160 or 140 stat ???-gctid816795

[bucluv]

I'm having overheating issues with one of my engines & the other is perfect. just found out the perfect engine has a 140 stat & the hot engine has a 160 stat. i put the 140 stat in the hot engine & now she runs perfect. question is my specs call for a 160 stat, but its making my engines run hot like at 190. any input would be helpful....thanks

[builderdude]

Raw water cooled 140

Closed cooled 160

[builderdude]

Also gauge could be inaccurate. I use an IR temp gun to see what temps she's really running.

[2850Bounty]

"bucluv" post=816795 wrote:
I'm having overheating issues with one of my engines & the other is perfect. just found out the perfect engine has a 140 stat & the hot engine has a 160 stat. i put the 140 stat in the hot engine & now she runs perfect. question is my specs call for a 160 stat, but its making my engines run hot like at 190. any input would be helpful....thanks

[color]blue wrote:
As a general rule for our gasoline engines:

140 for open systems operating in brackish or salt water

160 for open systems operating in fresh water.

160 for all Closed Cooling systems.

Whether "open" or "closed" system, often the "spent" seawater (water leaving engine and headed for exhaust system) is restricted (rust scale, etc) causing over-heating regardless of the Thermostat rating.

Find the restriction, and clear the restriction, and your over-heating issue will likely go away!

.[/color]

[bucluv]

Thanks. As far as the temperature gauges are concerned I switched the temperature gauges from one side to the other making sure it wasn't a temperature gauge failure also there is not a restriction anywhere in the flow of water because I switch the housings from Port two starboard and from starboard to Port and whatever engine I put the cool running thermostat housing on the temperature is perfect so now I went out and bought a brand new thermostat housing with the 160 stat in there and whatever engine I put that on it runs hot so now my question remains I guess I have to put a 140 stat and see what I come up with. Was just curious if there is any problems from me using a 140 stat when the specs on the book and on the computer call for a 160