Eisboch wrote:
"Mike Slater" wrote in message
news:knfZl.742458$yE1.158636@attbi_s21...
I was cruising along in my 24ft pontoon boat when I got a real surprise.
Somebody please tell me how and why I could be running wide open throttle
at my normal 5500 rpm and then suddenly the boat took off like a bat out of
hell running at 8000 rpms and 25mph??? I never touched the throttle. It
has never run that fast ever. After about 2 minutes it went back down to
5500 and never did 8000 again. Its a 60hp mercury Bigfoot outboard. It
has never done this before and I don't even know how it could rev that high
and go 25mph. Normal is 5500 and 17mph. What happened??

Mike


Is it a two stroke? I've often noticed on 2 stroke weed wackers or chain
saws that just as you are about to run out of fuel they speed up. I think
they start running lean due to air in the fuel line.
Is it possible you had a temporary air leak in a line and a similar thing is
happening?

Eisboch



For two minutes? I can't believe 8000 rpms didn't blow it up!