I had an oil leak on the prop seal last year so this spring i pulled the lower unit, installed all new seal and impeller. Of course while i had it off I made sure to clean out all the lady bugs that decided to make it their home. Took the boat out and got an overheat alarm at 3/4-full throttle. Brought back home, ordered the entire impeller kit with housing, wear plate, etc, and new thermostats. Put it all together and while i was putting the muffs on to run it and check for leaks i found that i had put the "strainer" on backwards. Yes, I am indeed that guy!! Hopefully this is the reason for the alarm.