7.4 Thermostat housing old or new??
 

Please help my thermostat housing got lost in a move and refurbish. I have a 1988 Chaparrel Villian 111 with a 7.4 Mercruiser Bravo1 and cant figure out if my housing was the old design or new. This has been a 5 year project and planned on getting in the water this year (so please don't judge me for not knowing, I cant remember ha ) The model # on the valve cover is worn off so not sure on model #

Thanks for the help

Old

http://i1140.photobucket.com/albums/...ps12tnm1be.jpg

New:

http://i1140.photobucket.com/albums/...psoqlxcns9.png

I have an old one for sale including sensors if you need it. Circa 1993

Ayuh,.... You can use the old style, Or the new style, so long as ya plumb yer manifolds to match,...

I imagine the original was the old style, with the check-balls,...

The second one looks like a raw water cooled thermostat.

You referring to cold vs warm manifolds? http://www.perfprotech.com/blog/arti...d-cooling-tips

The first pic is my raw water early setup. But it's a merc warm type thermostat housing if I'm not mistaken. This is the newer version of that:


http://i1140.photobucket.com/albums/...psi0rb0zdk.png