Congratulations on finding a great motor! I just hope it has the correct starter and adjustment knobs on it as they can be tricky to find.
The powerhead is basically a ’56 Johnson FD-10 fifteen horse except it has a different reed plate since the motor has a fuel pump on it. There was no need to machine the plate for the check valves which the pressure tank motors use. Even the lower crank seals (the crappy ones which like to fail) share the same part number. I can’t remember what year or horsepower Johnson gearcase is on my ’63 Viking, but it was a direct swap. The ’56 FD came with a weedless prop which some people don’t like but if you can find one, it will push a light boat around quite well.
How about posting some pics? I’ll show you mine if you show me yours! 😀
https://www.youtube.com/watch?v=n9d0otig5nU
