the numbers I'd be hoping for. Much higher would indicate a large carbon buildup, much lower could indicate valve or ring issues. Recommend measuring compression with throttle wide open and three good compression cycles on the cylinder.
That's exactly what I did, as per other postings I read here on the Forum prior to doing my own test... so I'm glad my readings are right on the money!