Re: 1975 Evinrude 50hp pumping water but still overheats
Welcome,....as far as I know these motors have upper water tube grommets...usually this leads to an overheat even with a good water pump and impeller..they are located at the base of the powerhead where the exhaust housing mates to the powerhead...one is on the long copper tube that's the water inlet from the pump..the other is on the short copper tube,thats the exhaust or hot water.....if either is plugged or deterioted they won't allow for proper water flow..either volume into water jacket or to expell hot used water..they are like 6$ each and replace the gaskets as you got....honestly I had never done it before and repaired/replaced entire cooling system from top to bottom in less than 8 hours...including removing and resurfacing head and replacing gaskets....best advise..have all your parts before you begin..it took me 3 weeks to get a few due to them being back ordered..Oh when you have it torn down, use compressed air to blow out water jackets from around the block...this will remove any debris from leaves dirt and silt to small pieces from a broken impeller