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Jan 23rd, 2013
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92' MERCURY XR6 150 GETTING HOT #13744221 10/26/20 02:49 PM
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JoseyWales34 Offline OP
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Like the title said, it's getting hot.

So here is what is happening:

When I bought the boat, it didn't pee very hard so I changed the water pump and fixed that. Now, when I'm just idling across the lake, the temp gauge creeps up to hot. Haven't had the alarm go off yet. When I get up to speed, it cools back down to normal temp.

I'm thinking "thermostat"?

I try to do all the work myself as I'm pretty handy with cars, but just wanted to see if someone with more experience than me could chime in and either confirm my suspicion, or give some other direction to try

Re: 92' MERCURY XR6 150 GETTING HOT [Re: JoseyWales34] #13744738 10/26/20 11:07 PM
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heybaylor Offline
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you can check the thermostats in pan of hot water(with thermometer) ,all they do is open and close.(around 140 degrees)
also, the older merc's will slowly get hotter at a fast idle 1200 plus..( no-one really runs at idle lol )
reason is the "popoff " valve (opens up full flow) does not open until about 1500 to 1800 rpm.
run it at real idle , and if it doesnt heat up , you are probably good to go .
if it doesn't heat up above 2500 rpm , that is normal op for the popitt valve.
hope this helps


heybaylor
Re: 92' MERCURY XR6 150 GETTING HOT [Re: JoseyWales34] #13745978 10/27/20 10:52 PM
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TLW Online Content
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no alarm?.. whats normal?.. install a water pressure gauge.... get a "temp" gun to test accuracy.... gauges are notorious for being inaccurate...

Last edited by TLW; 10/27/20 10:54 PM.
Re: 92' MERCURY XR6 150 GETTING HOT [Re: JoseyWales34] #13746518 10/28/20 01:15 PM
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boatman025 Offline
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whats temp gauge reading


Hughes Marine
3855 Osage Lane
Wylie ,Texas
Re: 92' MERCURY XR6 150 GETTING HOT [Re: boatman025] #13746535 10/28/20 01:24 PM
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JoseyWales34 Offline OP
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Originally Posted by TLW
no alarm?.. whats normal?.. install a water pressure gauge.... get a "temp" gun to test accuracy.... gauges are notorious for being inaccurate...


Normal is a tick over middle on the temp gauge

Originally Posted by boatman025
whats temp gauge reading


When it gets hot the temp gauge is pegging out on hot but the alarm never goes off

Re: 92' MERCURY XR6 150 GETTING HOT [Re: JoseyWales34] #13747087 10/28/20 06:42 PM
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oiler still on it?.. if so, do ya get tha self check beeps?.. have ya checked tha over temp sensor/buzzer?.. poppet may not be seating at idle/low rpms...

Last edited by TLW; 10/28/20 06:45 PM.
Re: 92' MERCURY XR6 150 GETTING HOT [Re: TLW] #13747816 10/29/20 12:27 PM
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JoseyWales34 Offline OP
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Originally Posted by TLW
oiler still on it?.. if so, do ya get tha self check beeps?.. have ya checked tha over temp sensor/buzzer?.. poppet may not be seating at idle/low rpms...



Oiler has been removed. I mix oil when I get gas directly to the tank. Haven't tried checked the over temp sensor

Re: 92' MERCURY XR6 150 GETTING HOT [Re: JoseyWales34] #13752279 11/01/20 06:50 PM
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pil,b Offline
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I would change the Poppett valve

Re: 92' MERCURY XR6 150 GETTING HOT [Re: JoseyWales34] #13754671 11/03/20 01:32 PM
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gary purdy Offline
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This is very normal to run warmer at idle.


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
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