I’ll try posting again. I was able to start the J-65 today. I noticed that the needle valve adjustment was very sensitive. A slight turn either way would cause the engine to lose power, but the sweet spot seemed to work well. I’m not sure about the water cooling pump, however. A little water was coming out of the outlet on the shaft, but not much and it was clear that the engine was heating up, so I shut it down. I had been running it on it’s stand with the power shaft in a garbage can of water (no prop, obviously).
This afternoon, I removed the water pump and examined it. The piston is in very good condition it appears. No holes and the spring action seems good. I know from turning the engine over manually that it does move up and down smoothly. I removed the plugs and examined the check valves. They seemed to be clean as did the pump assembly in general.
I did notice that the screen on what I assume is the pump’s water intake was a little dirty and whoever had it soldered it in place and seemed to overdo it a bit, perhaps obstructing 20% of the screen. Perhaps it’ll do better now.
Do these engines water channels often plug up in the lines and in the power head? I tried blowing some compressed air through the lines and I think it was moving through, but the results were not conclusive.
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