is this a safe alternative...

[fishinhardwater]

1988 Mariner 60 ser# ob248347 still having overheat alarm only at WOT. if i were to unhook the sensor (which goes to the overheat alarm) and put in a temp guage and watch the temperature is that a safe alternative? since a temp guage is taking water temperature instead of metal temperature?? if so how hot is too hot to run that engine (water temperature) thank you

original troubleshooting:
http://forums.iboats.com/showthread.php?t=263777

 

[j_martin]

Re: is this a safe alternative...

Find out why the alarm is sounding. Check the sensor. If it is good you have a genuine overheat.

Any cooling fault that is bad enough to set off the alarm will eventually allow one or more cylinders to overheat, seizing the piston, breaking rings, punching a hole in the crown, or such. Serious stuff to deal with.

hope it helps
John