2014 Sabre FTD fuel tank issue

Hi BCB and Owners. I have owned a low hour Sabre FTD with 150 Pro XS for a few years. Zero issues of any kind. Recent 2 day tourney with very rough water due to the wind. Boat did ok but took some hard jolts. Ran enough during day to burn 1/4 to 1/2 tank of gas.On day two, got to gas station in morning to fill up. Tank would not take any gas. Squeeze handle and it would fill up gas tube and shut off. 10 min to put in 3 gallons. Never had a problem. Fuel gauge seems stuck on full. Could something in the tank possibly have moved in the rough water and is blocking the fill? And could it also have moved to mess will the fuel level sensor? How could this be investigated? Every time you open gas cap now, even in garage there is this huge vacuum sound. Any help appreciated.

Tagged: Fuel Tank, fueling problem, sabre

This topic has 4 replies, 3 voices, and was last updated 3 weeks ago by dtr949494@gmail.com.

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March 25, 2025 at 8:36 pm #727602
Will Hesch
Participant
Go to this thread:https://basscat.com/forum/groups/basscatowner/fuel-tank-pressure-too-high/ it just might be what’s happening with your Sabre

follow it to page 2
- This reply was modified 1 month, 2 weeks ago by Will Hesch.
March 26, 2025 at 4:29 am #727608

Bass Cat Boats
Keymaster

The sucking sound is air escaping when you open the lid as it’s under pressure. Any chance there are two tanks, or three, on your Sabre?

The 2012 and later fuel tanks have an FLVV system, which is a fuel limit valve. There is a VERY small chance that the FLVV is stuck and not allowing the system to vent. We’ve not ever seen one freeze, but, it is possible.

In your fuel cap there are five (5) white nodules, which are spring regulated valves. There two going one direction, and three the opposing, and those springs are different tensions. Those retain the vapors and allow the tank to have a release from vacuum when the engine is running, and allow the tanks to vent under pressure over 1 pound.

It is very possible that the vent line is kinked that controls the fuel venting, it also could have a swale in the vent line and be holding fuel that prevents venting. In that case, simply take a small blow gun and carefully blow a couple of short bursts into the vent line port, inside the fuel cap neck itself. You will see that port entering the side of the fuel neck, below the lip where the cap rests and seals. It’s appx. a 3/8” hole on the side of the 1.125” fill hose port hole.

April 21, 2025 at 1:55 pm #727842

dtr949494@gmail.com
Participant

Thanks for the replies. Let me go try the short bursts of air. Went fishing again this past weekend. Took 15 min to get 4 gallons in. First 1.2 gallons went in good while pulling gas nozzle as slow flow as I could. Fuel gauge is still pegged. Only one tank I think BCB to the best of my knowledge. Only one fuel fill. On the dash, switching from left to right tank makes gauge to straight to zero. Always has. So most likely one tank.

April 21, 2025 at 2:32 pm #727843

dtr949494@gmail.com
Participant

Tried the bursts of air in vent opening. What should I experience? The first burst or two, air comes out of main filler hole. Once I take my finger and air nozzle off of vent opening, rest of air seems to come out there. What is this valve you mention? The one in the fuel cap? I blew into all those like a straw and they allow airflow in one direction or the other… I don’t understand the fuel gauge being pegged at full.
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