I have a 1994 Monterey 20' with a 5.0 and yamaha out drive, I was using the boat yesterday and started to overheat got above 200, let it sit for an hour it was at 180 ran for 5 minutes and was right back to 200 shut it down and got a tow, my question is I belive it to be an impeller issue was wondering if any one has changed them in an Yamaha outdrive before ? any help thanks...
