Around 300* on the each head. I haven't changed the pump because of the strong solid stream on muffs. Yes it's been sitting for 3 years. Compression is ~100 on each cylinder. Doesn't water circulate through the heads prior to coming out?
Your right of course. I was pointing the Raytek at the location of each piston upon the ONE SINGLE head. My plan was to see if any one single piston was the culprit.
