dennisschuldt
New member
I have an 87 9.9 that runs fine at low to medium speeds. When I go to wide open throttle, it will run fine for about a minute or two, then it will start to overheat and no water comes out of the pee hole. As soon as I back off the throttle, it will start to pee again. When I bought the motor, the impeller was not working and I replaced it. I'm not sure if there is a blockage somewhere that only plugs when at full throttle. I pulled the thermostat and did not replace it. There was a little debris in the cavity that I pulled out. What should I try next to clear any blockage that might be in there?