Reply To: compression test hot or cold

[The red boat]

follow-up question:
do I open the throttle all the way and then test or does that matter?

I did a quick test cold last night and was getting 100 psi on one cylinder and between 95 and 100 on the other. My gauge is old and doesn’t hold the reading well so I had the wife watch the needle while I cranked the starter. she said the 100 psi reading was steady on one cylinder while the other cylinder fluttered the needle between 95 and 100.

not sure why the needle is steady on one and not the other.