TomCat fuel sender part numbers?

Captain Starbucks

Captain Starbucks

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Joined
Oct 19, 2011
Messages
124
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C Dory Year
2009
C Dory Model
255 Tomcat
Vessel Name
DOUBLE BARREL
Has anyone replaced their factory fuel sending units? I have installed a Victron Cerbo GX that does a great job of reading the fuel levels, but I have come to realize the fuel sending units hit their lowest level about 10 gallons before the fuel actually runs out.

I pumped both tanks to empty yesterday (leveled boat, pumped fuel out of outlets to engines, when it ran dry, I called that "empty"). What i found was that the sending units stay at their lowest level and I still pumped about 10 gallons per side. This leads me to believe that the sending units installed in my tank aren't optimized for the tank height. The tanks are perfect rectangles. Shouldn't be any weirdness on the geometry side of readings.

I always strive to run my boat as light as possible but I've been forced to carry about an extra 40-60 gallons of fuel I don't want to carry. That's about 250-400 pounds of dead weight.

Thank you,

Rob in Tacoma, Washington.
 
You could see it as having a 10 gallon reserve in each tank. If you’re willing to dip into it a little, that would add less than 100 pounds total, that’s a lot less significant and less impact on your boat attitude and fuel economy.
 
C-Wolfe, thank you for the idea, but I'm that weird guy who runs a High Accuracy Quartz wristwatch calibrated to the second every few weeks. I have no room in my life for padded data! It's much simpler for me to look at a gauge and read it as truth instead of trying to figure out what maybe I do, maybe I don't have enough.

Pacificcoast101, what year is your boat? Do you have the 75 gallon tanks? Thank you for the link, just trying to determine what length (depth) of gauge you installed. And did that gauge go all the way to the bottom?
 
I have a 2008 with 75 gallon tanks. I was just down at the boat and forgot to look at the part number and length.
 
The sender is 9" and reaches the bottom of the tank.
I just found them on Ebay for less than half price with free shipping.
Fuel sender
 
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