[C320-list] temp gague

[jbrown5093 at yahoo.com]

Perfect,just what I needed.  Thanks
Jim

Sent from my iPad

> On Mar 24, 2016, at 9:11 PM, Stephen Cox <scox at timmin.com> wrote:
> 
> 
>> Sorry to add on to an existing thread but I suspect my 
>> initial email went into spam files again (not sure why but 
>> it's happened before) So I'll try this route. On first start 
>> up of the season I notice the temp gauge read over 180 with a 
>> cold engine (Yanmar 3gm) Shut down engine and with key off 
>> temp gauge was at baseline Turned key on and again over 180. 
>> Engine temp was room temp with an infrared thermometer. Took 
>> off wires to temp sensor in the out line to the water heater 
>> and gauge remained at base line even with key on. Any ideas 
>> and is there a troubleshooting procedure for the temp gauge 
>> on the website like there is for the fuel gauge?
> 
> 
> The testing procedure was outlined in a message back in 2010.  hope you
> findit useful.
> 
> Regards,
> 
> Stephen Cox
> Tegwen #1141
> 
> 
> SPECIFIC TEST PROCEDURE FOR TEMPERATURE GAUGE USED BY CATALINA YACHTS
> 
> (Other systems may use a different procedure.)
> 
> There are FOUR major sources of temp gauge problems.
> 
> 1 - The temp GAUGE in the engine control panel may be defective.
> 
> TEST PROCEDURE : Disconnect BROWN sender wire from "S" terminal on gauge.
> Turn on ignition switch. Pointer must deflect to extreme left. By
> temporarily shorting together the "S" (sender) and the "G" (ground) studs,
> pointer must deflect to the extreme right. Re-connect the BROWN sender wire
> to the gauge after the test.
> 
> 2 - The brown SENDER WIRE may be DISCONNECTED from the sending unit at the
> engine or SHORTED TO GROUND.
> 
> TEST PROCEDURE: Disconnect brown SENDER WIRE from terminal at sending  unit
> on engine. Attach brown wire to a KNOWN GROUND, such as engine block or
> battery NEGATIVE. DO NOT ASSUME THE BODY OF SENDER IS GROUNDED. Turn on
> ignition switch. Pointer must deflect to extreme right, as in previous test.
> Disconnect brown wire from ground. If pointer STILL deflects to extreme
> right, brown wire is GROUNDED at some point between the sender and gauge.
> Check ALL connection points on brown wire or replace the entire wire.
> 
> 3 - The SENDING UNIT may not be properly grounded to the engine block.
> 
> TEST PROCEDURE: If the gauge tests "GOOD" and BROWN wire tests "GOOD", touch
> BROWN wire to the BODY OF THE SENDER.(the flat area where you would place
> the wrench to install the sender.) Make sure this area is free of paint. If
> pointer does not deflect to right, (as in test above), the sender body is
> NOT GROUNDED. Remove the sender, and inspect the threads. If necessary,
> remove any TEFLON TAPE or PIPE DOPE COMPOUND. Clean the threads, apply some
> coolant to the threads, and reinstall the sender in the engine.
> 
> 4 - The SENDING UNIT in the engine may be defective or the wrong unit may
> have been installed.
> 
> TEST PROCEDURE: If the gauge tests "GOOD", the BROWN wire test "GOOD", and
> the SENDER GROUND tests "GOOD" the sending unit in the engine is defective
> or the "WRONG" unit may have been installed. The "CORRECT" sending unit has
> a specifaction of:
> 
> STEWART WARNER, 240 TO 33 OHMS RESISTANCE
> 
> There are several other resistance specifications available but those
> sending units WILL NOT WORK in this application.
> 
> TEST PROCEDURE, W/TEMP GAUGE
> PANEL DEPARTMENT April 22, 2003
> * WHITTIER, CA. 90601 * * SEAWARD PRODUCTS *
> 
>