Re: "Newer" 25/35hp OMC compatibilities

[johnyrude200]

Finally got back to working on my personal project. So I’ve had the motor running continuously for the past 45 minutes and did a number of trials at WOT throttle. I adjusted the float setting, and verified that test wheel RPM’s (via a ’79 service manual) are supposed to be 5300RPM.

I was able to hit 5600 RPM today, so I am guessing it may have just been a float setting issue.

Now all I have to do is figure out why there is an intermittent water clog going on inside the water jacket. I keep catching the motor running too hot (180-200°) with almost no water flow out of the blubber holes. I shut the motor down for 30 seconds, restart, and then water starts flowing again and the motor operates at the correct temperature.

I installed a brand new thermostat before I even ran it the 1st time, so I may dig into the exhaust bypass cover to make sure there isn’t mud dubber houses in there.