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Yes nice boat!!! To give you a compairson my friend has a 1957 Johnson 35hp on a small 14 foot old runabout. I was running a 1978 Evinrude 85hp 15 foot tri hull, heavyer boat.
I used much less fuel than Steve did? Better design I guess. My Mercury KG7 used the same fuel consumption as my KF7 both 10hp. The KG7 had twice the reeds too, go figure?
When you reringed did you check for cylinder wall taper? They wear like an ice cream cone, guessing!
When I was mini bike age we would raise the compression by sanding the head using modeling clay on the top of the piston to check clearances. When the clay was thin time to quit sanding! Crude but it was functional. They were lawn mower engines until we found West Bend or Mac go cart 2 stroke motors. Then we went to Honda 305 motors with a 4 speed trans on a go cart. Got pulled over once, no ticket, he just wanted to know what we were running.
P.S. replaced the brake petal for a shift petal. Who needed brakes anyway!! Just downshift to stop!