[C320-list] Perkins M30 hot water sender problem - photo posted to the list

[Christian]

Bob,
I replaced mine 3 years ago with this one:
https://www.westmarine.com/buy/sierra--temperature-sender-used-with-light--10530822

All the high temp senders I could find at the time were rated at either
160F or 200F.  My Perkins runs between 178F and 182F, so I had to go with
200F.  And this part will be the correct threading for you.

This part looks different than the original.  It will ground its self when
screwed in, and you only need the hot wire connected to the top, if I
remember correct, so you won't need to connect your original ground wire (I
just wrapper the original ground wire in electricians tape, and tied it
off).  The original part had 3 connectors on top, never knew what the 3rd
connector was for.

Hope this helps.
Christian Caperton
1994 C320 #138 "Canuck" Monroe Harbor Chicago, IL

On Fri, Jun 26, 2020 at 8:46 AM Bob Borelli <cassattC22 at hotmail.com> wrote:

> The hot water sending unit attached to the top of my Perkins M30 water
> pump sounds the alarm & red lamp on the control panel at 150 degrees.
> And not when the diesel overheated from a stripped raw water impeller.
>
> I have taken the sender apart, adjusted & given up.
>
> I cannot locate a similar part to replace the sender.
>
> Does anyone a similar sender and installation on their M30?
>
> I posted 4 pictures on page 10 of C320 Discussion List Technical Photos
> because the pics are too big to email.
>
> I contacted parts4engines and they don't have a similar sender.  I intened
> to unscrew to determine the thread NPS and buy a sender from parts4engines
> plus a Borel Mfg Raw water alarm to connect to exhaust hose.  I cannot
> have the M30 overheat without a warning alarm.
>
> Thank you all,
>
> Bob Borelli,  1995 C320 no. 209 'Elusive'  Georgetown, MD
>
>