Something is off for a rebuild 8 to 10 months ago. Certainly not right. Readings are uneven for a new rebuild. Something you would expect to see on a 10 or 15 year old work tractor engine. Could be a faulty compression tester. Not seated properly in spark plug hole. Lack of engine rotations.Bakers51 wrote:the compression is off. #1 = 87lbs, #3 = 65lbs, #4 = 85lbs, #2 = 96lbs.
Dry compression test. Remove spark plugs. Take and record compression readings. Need at least 5 compression strokes per cylinder to achieve the highest reading. Record all readings.Bakers51 wrote:I assume a dry compression test amounts to putting 10 to 20 lbs of air into each cylinder and listening and watching the bleed off noise and time? Wet test similar?
Wet test. Add table spoon of engine oil to each cylinder. Rotate engine several revolutions to distribute oil. Take compression readings again.