[C320-list] Perkins M30 Coolant temp sending unit

[Warren Updike]

Jeff, I just went through something similar although can't be sure.  On our
M30, it's not the temp sender that is mounted in the circulating pump it is
a high-temperature switch. The temp sender is actually on the stbd side of
the engine above the high pressure fuel pump. There is only one wire on each
device, so I'm confused when you describe 3 screws and 2 wires.

I'm going to send you pictures off-list so you can see what I mean. If you'd
like to send me your pics I'll be interested to see what you see. 

Warren & Pattie Updike
1994 C320 #62 "Warr De Mar"

-----Original Message-----
From: JeffWillis111 at aol.com [mailto:JeffWillis111 at aol.com] 
Sent: Monday, November 18, 2013 11:55 AM
To: c320-list at lists.catalina320.com
Subject: [C320-list] Perkins M30 Coolant temp sending unit

Hello All,
 
I have been a member for over a year now and have never posted  before.  
First let say thanks to everyone for all the knowledge I have  gained from
reading the discussion lists.
 
I have hull 174 and recently replaced the circulating pump on the Perkins
M30.  Everything seems to be up and running fine except for the temperature
gauge.  I thought I had a good diagram of all wiring and hoses but I guess I
goofed up on the temp sending unit that is mounted in the top of the
circulating pump.  It is about a 1" diameter with 3 screws on top with 2
wires connected.  I took photo before disassembling but found one of the
wires 
was apparently not connected to anything when I removed the pump.   The temp

gauge was working fine before I removed pump.  I have tried  numerous
configurations when reconnecting but nothing works.  
 
Any help would be greatly appreciated.
 
Thanks,
 
Jeff Willis
Esprit, #174