Fuel overflow

This topic has 10 replies, 6 voices, and was last updated 15 years, 6 months ago by Bass Cat Boats.

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March 16, 2010 at 1:58 pm #355480

tadashisuzuki
Participant

Seems like every time I fill up my 07 puma I get fuel overflowing at the end(main gas tank). Its really touchy. Any way to fix this? I dont have this problem with the saddle tanks because I can see them filling and know when they are full.Thanks,Jon

March 16, 2010 at 4:04 pm #355483

shart59
Participant

I FOUND THAT THE ONLY REASON I EVER GOT BACK FLOW WAS WHEN MY MY BOAT WAS IN A POSITION THAT MY VENT HOSE SIDE OF TANK WAS FULL BEFORE THE REST OF THE TANK. OR I WAS PUTTING GAS IN TO FAST AND GAS WOULD GET IN THE VENT ELBOW AND BLOCK THE VENT TUBE . BOTH WAYS BUILD UP BACK PRESSURE AND CAUSE GAS TO BLOW BACK. I HAVE SEEN WERE THERE ARE TWO VENTS ON EACH TANK. I HOPE THIS WILL HELP YOU I SOME WAY.Last edited by shart59 on March 16th, 2010, 4:06 pm, edited 1 time in total.

November 21, 2010 at 7:27 pm #358935

Bass Cat Boats
Keymaster

Jon,I had the same rig and mine did the same at times. BCB may have a better answer but I believe it is from the gas going into the tank and creating a wave affect. As the tank fills the wave gets bigger and ends up blocking the fill tube so the gas going down gets backed up and comes back at you.If you have smart craft gauges keep track of how much fuel you gave burned then slow the pump when you get close to full.If you do not have smart craft and can guess how much you burned fill your main tank part way then let it sit while you fill your saddle tanks. This will allow the main tank to settle so you can go back and top it up. Jamey

November 21, 2010 at 8:03 pm #358937

Bass Cat Boats
Keymaster

You should be able to hear a gurgle just before it tops off. There should be a sleeve in a 2007 to allow faster fueling without obstruction, though once it tops off the fuel does not have any anti splash on a boat tank. There are two vents on a Puma tank, thus you can really put the fuel in on most fairly quick, though you will have to be aware on the top to prevent the splash from the vent in the neck.

November 21, 2010 at 8:05 pm #358941

Bass Cat Boats
Keymaster

There was a fuel fill line insert installed to prevent the back flow. Look down into the fill tube and see if you see a red insert. That was the fix for my 2006 Puma. My current 2011 P2 fill fine without blow back. I think they have solved this on the newer models.

November 21, 2010 at 8:29 pm #358943

Bass Cat Boats
Keymaster

The insert is the red sleeve that Bama96 mentioned.

November 21, 2010 at 8:54 pm #358946

billius
Participant

When I fill my CougarFTD tanks…I can always hear a gurgling sound just before its full…when I hear that, I stop fueling.

November 21, 2010 at 9:02 pm #358949

champion jon
Participant

Usually by the time I hear the gurgle its too late, even if I am filling at a slow speed for the last few gallons that I have estimated it will take. I just looked into my fill tube and there is no red insert inside. Jon

November 21, 2010 at 9:03 pm #358954

Tx76
Participant

Mine will stop in time if I have the nozzle all the way in. It blows out if I only have it in enough to hang there.

November 21, 2010 at 10:46 pm #358959

Bass Cat Boats
Keymaster

Another option is to put the nozzle in as far as it will go. Then stuff some of those blue gas station paper towels around the opening. Should keep it from coming out.

November 21, 2010 at 10:59 pm #358962

Bass Cat Boats
Keymaster

The red insert was a later discovery that was found to be a solution to filling issues. It is not in the fill spout, though all the way down in the top of the fuel tank neck on the other end of the fuel fill hose. Its hard to see!
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