Tweet
Hello-
I bought a '99 8 hp Johnson (J8REEM) last fall. Ran fine when test drove, paid the guy, the attempted to take it right back out and couldn't get it started again. I have had it back out numerous times and it runs fine for about 5 minutes, then once it is warmed up, it won't start again.
Here is what I have done, and no change:
Replaced plugs and wires. Spark jumps across 12mm when tested.
Cleaned and rebuilt carb.
Rebuilt fuel pump.
Replaced fuel connection from tank to motor. Bulb stays firm. Tank vents.
Rebuilt water pump...it has always had a pretty good stream.
Changed lower unit fluid.
Tested compression, 74 psi on both cylinders.
What should I do next? I was thinking thermostat, then coil and or head gasket...
I have heard a compression in the 70s is fine, is this true?
At wits end....thank you in advance.
Phil
I bought a '99 8 hp Johnson (J8REEM) last fall. Ran fine when test drove, paid the guy, the attempted to take it right back out and couldn't get it started again. I have had it back out numerous times and it runs fine for about 5 minutes, then once it is warmed up, it won't start again.
Here is what I have done, and no change:
Replaced plugs and wires. Spark jumps across 12mm when tested.
Cleaned and rebuilt carb.
Rebuilt fuel pump.
Replaced fuel connection from tank to motor. Bulb stays firm. Tank vents.
Rebuilt water pump...it has always had a pretty good stream.
Changed lower unit fluid.
Tested compression, 74 psi on both cylinders.
What should I do next? I was thinking thermostat, then coil and or head gasket...
I have heard a compression in the 70s is fine, is this true?
At wits end....thank you in advance.
Phil
Comment