[C320-list] Engine Temp Gage

[millers1 at aol.com]

I have the Yanmar engine with the Seaward instrument package. When I bought the boat, the owner 
was in the process of trouble-shooting a temperature gage issue.
I have used the posted Seaward trouble shooting instructions and all checks-out ok.  However, as the engine 
warms up the gage suddenly falls to 0 after reaching about 120F.  This occurs with the new Seaward sender he ordered and 
installed . 
I note on the sender flange :  original sender he removed     7D44
                                               new one from Seaward last year  now installed    7M44
I suspect there is a resistance difference. I called seaward today to check and was told 
"Whale - Seaward" no longer supports engine control panels.
Does anyone know the correct sensor # for an original Seaward panel gage??
Has anyone  replaced the gage and sensor (as a matched set)  mfg and #'s ???
I plan to try NAPA tomorrow.
Thx.
Art   #680


-----Original Message-----
From: Welch, Myron D <myron-welch at uiowa.edu>
To: <C320-List at Catalina320.com> <C320-List at Catalina320.com>
Sent: Sun, Jul 7, 2013 10:27 am
Subject: Re: [C320-list] Starting Issue


Dave,

I battled that problem for four years and it always happened at dock. I could 
often get it to start with the extra boost from having the charger working. It 
was very unnerving to wonder if the engine would start after sailing. Various 
things worked, some for a day, some for a few weeks, and then the problem would 
unexpectedly reoccur. I think it is now solved and I am regaining my confidence 
in my trusty Perkins. 

As others have said, it is a loose connection in the starting circuit. The 
problem is that it can be several places and I think I had all of them. Check 
the following:

1. Clean and tighten ground wire connection on engine. 

2. Clean and tighten battery wire connection on the solenoid. 

3. Starter button. Take off wires and clamp together. I had instant success 
here, put in a new button and it worked for weeks.

4. Connection on solenoid. This was the most problematic. It worked after 
cleaning and tightening, but the problem soon returned. The connection is a weak 
design and I then installed a new, tighter connection.

5. After a month of sailing this summer, I had the problem again. This time I 
found loose connections at the wiring harness junction bar aft of the engine. 

6. I think that mine is now fixed. The only thing left in that circuit is 
changing the key switch!


Basically, start from the power source and check EVERY connection to the other 
end of the circuit. Good luck. 

Myron Welch
Wind Instrument #238
Iowa City, Iowa
Grace Memorial Harbor
Elk Rapids, Michigan. 

  

Sent from my iPad

On Jul 7, 2013, at 8:22 AM, "dprudden" <dprudden at comcast.net> wrote:

> .....turned the key, pushed the start button.....nothing. No click, plenty of 
juice in the batteries....
> 
> Pushed a couple more times and it did turn over and start. Any thoughts????? 
2001 Yanmar 3gm30f
> 
> While I'm at it, one more question- this is a European engine- are there any 
differences in parts between the European and Japanese engines?
> 
> Thanks for the help!
> 
> David Prudden
> #787