Welcome to the DoItYourself Forums!

To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community. It's free!

water pump pressure on Merc motor

Mike134's Avatar

Join Date: Jan 2002
Posts: 258

05-10-02, 07:36 PM   #1  
water pump pressure on Merc motor

I put a new impeller in my 40 hp Merc water pump being sure to bend the fingers in the right direction.

Now though when I rev the motor the telltale stream of water turns to a dribble but at idle it's strong.

Anyone have any ideas?

Sponsored Links
BoatMech's Avatar

Join Date: Dec 1999
Posts: 592

05-21-02, 06:15 AM   #2  
When you are doing this test is it in the water or on a
garden hose?
It could be you didnt seal the pump housing properly
and are sucking exhaust gasses.

Search this Thread