BillaVista
Petty Officer 1st Class
- Joined
- Jul 1, 2013
- Messages
- 204
1979 Johnson 55 inline 2-cylinder 2-stroke.
Upper cylinder: 132 psi / 145 psi after a couple of squirts of oil
Lower cylinder: 110 psi / 120 psi after a couple of squirts of oil
Seems to me that there's a good chance the rings on both are worn and/or the cylinders / pistons are scored.
Questions:
1) Could this be the cause of my poor idle (stumbles and drops a few hundred rpm), stalling when going into gear, and hard to start if not dead cold or thoroughly warm?
2) Is there any point doing a carb rebuild / link and sync before correcting this?
3) What are the chances it's just the rings that need replacing (and not a piston replacement and cylinder bore required)?
Thanks
Upper cylinder: 132 psi / 145 psi after a couple of squirts of oil
Lower cylinder: 110 psi / 120 psi after a couple of squirts of oil
Seems to me that there's a good chance the rings on both are worn and/or the cylinders / pistons are scored.
Questions:
1) Could this be the cause of my poor idle (stumbles and drops a few hundred rpm), stalling when going into gear, and hard to start if not dead cold or thoroughly warm?
2) Is there any point doing a carb rebuild / link and sync before correcting this?
3) What are the chances it's just the rings that need replacing (and not a piston replacement and cylinder bore required)?
Thanks