[C320-list] Fuel sender puzzler...

[Joe Grande]

My experience with fuel gauge irregularities has been different. Whisper is #772 from 2000. During my 19 years of ownership I have logged 1,525 engine hours. I have replaced the fuel gauge twice. The sending unit has been tested both times and the varying impedance determined that the unit remains sound.

Joe Grande, Whisper #772

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________________________________
From: C320-list <c320-list-bounces at lists.catalina320.com> on behalf of Stephen Cox <scox at timmin.com>
Sent: Thursday, August 11, 2022 7:20:06 AM
To: C320-List at Catalina320.com <C320-List at Catalina320.com>; c320-list at lists.catalina320.com <c320-list at lists.catalina320.com>
Subject: Re: [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.
>
>
> Fuel gauge problems can often be cause by bad connections,
> particularly loss of ground.  Have a look at
> https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.boatingmag.com%2Fstory%2Fhow-to%2Ftroubleshoot-your-boat&data=05%7C01%7C%7C6a44f9a989a44d3bb38008da7ba4a239%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637958244294692953%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=0UQ9qjEMRHPl28oMY0jpNcprKEOf9XBXGNnHzsJYLlU%3D&reserved=0
> s-fuel-gauge/ for ways of testing.
>

Or as I just remembered, there is a gguide to testing the fuel gauges on the C320 web site at
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fc320.org%2Farticle.php%2F20120720230033574&data=05%7C01%7C%7C6a44f9a989a44d3bb38008da7ba4a239%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637958244294692953%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=6%2FRsAgl6OwgiyiGY5wX7A7SJxHukfyLR9U4WoMxfxWU%3D&reserved=0

Cheers again,

Stephen Cox
Tegwen #1141