[C320-list] Fuel tank gauge malfuction

[Joe Grande]

My experience on Whisper #772 with fuel readings over 21 years, has twice been the gauge. Getting continuity from the sending unit confirmed gauge problem.
Joe Grande
2000 #772 Whisper
Currently motoring up San Juan Channel in Washington State.

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________________________________
From: C320-list <c320-list-bounces at lists.catalina320.com> on behalf of Ferris Wills via C320-list <c320-list at lists.catalina320.com>
Sent: Wednesday, August 14, 2024 11:27:02 AM
To: C320-List at catalina320.com <C320-List at catalina320.com>
Cc: Ferris Wills <ferriswills707 at gmail.com>; c320-list at lists.catalina320.com <c320-list at lists.catalina320.com>
Subject: Re: [C320-list] Fuel tank gauge malfuction

Hi,

After running through the fuel gauge diagnostics described on the c320 site, I replaced the fuel sender on Argo(#505) with one ordered from Catalina Direct.

Removal of the old one required some contortionist moves from within the port lazarette but wasn’t too bad. Kit came with the required seal. Works well now, but I still maintain a written fuel log 😵‍💫

Ferris
Typos by iPhone

> On Aug 14, 2024, at 11:07 AM, mmellon via C320-list <c320-list at lists.catalina320.com> wrote:
>
> Hi all. My cockpit fuel gauge spontaneously started reading full (actually above full, completely to the extreme right full scale) when i know the tank is not actually full.Removing the pink lead from the gauge results in a zero reading (needle at extreme left. I haven't gotten any further with testing at this point but will. The resistance measured from the disconnected pink lead to ground is 23 ohms, corresponding approximately to a full tank I think.I am suspicious that the float in the tank is either mechanically stuck in full tank position or is defective.1996 Hull number 324. 19-20 gal tank.Does anyone have comment on this? How difficult is it to replace the entire sender unit, leak-free?  If i just remove the sender from the tank, is the gasket reusable? If not, are replacement gaskets available? Is the entire replacement sender from catalina direct compatible?Thanks in advance.MikeSent from my Galaxy:Mike Mellon