Looking for Mercruiser Thermostat Housing

Skools Out · #1 07-07-2008, 12:59 PM

My water neck / thermostat housing on my 250 Sea Ray is shot. anyone have one in good cond. avail. for 350 GM 310 HP motor? mine has the raw water system with the 6 water outlets.

THEFERMANATOR · #2 07-07-2008, 01:26 PM

I've only got BRAVO 4 hoses here, but EBASICPOWER has the whole ALPHA style T-stat housing kit for $170.

http://bpi.ebasicpower.com/pc/GLM132...Small+Block+V8

Skools Out · #3 07-11-2008, 11:22 AM

Ferm does it matter that mine has the large housing and the stat cap is flat the 2 hoses in that one are in a seperate part mine is all one piece.

THEFERMANATOR · #4 07-11-2008, 01:55 PM

The 350 I pulled out of my SEARAY last year had the style your talking about. I'm pretty sure that this is the newer style that superceded it. Spare would know better than me though.

spareparts · #5 07-11-2008, 04:35 PM

skools, can you snap apicture of the one you need? The older ones preheated the water by allowing it to run thru the manifolds before it went inot the blok, works pretty good when its new and in fresh water. Anytime I repalce manifolds, I always update it to the new style and run the water outlets to the bottom of the manifolds, i also only use the 4 hole gaskets to let the water run out as fast as it wants. After they get some corrosion in them, it slows it down a little. by using the four hole gasets it keeps the manifolds from stopping up as quick. Down here, 4 seasons is about it for manifolds if you don't flush the engine, 6 seasons if you do. Basic power will have the best price on a new on for you

Skools Out · #6 09-07-2008, 02:05 PM

here's the style i had

fast boys will this work on my sea ray 350 with alpha outdrive?

http://cgi.ebay.com/ebaymotors/ws/eB...link:middle:us

spareparts · #7 09-07-2008, 04:37 PM

I think that will work, hard to tell from your previous pics, but did the original housing have the same # of hose fittings? If it did, I think it will interchange. you have the big hose inlet from the raw water pump, big hose inlet from the circulation pump, 2 small outlets that go to the bottom of the manifolds, 2 small outlets with the restriction balls that go to the riser. Looks like you have a match. The only thing that might be an ise, it appears the hoses to the bottom of the manifolds on your original style housing are 3/4 with the new one has hoses that are 1". You night have to swap hoses to the manifolds

Skools Out · #8 09-07-2008, 04:39 PM

yes they both do. what were you saying about the lower holes mine has hoses hooked up there. the 2 hoses with the balls goes to the risers

spareparts · #9 09-07-2008, 04:45 PM

mercruiser used molded hoses for the manifolds that had big ends where they hooked up to the housing( only bigger at the end), the original one looks like it uses smaller hoses(only on the end) than the one you are looking at

Skools Out · #10 09-11-2008, 04:49 PM

got the part today it looks new. the hose fittings are the same size and the right number of outlets. it has a 160 thermostat the old was a 180 the 160 should be fine on a carb motor right? i know on my vette and tahoes the cooler the better was on my old camaros and chevelles too.