You can pull the thermostat housing and see if water is flowing up through the motor. I just did that on my motor (same 90 Nissan). I had this issue last year, it was a spider nest in the telltale hose out of the motor. But water through the thermostat housing would indicate whether water is...
Well, if you learn anything about the issue please share. I am waiting on parts right now. Also just learned that the thermostat is discontinued from Tohatsu. I did order the thermostat from the next (newer) model variant of the motor. the part number was only one character off. Hopefully it...
I have a 1992 Nissan 90 HP outboard. Lately it has been having issues with running with the boat on plane, anything above 1/2 to 3/4 throttle will kill the engine. It acts like it has the fuel cut out. bogs and stalls. It can sometimes recover by returning the throttle to neutral, sometimes it...
