Replacement Coolant Over-Temp Switch

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Evening Star

.
May 3, 2010
7
Morgan 41' Palm City
Our Morgan 41' has a Perkins 4.154 and the coolant over-temp sensor has a terminal broken off. It trips at 200 F, has 2 terminals, and the rest of the body is about 3/4" long. It is a 1/2 npt thread. Stamped on the part is "Elmwood", "3000-", "56-25", "F200", and "98/02".

Does anyone have a lead on where to get this replacement or equivalent part? I have tried auto parts stores, diesel shops, West Marine, etc. and no one seems to know.
Please see picture for reference.
Many thanks!
 

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woodster

woodster

.
Sep 15, 2009
6,244
S2 9.2a Fairhope Al
Evening Star said:
Our Morgan 41' has a Perkins 4.154 and the coolant over-temp sensor has a terminal broken off. It trips at 200 F, has 2 terminals, and the rest of the body is about 3/4" long. It is a 1/2 npt thread. Stamped on the part is "Elmwood", "3000-", "56-25", "F200", and "98/02".

Does anyone have a lead on where to get this replacement or equivalent part? I have tried auto parts stores, diesel shops, West Marine, etc. and no one seems to know.
Please see picture for reference.
Many thanks!
Click to expand
try here http://fenwal.industrialpartner.com/other-industrial-3/3150-026-102.htm
 
kenn

kenn

.
Apr 18, 2009
1,271
CL Sandpiper 565 Toronto
To replace this, you need to match 3 things

- bushing size and thread (if most available sensors have a smaller bushing, you might be able to buy an adaptor)
- temperature (200F)
- action (does it close above 200, or does it open above 200? The shop manual or electrical schematic should make this clear)

One last-ditch option is to solder a wire to the broken stub. This may work now, but wont be dependable in the long run.

Good luck!
 
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