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-   -   Fueling issue (https://www.offshoreonly.com/forums/pantera/372155-fueling-issue.html)

riverrunner242 06-22-2021 07:26 AM

Fueling issue
 
I went to fuel up for the first time and had to hold the nozzle at about .25 trigger anymore and gas came out of the vent. Tank was empty. Any ideas or just gotta deal with it?

Wally 06-22-2021 07:37 AM

I'd take a look and see how the vent line is routed....it should be a separate line from the tank...maybe yours could be hooked to the main feed line???,,,not sure but it shouldn't be doing that until full (spitting out the vent)
Actually i have seen some fittings that do have the vent built into one assembly...maybe its just a matter of turning the fitting so the vent is at the top to keep the fuel from filling up the vent line...
On my old scarab i did have to find the sweet spot when filling it up....if the nozzle was just jammed in then the splash back would cut it off constantly when trying to fill at full speed. In my case if i wanted full speed fueling it had to be half out and slightly held up....

SB 06-22-2021 08:13 AM

Yup. Vent has a restriction...Could fuel or something else in it, usually caused by a low spot in vent line. Or a kink. Too many boats rigged with a vent line routed improperly.

TexomaPowerboater 06-22-2021 12:52 PM

Could also be something simple like a dirt dobber nest in the vent line.

squaz 06-22-2021 01:32 PM

I"ve had a 28 Pantera and now have the 36 and they both had that same issue when you fill them up while on the trailer. When they're in the water I haven't had a problem with fueling. I guess you get used to it.

bajaman 06-22-2021 04:47 PM

No, you can't just 'deal with it'...you don't want to have to take half a day to fuel your boat, NOR can you be discharging any fuel into the water...big fines in most states, for even the smallest spill...so you have to get this fixed before trying to fuel on the water.
If you can, pull whatever access you have to the fuel tank and look at both the fill hose and the vent hose. As others have said, you have something seriously wrong there, as the two hoses are separate (normally). Typically the only way fuel can even GET into the vent hose is when the tank is full.
Are you SURE the tank is empty?

riverrunner242 06-22-2021 05:48 PM


Originally Posted by bajaman (Post 4794684)
No, you can't just 'deal with it'...you don't want to have to take half a day to fuel your boat, NOR can you be discharging any fuel into the water...big fines in most states, for even the smallest spill...so you have to get this fixed before trying to fuel on the water.
If you can, pull whatever access you have to the fuel tank and look at both the fill hose and the vent hose. As others have said, you have something seriously wrong there, as the two hoses are separate (normally). Typically the only way fuel can even GET into the vent hose is when the tank is full.
Are you SURE the tank is empty?

yeah I'm sure I siphoned 75 gallons out of it because it was 2 years old. I'll have to try to get to the tank and see if the vent makes it all the way to it


bajaman 06-22-2021 06:25 PM

Hopefully you have fairly easy access...good luck!

Helmwurst 06-22-2021 08:11 PM

Check for spiders or muddobbers. Take a small pick and clean out the screen (s)

Griff 06-22-2021 08:44 PM


Originally Posted by riverrunner242 (Post 4794691)
yeah I'm sure I siphoned 75 gallons out of it because it was 2 years old. I'll have to try to get to the tank and see if the vent makes it all the way to it

There is no easy way to do that. The fill and vent hoses attach to the tank under the floor in the area in front of the passenger side bolster. There is a cut out hole there with and the cut is made at a 45* angle and the floor piece is then siliconed back in place. I know the fuel fill tube is behind the carpet in the boxed in corner of the closet cabinet. I think the vent tube needs to be accessed from behind the passenger dash panels but not 100% on that. I know all this because I thought I had fuel leak due vapors in the cabin and pulled everything apart. Turned out that the clamps for the fill hose had come loose.

Everybody keeps saying his vent tube might plugged?? How can that be if he is getting fuel out of it then??

My guess is the fuel vent hose loop is not high enough anymore. The loop needs to be higher than the fuel fill to work properly

riverrunner242 06-23-2021 06:27 AM


Originally Posted by Griff (Post 4794728)
There is no easy way to do that. The fill and vent hoses attach to the tank under the floor in the area in front of the passenger side bolster. There is a cut out hole there with and the cut is made at a 45* angle and the floor piece is then siliconed back in place. I know the fuel fill tube is behind the carpet in the boxed in corner of the closet cabinet. I think the vent tube needs to be accessed from behind the passenger dash panels but not 100% on that. I know all this because I thought I had fuel leak due vapors in the cabin and pulled everything apart. Turned out that the clamps for the fill hose had come loose.

Everybody keeps saying his vent tube might plugged?? How can that be if he is getting fuel out of it then??

My guess is the fuel vent hose loop is not high enough anymore. The loop needs to be higher than the fuel fill to work properly

I was thinking that about the vent not being clogged because fuel is coming out of it but then some guys mentioned the vent possibly running directly to the fill hose. I appreciate the info on where I can access the hose

speicher lane 06-23-2021 10:07 AM

I have seen where boats (seemingly built on a Monday or Friday) had hose that was too long in either the main fuel or the Vent lines. Excess fuel line the hose sagged lower than the filler neck on the tank = very slow fill.

For a long vent hose, it created a trap effect (think the same principal in a sink trap) where the vent line held fuel but couldn't drain back to the tank and doesn't allow air to vent - builds up with pressure from refueling and it will blow fuel overboard out the vent but also has enough fuel coming back up to replace the fuel previously held in the bellied hose (never ending cycle). This is an easy fix by getting the hose to lay/fit (shorten) correctly.

Hopefully the OP gets it solved.

SB 06-23-2021 12:40 PM


Originally Posted by speicher lane (Post 4794790)

For a long vent hose, it created a trap effect (think the same principal in a sink trap) where the vent line held fuel but couldn't drain back to the tank and doesn't allow air to vent - builds up with pressure from refueling and it will blow fuel overboard out the vent but also has enough fuel coming back up to replace the fuel previously held in the bellied hose (never ending cycle). This is an easy fix by getting the hose to lay/fit (shorten) correctly.

Hopefully the OP gets it solved.

Thanks, much better words than mine. Seen this a bunch of times. Sucks when you walk by a boat trying to fill up on land and gas shoots out at you. :(

Bile pumps too, but that's another story. :(


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