[C320-list] Fuel sender puzzler...

[ART HARDEN]

Although I keep an eye on the gauge, I seldom rely on it.  I keep a log of hours run and fill ups. The 1/2 gallon per hours has served me well for many years. 

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Art Harden
Catalina 320 "Tortuga" E-62
937.885.9380 (o)
937.477.5544 (m)

> On Aug 11, 2022, at 7:05 AM, ptormey at 4square.net wrote:
> 
> Just swapped out mine yesterday.
> There is a great article on Catalina Direct 
> https://www.catalinadirect.com/images/features/Engine%20Instrument%20technic
> al%20information%20small.pdf?CFID=11371816&CFTOKEN=c62de31af7567fe8-7D6CD8B9
> -93E2-5F5A-0C33CC2D2A9D8F81
> 
> Essentially, the gage is a voltmeter and the sending unit is a rheostat. As
> the arm swing the resistance  runs between 35 ohms when full and 240 ohms
> empty. You can read that with a multimeter from the pink wire on the gage to
> ground. 
> 
> If always 'full' it means the sender in likely shorted to ground. Make sure
> the connector on either end are not touching anything but their respective
> terminals.
> 
> Mine was shorted and always ready "Full". I replaced it with Seachioce Fuel
> Sender  model 15461
> 
> Good luck
> 
> Pat Tormey
> Catalina 320 #1037
> Blue Skies s/v
> Newport, RI USA
> 
> -----Original Message-----
> From: C320-list <c320-list-bounces at lists.catalina320.com> On Behalf Of David
> Birken
> Sent: Wednesday, August 10, 2022 9:17 PM
> To: c320-list at lists.catalina320.com
> Subject: [C320-list] Fuel sender puzzler...
> 
> The fuel tank on my C320 is not quite a cube but instead much deeper along
> the forward section than aft. The fuel level sender is positioned in the
> deeper part of the tank forward. I have just returned from a ~14 hour motor
> and filled up just before leaving. The gauge still reads full after
> returning and I ran pretty hard (3000 rpm) so I assume consumption was at
> least 1/2 gal per hour or more.
> 
> The sender was just replaced 2 years ago. Any ideas on how to calibrate
> this? Do I need to replace sender? How do I compensate for a trapazoid
> shaped tank? Anyone with experience on this?? I appreciate all thoughts.
>