homan

cruising at 3k rpm what should water pressure be with a stock Mercruiser sea pump, w/pump crossover no stat and Gil dry pipes

CMS Racing

the pressure should be arond 10 to 15 psi with a cross over and no stat. if pressure is to low check the pump and the water inlet ( drive ? or transom pick up) if pressure is to high check for a restriction in the engine or the exhaust

homan

I'm getting about 4-5 lbs. w/new impeller

CMS Racing

What Kind Of Water Pickup Are You Running . Outdrive Or Transom Mounted

Active Mike

What type of water pressure should you be getting with a transom mount pick up standard Mercury sea pump and wet Gil exhaust?

Active Mike

I forgot to mention no cross over pipe and at WOT.

CMS Racing

In Your Case What Kind Of T Stat Housing Due You Have And Due You Have A Stat In .

Active Mike

Not sure on the t stat housing and thermo. What ever would be stock for a HP 500. I never had that apart.

CMS Racing

aproximatley 25psi at wot if every thing is right .the hp 500 housing has releif valves going to the gil exhaust risers. that hold the pressure to around 25psi.

Active Mike

CMS,
Thats right about where she run's at WOT.
Thanks.