How to rebuild an Indmar raw water pump the right way for your MasterCraft or Ski Nautique

The Indmar 68-5020 or other pumps are commonly used on the PTO (power take off) secondary side of the engine to bring water from the lake into your boat for cooling.

These can leak on the PTO side and slowly fill your bilge. This video shows you the common copper washer that most people forget and the order of the parts to put the pump together the correct way from the rebuild kit!

You can buy these parts much cheaper piece by piece, or get a kit the next time you replace your impeller and install them all at once.

It’s best to be safe and carry the impeller on your boat with you, in case it shreds due to dirt from the lake! If you have a raw water screener that helps to keep things clean on the input side.

Oh, one cool thing to know, the impeller can accept input water though either port, so you can connect the hoses in a more natural way, like raw on the bottom and output on the top to keep things clean and kink free below your motor.