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Old 12-11-2014, 06:02 AM   #1
City: New Bern
Country: USA
Vessel Name: Southern Lady
Vessel Model: Grand Banks 42
Join Date: Sep 2011
Posts: 9
Unhappy Searching for FL Hi Temp Shutoff switch/sender

I finally got a reman Onan MDJE installed, wiring and running after chasing down what seemed like an endless number of gremlins. Then just as I was celebrating having heat underway the engine shut down. Turned out the high-temp shutdown switch had gone bad. Big problem as my local Onan dealer was told that it is "obsolete" and not stocked" by headquarters. Does anyone know of availability or a workaround? I am desperate.

Oliver Moore
Southern Lady
GB 42 Woodie
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Old 12-11-2014, 08:30 AM   #2
Ski in NC's Avatar
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 2,725
It's a snap disc normally closed with a setting around 200F. Pretty generic industrial item. I've found them before on line but it is a PITA.

Also make sure you have coolant bled of all air, the circ pump can trap air and not pump. Has a bleed cock on it, and also on water manifold.
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