I need some help....I have an 89 marathon 3pg. I just completed a top end rebuild on it. I took my time and was very meticulous when putting it back together.
After the rebuild it seems to be running really hot and begins to lose power untill it won't run anymore. Once it cools off it runs again. I'd say it runs good for about 5min. Engine temp was around 300 degrees.
I'm premixing fuel. This tank I'm at about 100:1 for break-in. What I believe to be the air screw on the carb was screwed all the way in....I backed it out two turns but didn't seem to make a difference. Engine temp was 276 degrees.
Compression before rebuild was 50psi....after rebuild it's only 60psi.
1. If I have a compression issue with the oil seals, why am I overheating?
2. Are both the piston rings identical?
3. Is this normal during the break-in period.....and for how long?
After the rebuild it seems to be running really hot and begins to lose power untill it won't run anymore. Once it cools off it runs again. I'd say it runs good for about 5min. Engine temp was around 300 degrees.
I'm premixing fuel. This tank I'm at about 100:1 for break-in. What I believe to be the air screw on the carb was screwed all the way in....I backed it out two turns but didn't seem to make a difference. Engine temp was 276 degrees.
Compression before rebuild was 50psi....after rebuild it's only 60psi.
1. If I have a compression issue with the oil seals, why am I overheating?
2. Are both the piston rings identical?
3. Is this normal during the break-in period.....and for how long?