Home › Forum › Ask A Member › Johnson opposed twin questions › Re: Johnson opposed twin questions
I seem to have a mystery on my hands. The parts list that mumbles posted states that the OK 55, 60 and 75 up to 1939 used the internal spline crank and that all other OK models used the external spline crank. My motor has the internal splines, but has a 1940, OK 10 rope plate. It was built in the first batch of OK10s that came out of the plant. I wonder if they were just using up parts?
My crank seem s to be bent. When spun in a lathe, I have a noticeable wobble on the other end.
Is the crankcase head supposed to be a very tight fit in the case? I have a hard time getting mine in and out even after cleaning it up.
Might be time for another parts motors LOL