[C320-list] Temperture Sender - 3GM30F

[Scott Thompson]

Something on checking the oil pressure sensor/gauge/alarm and the tach 
would complement that nicely and make a great article.  Personally, I've 
gone through two different hand laser tachometers without being able to 
get a stable and believable reading on how fast my engine is actually 
turning over.  I suspect my tach is reading too low, especially at 
higher RPMs, but can't tell for sure.

Chris Burti wrote:
> Please post them here Jamie. I will write up a Mainsheet article and Karl
> will likely post it to the Association website.
> 
> On Tue, Jul 27, 2010 at 11:03 PM, Jamie Pett <JPett at jp2architects.com>wrote:
> 
>> 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
>>
>>
>>
>>
>>
>>
> 
> 

-- 
Scott Thompson
Surprise, #653