[C320-list] Temperture Sender - 3GM30F

[Jamie Pett]

Jeff - Thanks.  Talked to Dennis at Seaward today, I am reasonably sure  the problem is the wire - he initially thought I had a bad gage - "lost zero"  and he sent test procedures to confirm, but I ran those tonight and the gage seemed  ok based  the  test.  Wire test definitely seems bad.

Think wire is bad or shorting to ground, but not sure how to confirm and find the problem with the wire and I ran out of daylight ! Might it be right at the sender - connection seemed fine ?  I am reasonably clueless about electrical systems.

Anyway, I'll let you know what I find - I do have the Seaward test procedures for the gage, wire and sender,  if anyone wants them. 

Jamie Pett
Bella Luna
#614


-----Original Message-----
From: c320-list-bounces at lists.catalina320.com on behalf of Jeff Hare
Sent: Tue 7/27/2010 7:32 PM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] Temperture Sender - 3GM30F
 
Hi Jamie,

Seaward made the instrument panel. That is where I gor a spare temp sender for our 2001 #809.  If you get one from Yanmar, it'll likely not read correctly as they have there own panel.

Check the connection on the sender. The wire may have corroded or may be shorted to ground.

Remove the wire and with a ohm meter, check whether the Screw in the end of the sender is a short to the case (ground). Also check whether the wire is shorted or broken?

-Jeff
 
------Original Message------
From: Jamie Pett
Sender: c320-list-bounces at lists.catalina320.com
To: C320-List at catalina320.com
ReplyTo: C320-List at Catalina320.com
Subject: [C320-list] Temperture Sender - 3GM30F
Sent: Jul 27, 2010 12:40 PM

 

I have what I believe is a failure of the temperature sender on our 1999
- Yanmar 3 GM 30 F.  On starting the engine, it immediately reads 240
degrees.  The engine is running perfect, pumping water and cooling fine,
etc.  

 

When I spoke to a marine dealer to get the sender, they said I needed to
know what system / gage type  it was, since it wasn't Yanmar made sender
-they mentioned  Teleflex, Stewart Warner, etc. - I cannot find any such
indication on the gage or the sender, although I have not removed sender
yet.

 

Anyone have any thoughts , including any special process for the removal
I should know about ? - It seems like its just one wire and then it
screws in like a spark plug.  

 

Thanks - 

 

 

Jamie Pet

Bella Luna

#614