No. 7 Cyl never gives evidence of a power stroke on '46 Flathead

[40cpe]

Originally Posted by flatjack9

I have never taken a compression reading with the engine idling nor have I ever heard of it being done. I don't see how you can get 45 at idle and 90 - 100 when cranking. Am I missing something?

I'm not an old hand at compression checking, but doesn't it take 2-3 revolutions before the compression gets to max reading on the gauge? While running, the cylinder only gets one pump before it is bled off.