Re: Synchronization

[jerry-ahrens]

I worked on a 1958 18 Johnson over the winter that had the same problem. This engine had one of the screws come loose from the air silencer and got itself lodged right up against the carburetor butterfly. Aparently someone then tried to force the throttle open with that screw still lodged in there. This ended up bending the shaft that holds the cam roller. It took me a while to figure this out! I had to bend the shaft back a little at a time to get the sync back to where it would be correct. Just a thought here. maybe this is your problem?