Need some help/fuel problems

bobby2400

bobby2400

Junior Member
When I make a stop with full fuel tanks gas spills out of the vents. I have relocated the vents above the rail and replaced them with new vents. Still happens. Any ideas? Here are some pics. I'm not sure they will help.
 

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What year is that bobby?
Did the same thing on mine and haven't noticed any problems.
Can you get the loop in the hose higher to make it a little harder for the fuel climb up?
Looking at the picture, it looks like the hose drops below the top of the tank then back up to the vent.
Is it possible some fuel is trapped in that loop?
 
Didn't think of that. Could be the fuel is laying in the loop and each time I stop it keeps pushing it further instead of flowing back into the tank. Is the loop necessary?
 
No, it's just easier to connect everything.
First try to manage the loop up higher with tie wraps or the like and see if that improves the problem.
 
Loop in vent

Tsubaki- I read that you are supposed to put a loop in the vent to keep raw water from possibly entering the tank- unlikely but possible
 
Petrus, you got a point there.
If you had the vent below the rubrail and the water was jetted up along the side of the boat to the vent , it would be possible for the water to gravity flow into the tank. That being the case the loop should be immediately after and above the vent.
In bobby's case all he has to do is push the loop higher and secure the vent hose above the vent.
His vent location wouldn't allow water to jet into the vent.
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I Dont Knowwhat The Differance Would Be But I Would Get Rid Of The Loop I Dont Have A Loop In Mine And I Have No Problem
Also When You Stop Dont Look At It
 
I also moved mine up to the same area, No loop, and no problems?? I have mixed feeling on loops, if you have a loop and get gas in it will it block the air flow?? Some say the pressure will push it out??

When you fill up do you keep toping off after the pump clicks off?? When you fill just listen you will hear he air blowing out and no when to stot, but as soon as it clicks off don't try to round off the pump, You are FULL!
 
I dont have a loop in mine and it seem to be ok. It might be the opposite and moving the loop down lower would solve the problem. My thinking is that gas is in this loop. When you stop the gas (in the tank) shifts foward forcing air up the hose and this is pushing the gas in the loop out the vent. If it was lower the gas in the loop would have futher to travel and not blowing it out the vent.
 
When you fill up do you keep toping off after the pump clicks off?? When you fill just listen you will hear he air blowing out and no when to stot, but as soon as it clicks off don't try to round off the pump, You are FULL!
Click to expand...
What Wind Talker said :clap:

You've got to be real attentive. I smell gas fumes if I take it too far so first I estimate how much fuel I need to fill up. Then when I start getting close to that I get real close to the vent and listen listen listen. You'll hear the air and or gurgle just like MJ said. Stop right there! Hope this helps.
 
Thanks for the help. I have raised the loops and now I only put about 12 gal in each tank and so far no spray-out.
 
Fill it up and see next time. The setup you got should be a little better than the on I have. Mine is straight from the tank to the same location you have with 2-90° fittings between the two.
If it does spew while trailering just say "I'm returning back to nature" and keep driving.
 
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