Heat Sensors

R

rjshomes

Recruit
Joined
Mar 27, 2005
Messages
4
I recently purchased a pontoon boat with a 40 hp Merc 2 cycle motor. It's a 1997, serial number OE258681. Is there any kind of sensor on this motor that will let you know that it is overheating? I noticed in a parts catalogue that there is something called a thermo switch. Would that be a part of a warning system and if it is, is there a way to see if it is operating correctly? Thanks in advance for your help. :)
 
AMD Rules

AMD Rules

Lieutenant Commander
Joined
Sep 23, 2004
Messages
1,707
Re: Heat Sensors

You should have a thermoswitch mounted on the cylinder head cover near the upper spark plug.<br /><br />They can be tested for function by grounding the wire connector. You should have a buzzer in your controls, that will beep to indicate the high temperature alarm.<br /><br />You can also remove the thermoswitch and test it for temperature range by immersing in it hot water etc and checking for continuity points at various temperatures.
 
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KCLOST

Commander
Joined
Jun 22, 2002
Messages
2,095
Re: Heat Sensors

The thermoswitch testing in hot water will work depending on the temp. it is set to give continuity.
 
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