Re: Mercruiser overheat after running a ground
Is this motor raw water cooled or does it have a heat exchanger?IF RAW WATER COOLED, You may have sand in your block, manifolds, or riser elbows.Sand in the heat exchanger may also be a possibility If it is a closed system. After water pump inspection and or replace, Check to see if your elbows are hot.If they are blocked,they will run hot even in idle.They should be cool to the touch. If they are,you need to flush motor.If raw water, remove smaller hoses at thermstat housing leading to manifolds and flush with a hose with a good amount of pressure. Closed system, remove raw water hose that feeds exchanger and flush that.Good luck ,,I hope i helped. Mark