You are fortunate that you’re in fresh water!!! The end plate that I mentioned allows raw water to enter the cooling tubes and leave them after cooling the machine’s internal cooling system. I found my problem when I was having an overheating problem indicating the tubes were plugged.
I was able to clean the tubes by rodding but when I went to install the end plate it just about crumbled in my hands.... the internal sections
Art—- I really wish you the best of luck with your genny! I wish Koehler was still making them, magneto and all.
EDIT: Where did you find that governor spring? I looked for one for a friend and could not find it. What I was going to do was get a regular spring with the same wire diameter and cut it so it has the same number of sections and hope it would have the same Hook’s tension (Hook’s spring coefficient )