[C320-list] Fuel Gauge Inaccurate

[Dave Hupe]

 Ian check this post out from Jeff Hare https://c320.org/article.php/FuelGaugeProblems
My fuel gauge also has been the same since I bought our boat. I haven't tried to troubleshoot it.  I have used engine run hours to determine when to fill and to approximate how much I will likely need.  For my Perkins engine I use about 0.4 gallons per hour fairly consistently. I am able to hold an absorbent pad under the vent and catch slight overflow since we slow down filling when getting close to my estimate of gallons needed.
Dave Hupe
1994 C320 (#32)
    On Saturday, November 28, 2020, 03:59:22 PM EST, Bob Borelli <cassattc22 at hotmail.com> wrote:  
 
 Yes Ian,
Same issue with my fuel gauge.  Generally on F+.
Just filled the tank at 3/4 on the gauge and it took 35 liters to fill.
I watched the vent for overflow, immediately shut off valve, pulled the funnel, had absorbent towels under vent.
Cleaned up.

Gotta be a better way to determine tank fill.
Bob  1995 no. 209
________________________________
From: C320-list <c320-list-bounces at lists.catalina320.com> on behalf of Ian Neale <kiwineales at yahoo.com>
Sent: Saturday, November 28, 2020 1:50 PM
To: c320-list at lists.catalina320.com <c320-list at lists.catalina320.com>
Subject: [C320-list] Fuel Gauge Inaccurate

Hi,

I was wondering if other C320 owners have issues with Fuel gauge inaccuracy.

Although I have once seen the gauge come off the hard stop showing the tank full, it is otherwise always showing full.

The one time it dropped to 2/3 full it needed at least 35 liters to fill it meaning it was in fact 1/2 empty. I have put as much as 25 liters in while the gauge is still showing full.

Is this typical and what can be done to improve the accuracy of the gauge?

While on the subject of the fuel tank, I have noticed that when filling the tank I often get a small amount of diesel spilling from the tank vent, what could be the cause of this?

Thanks, Ian Neale

Solutions Hull # 1122.

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