I just tested my johnsno 9.9s compression and it is at 75 and 76 psi on both cylinders. I tested the motor cold (as I had other stuff to fix) and with the tester in one cylinder while the plug in the second cylinder removed. Is this the correct testing procedure? Is this psi a definite indication of my internals being severely worn? I can't justify putting too much money into this motor, but I already did just rebuild the fuel pump, am putting new plugs in, and have a water pump impellar kit on the way so I would like to use it. I think the motor runs ok, but it's hard for me to tell since I've had multiple problems at the same time lately.
I think I could afford to do the rings and any gaskets associated with that job, and I think I'd also be capable but I haven't done anything like this on and outboard before. I've rebuild small go-ped 2 stroke motors but they are quite a bit simpler I think. Who's done a re-ring and how difficult was it? Is it a bad idea to tear the motor down that far and not replace lower end bearings? it's a 74 johnson 10r74g
I think I could afford to do the rings and any gaskets associated with that job, and I think I'd also be capable but I haven't done anything like this on and outboard before. I've rebuild small go-ped 2 stroke motors but they are quite a bit simpler I think. Who's done a re-ring and how difficult was it? Is it a bad idea to tear the motor down that far and not replace lower end bearings? it's a 74 johnson 10r74g