The motor can be overheating even when peeing cool, e.g. with a thermostat stuck closed or a clogged cooling passage.
What I don't understand
If I'm right, and we are talking about the same boat, it's rated for an 85, so it's not overpowered. Looking at the pic again, I think the motor may be
What you are describing sounds a bit like what might happen with the prop too close to the hull. You need goo tip clearance so the turbulence from the
BTW - I left off one symptom. There is more fuel spray at idle out of the back of the engine (exhaust) than I am used to.
I am having a similar problem my chokes will not open and I am starving for air. See if the chokes are opening.