Hi
Im going to take my water pump off , who makes the best crossover kit with a thermostat
Thanks

I like this one http://teaguecustommarine.com/em0011...th-bypass.html, except that I'd order it with the thermostat housing to have AN fitting outlets.

JMPH,may i ask why you are removing the circulating pump?

I was looking and this one it catches my eye it's made by Diamond performance # 16634 with thermostat , does anybody use the Teague or Diamond Performance crossovers ?

If going with a thermostat outlet with AN fittings, make sure the fittings are big enough. Most mercury and aftermarket manifolds are fed with a minimum of 1 inch ID hoses. A -12an is substantially smaller, and may cause high water psi, or inadequate cooling of the exhaust/engine due to less flow. A -16 is still smaller than what mercury used

my thermostat housing is the old style and I need a new circulation pump so I thought that I like the look of these , I have been reading a lot of people like it and a lot of people don't ( hot spots in colder heads etc ) but I had it on my old boat and didn't have a problem , what do you think?

I not going with AN fittings , I going with the stock hoses but thanks

what engine do you have?

I've been contemplating doing this also but am concerned about hot spots in the back of the heads. Has anyone tapped into the rear of the heads to run a line back to the front?

You will need to run some lines from the front of the intake manifold (water jacket) to the rear water jacket on the manifold.