Bravo water pump issue

[wan hung lo]

Need a little help. Has anyone had problems with a new pump not picking up a prime. I had problems with this on both engines with new Mercruiser pumps. If I rev the engines to 1500 RPM they will pick it up, but the port engine loses it when I back down to idle. I have had everthing apart, drives off etc... Everything works great once overboard but makes a real pain to flush salt. I do not have low water pick up.
Thanks.:confused:

[shockwavebd]

I had the same problem on my starboard motor and had to replace the whole pump assy...............

[nitro557]

did you just replace the impeller,i always replace the houseing with every impeller and make sure the hoses are hooked up right in and out are marked on the back were the hoses attach

[nitro557]

if you have done all of that its a air leak in the main houseing

[wan hung lo]

I did replace the whole assembly on both engines. They are standard left hand rotation and I hooked up the hoses as the back of the housings said to. What is the main housing? Thanks.

[nitro557]

from the impeller to the belt pulley,thats the main houseing