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My 2022 25QXFBWA How much Usable Fuel will it hold

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48Snap

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My boat shows 56 Gallons on the fuel tank plate.
3 weeks ago my screen showed 11% fuel left in tank. The fuel station on the water put in 61.25 gallons. How can that be? I believe their fuel dispenser reader is broken.
My Bennington Rep told me that it could probably only hold 50 gallons due to the inability to get all the air out of the tank.
Anyone had this issue before?
 
Sounds like the pump wasn't turned off and set to zero before you filled up. In our area in northeast Florida, the marinas that we visit still seem to use the old style mechanical gas pumps and not the newer digital versions. I would be surprised if the gas pump was that far our out of calibration.
 
I had vapor lock last Sunday. Left the marina with 16.1 gallons, got back 4hrs later with 17 gallons . I took the cap off the tank to burp it, gage dropped to 10 . Checked with the dealer Monday he said I may have a venting issue. ( or heat related)
I have the Direct Fill option . I'm not taking it in this late in the season, I'll keep checking it until fall
 
Your 56g tank should only fill to 56g unless the designed air space (ullage... had to look that one up) is somehow also being filled. But if that were the case I would think you might dump fuel out of a vent.

My guess is there is some issue at the pump. Can you track how much you accurately use on your next outing - such as using fuel data from your engine - and then refill at the pump and see if any variation? Or try a different fuel dock?
 
I guess what I'm trying to figure out is are new vent systems only allowing air in and not out? As an engine runs and consumes fuel, the volume loss is replaced with air as the fuel level drops. How can a tank over pressurize while the engine is running? Typically if there is a vent issue, air is not replaced in the tank and if not replenished the engine will eventually stall from fuel starvation because it's trying to pull fuel from a vacuum. It's a very dangerous situation to have fuel under pressure in a tank. Us old timers remember the double line line OMC tanks in the 1950's that the engine pressurized the fuel and lifted it into the carb to provide fuel to the engine. If you had a fuel connecter Oring start leaking, you had fuel spraying everywhere.
 
I was told by my dealer that during hot days the tank expands causing the sending unit to rise with the expansion causing a higher than actual reading . Next time I go out ,hopefully tomorrow I'll check my vent
 
48Snap said:
My boat shows 56 Gallons on the fuel tank plate.
3 weeks ago my screen showed 11% fuel left in tank. The fuel station on the water put in 61.25 gallons. How can that be? I believe their fuel dispenser reader is broken.
My Bennington Rep told me that it could probably only hold 50 gallons due to the inability to get all the air out of the tank.
Anyone had this issue before?
Click to expand...
Sounds to me like you got charged for an extra 10 gallons. My SIMRAD display is very accurate in my experience.

The most I've ever needed to put in was 44 gallons, and the display said I had 11 gallons left. I always tell the dock guys how much fuel it's likely to need, and they're always shocked that I'm within a gallon or so every time.
 
My 52 gallon tank gauge on our old Benny was pretty accurate even though it would fluctuate when accelerating/stopping. I would cringe when we got down to 1/4 tank thinking that we would run out soon! So of course we would fill up! It would take about 39 gallons meaning we had about 13 gallons left! No need to worry!
 
Expanison is very small for our size tanks.
The standard coefficient of gasoline's expansion/contraction equals 0.069 % per degree Fahrenheit. At wholesale, oil companies buy and sell to each other at a 60 degree standar
 
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