[C320-list] Fuel sender puzzler...

[ptormey at 4square.net]

You can probably calibrate the sender unit by bending it to agree with full.
BUT the lazy way would be to simply put a tick mark on the bezel indicating
how much fuel you just put in to top off. 

Fill the tank, add a writable tape to the gage mount, then after next refuel
mark the tape with that amount, repeat until a pattern appears.


Pat Tormey
Blue Skies s/v
Newport, RI USA

-----Original Message-----
From: C320-list <c320-list-bounces at lists.catalina320.com> On Behalf Of
Stephen Cox
Sent: Thursday, August 11, 2022 10:01 AM
To: C320-List at 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://www.boatingmag.com/story/how-to/troubleshoot-your-boats-fuel-gauge/
for ways of testing.

Cheers,

Stephen Cox
Tegwen #1141