Hello everyone thanks for looking at my thread. i have just recently purhcased a used Yamaha 55hp 2cyl outboard. I do not know much about the motor but it cranks and idles and revs just fine. But after it gets to running temp it will not rev up it just goes (duh,duh,duh,duh) almost like a limiter. you are still able to turn off and crank back up but it will not rev up. If you let it sit and cool back down it will crank and rev until it gets warmed up. I have no clue so any advice would be helpful thanks. I am pretty sure its a early 90's model.