125 degrees F at idle?

P

PmDavis300

Petty Officer 2nd Class
Joined
Feb 8, 2008
Messages
160
so i thru my fat fifty in a tank of water yesterday and ran it for ten minutes or so at idle and checked the temperature of the water spitting out the exhaust relief boot using a meat thermometer. it was only about 125 and i believe its supposed to be 140? is that an acceptable engine temp running at idle?
 
F

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,195
Re: 125 degrees F at idle?

With a good water pump those motors will stay in recirculation mode at idle (not hot enough to open the thermostat). Sounds like you have a good water pump.

In fact, even at higher speeds the thermostat will repeatedly cycle open and shut as required to maintain temp. It is not an either/or deal.

Edit: Not sure that checking the exhaust water is an accurate indicator of powerhead temp anyhow. But it's probably close.
 
Last edited:
samo_ott

samo_ott

Vice Admiral
Joined
Jun 18, 2006
Messages
5,125
Re: 125 degrees F at idle?

Is it possible that the thermostat has been removed and thus the lower temp? Try holding the thermometer on the head.
 
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