Stainless Marine & Cooling System Mods with Nylon "T" Fittings
 

I think I have to "T" in a couple of cooling lines in my 1990 Formula with Twin 454 Mercruiser Magnums/Bravo's. The reason for this is I recently installed a set of Stainless Marine Exhaust manifolds and risers. The Thermostat housing has 6 outlets/inlets on it. The inlets are the two closest to the front of the motor seem to be from the engine circulating pump and another from the sea water pump. Then, there is 4 outllets that go to the Mercruiser style manifolds and risers. The two closest to the carb went to the Mercruiser risers and the middle two went to the bottom of the manifolds.

So, which of the four outlets gets connected to the new Stainless manifolds? Do I need to "T" the two on each side together, or just use the one closest to the carb?

Re: Stainless Marine & Cooling System Mods with Nylon "T" Fittings
 

All four need to go into the bottom of the manifolds. Call me and I'll send you some more 90's.

Re: Stainless Marine & Cooling System Mods with Nylon "T" Fittings
 

Are theNylon "T"'s ok to use? I soaked one in boiling water for 1/2 hour last night and it didn't seem to lose any shape or become soft.