sre

Hey guys, need some help. I have a HP 500 in a 25 Daytona. Added a crossover and now I have a cooling problem. I am going to check the water pressure but my assumption is the standard water pickup on the Bravo is not sufficent with a crossover. I have fine temps at idle and cruising 40-50 but high speeds it skyrockets. I appreciate any input.

BY U BOY

I am running a crossover on a 454 with no cooling problems but i am not using a t-stat.

Make sure the t-stat is not sticking if you are running one also check your impeller.

ENFORCER24

I agree , sounds like a stuck t-stat , the water bypass will supply e-nuff water at adle but not at cruising speeds

sre

I have tried t-stat, no stat and one with 2 1/4" holes in it. All the same problem and the impeller is fine.

BY U BOY

back flush all the hoses for any possible blockage. Check the hose from the transom to pump make sure it does not have a kink in it.Check the oil cooler. Thats all i can think of.