Theory ... water flow
 

If you dont run a bypass ( pictured below) What is the path of the water to cool the exhaust ? No Thermosat ? If there is a thermostat seems the sea pump would be dead headed until the thermostat opens. I have seen holes drilled in the thermostat but seems no way that would be enough flow ...m

Re: Theory ... water flow
 

Over half the water flows to the exhaust at all times. Once the thermostat opens then water flows in the block too, but it always goes to the exhaust, all of the routing is done in the thermostat housing.

Re: Theory ... water flow
 

junk the stat

Re: Theory ... water flow
 

I agree. I don't run stats in my Formula. It has bypasses.

As a matter of fact, I'm in a chitstorm argument on another board where a guy says that it won't cool without a thermostat, which is totally against the principals of physices.

http://forums.boatfreaks.org/showthr...?t=6120&page=8

See if this info is helpful at all.
http://www.perfprotech.com/home/tech...oling-tips.htm

Re: Theory ... water flow
 

I understand how the stock Thermostat Housing works ... Mainly refering to a bypass setup and specificly the setup posted.... I assume no thermostat ....

But just for argument .. Maybe the thermostat never really closes ? Just Restricts flow ... Less flow as the thermostat moves to the closed position ? I had on go bad or stick a cpl of years ago and the motor temp was fine at idle ..but if you tried to come on a plane it would get Hot ....

Re: Theory ... water flow
 

No bypass hose, running a t-stat (even with holes) = blown intake gaskets.

From the above picture, ALL of the water flows thru the motor, then to the exhaust. May have a problem building up any heat.


T stats do close all the way, well maybe not a 100% seal, but real close.

Re: Theory ... water flow
 

But just for argument f that. go talk to your wife. just kidding. theres enough arguing on this site with out asking for it.

more importantly, junk the stats. judging from the picture you do not have a stock boat, nor power , therefore those theories do not apply.
1 1/4 inlet hose, water comes in, goes thru coolers, in engine. out heads, thru intake. out stst housing v.i.a 1" hose for the pupose of slowing the flow of water. out exhaust.
no back pressure problems. leave it alone.

just do it.






do it.






p.s is that a cigarette, looks like cig bilge.

Re: Theory ... water flow
 

Have to ask Old School, that's his old boat.

Re: Theory ... water flow
 

I run a small restrictor plate instaed of the t stat, if I put in a tstat my motor will blow. which it did. ;) (ok, i was parking the trailer while it was running in the water with my wife watching and she states when i got back in 5 min, :why is the new motor smoking like that") I still run too cool now with the smallest restrictor - dont know why. without it the temp gauge dosnt even move...strange.

Re: Theory ... water flow
 

I would bet that there are no stats or ones with a few holes in them.