RDP brain trust, need some help.

[4Waters]

When I am filling my boat it burps fuel out of the fill neck like a lot, if I go half speed it clicks off every few seconds basically I have to almost let it drip in, an empty 50gal tank takes around 20 minutes to fill. So I have my thoughts but what do you guys see?

 

[HOOTER SLED-]

Sell it and get a different boat.

 

[DLow]

Next time you fill up, prop that fill hose up in the middle so it doesn’t have a horizontal section. See what it does. When hose isn’t on a grade, it burps.

 

[Rjt01]

Sounds like u have a blockage in the hose . Pull the hose off and have a look or get a borascope and run it down the filler neck . Oh asHooter said get a different boat lol

 

[Rjt01]

Another thing u could try is get a small hose 1/8” and run it down the filler to make a vacuumed brake .

 

[4Waters]

Next time you fill up, prop that fill hose up in the middle so it doesn’t have a horizontal section. See what it does. When hose isn’t on a grade, it burps.

I was thinking about putting the vent hose on top of the fill hose, the problem is that it is under the back seat so I would like to see what other folks think, and see what sounds like it would work best before I put it back together.

 

[socal0487]

When I am filling my boat it burps fuel out of the fill neck like a lot, if I go half speed it clicks off every few seconds basically I have to almost let it drip in, an empty 50gal tank takes around 20 minutes to fill. So I have my thoughts but what do you guys see?

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I notice you have a Caliber 1. We do as well and we have been having similar issues. Ours isn’t that slow but we can’t put it in full speed or else it comes out the neck or vent hole. We also have been getting vapor lock recently with a full tank. The vent isn’t plugged just not getting enough air. Any remedies?

 

[Rjt01]

Is that a vent that’s next to the gas cap ? If it is then it might be blocked .

 

[4Waters]

I notice you have a Caliber 1. We do as well and we have been having similar issues. Ours isn’t that slow but we can’t put it in full speed or else it comes out the neck or vent hole. We also have been getting vapor lock recently with a full tank. The vent isn’t plugged just not getting enough air. Any remedies?

I don't have a problem with vapor lock just the burping, hoping to fix it now. What model do you have?

 

[was thatguy]

On the Miller what I do is hold the rubber boot up on the nozzle so it works, then just barely put it in the fill hole. I can go about half speed then with the nozzle if I aim it just right. Can’t set it to fill on it’s own, just isn’t possible.

 

[4Waters]

Is that a vent that’s next to the gas cap ? If it is then it might be blocked .

Yes that is the vent and I have cleared it with air so it's not plugged but I am pretty sure it's got fuel laying in it causing the issue but I'm not sure.

 

[waterboy]

I had similar issue, it would click off every seven gallons, then burp out gas . And mine was the vent it had a kink in the hose

 

[socal0487]

I don't have a problem with vapor lock just the burping, hoping to fix it now. What model do you have?

23’ velocity

 

[Rjt01]

Yes that is the vent and I have cleared it with air so it's not plugged but I am pretty sure it's got fuel laying in it causing the issue but I'm not sure.

That’s why I suggested using a long length of hose and make a new vent . Like putting a straw in a bottle and it will free drain when u chug it lol run it to about 1-2” before it hits the tank and that should stop the burping

 

[bonesfab]

The air is not being allowed to escape the tank fast enough while you are trying to fill it. The vent line has gas sitting in it or it is not letting enough air out of the tank while you are trying to fill it. Deal with this all the time on hot rods.

 

[Rjt01]

Just a guess ? Is this boat new to u Or this just started? My guess is that the vent line is not clearing , try the hose thing and if that works pursue the vent line . I can help if ur near La Mirada.

 

[CJ_Donahue]

Almost every boat I have ever had, borrowed, even filled has had a similar issue. I have the habit of going slow and taking a short, two or three seconds, break every few gallons. Pain in the ass but I just consider it one of the many chores of boating.

 

[DRYHEAT]

Seems like a pretty common problem on boats with belly tanks, I know on mine I try to park downhill when I fill it and it does fill better. Unfortunately not always possible

 

[4Waters]

Just a guess ? Is this boat new to u Or this just started? My guess is that the vent line is not clearing , try the hose thing and if that works pursue the vent line . I can help if ur near La Mirada.

I have owned it for 4 years but it's an 07 and has done it since I've owned it. I live in Simi Valley, a little to far from La Mirada.

 

[Rjt01]

I have owned it for 4 years but it's an 07 and has done it since I've owned it. I live in Simi Valley, a little to far from La Mirada.

Cool , if ur in Parker some time hit me up and can look at it or if I am heading out ur way I will pm u .

 

[LHC Kirby]

I would reroute the vent line.... so it’s a little bit higher than fuel intake hose.... and give it a try.

 

[Groper]

Sounds like u have a blockage in the hose . Pull the hose off and have a look or get a borascope and run it down the filler neck . Oh asHooter said get a different boat lol

Haha it's very clear to me, you have the hose in backwards it's a one way hose remove it turn it around and re-install you'll be fine

 

[Bullhead bully]

Next time you fill up, prop that fill hose up in the middle so it doesn’t have a horizontal section. See what it does. When hose isn’t on a grade, it burps.

I agree make the hose go From the filler directly into the tank. Prop the hose up and do not allow it to lay horizontal at all. Possibly ziptie the hose to a broom handle or something like that just to prove the point. I had a similar problem on my pontoon fixed it quickly by just moving the hose a small amount.

 

[DYAM]

Had an issue like this several years ago.
Looks like both your 2" fuel fill hose and the vent hose are at a low spot next to your battery.
This could allow fuel to gather at the low spot and prevent fuel from flowing freely into the tank.
It could also allow fuel to sit in the vent hose and restrict the air flow. On a hot day with a full tank it could also cause fuel to spit out the vent.
I would think the vent hose should be installed so that it is constantly rising with no low or level spots. This helped in my case.
Like Dlow stated try placing a 2x4 under the 2" fuel hose the next time you fill up and see if that helps. Need to make sure the hose is level or rising. If that helps you might want to shorten the hose to make it easier to make sure the hose is installed so that it is constantly rising.
Good luck.

 

[Kbach]

It seems like with the dip in the vent line it's getting filled with fuel and not letting air vent. It's basically acting like a toilet p-trap...

To test if it's the vent line, pull off the existing and run another hose straight up so it's above the fuel filler and try putting some gas in it. At least that will narrow it down.

 

[UltraLucky]

Looks like the problem is the fill and vent are at the lowest point on the tank. The belly tanks seem to work best when the fill and vent are at the front of the tank Pretty difficult to solve with out lowering the bow of the boat when filling can do when on the trailer but not possible in the water. Any way you can access the front of the tank and run the vent from there? I had a boat years ago with that issue was always a problem. To make it worse the vent was right blelow the rub rail at the transom and would occassionally injest water. Moved the vent line and solved all the issues. Wasn't easy though.

 

[Bullhead bully]

In front of the battery the fuel slows and backs up to the filler elevate that and I’d be willing to bet your filling issue would be all but gone.

 

[Bullhead bully]

In a perfect world you want a vertical fill. Or as close to vertical as possible.

 

[DLow]

View attachment 753203 In a perfect world you want a vertical fill. Or as close to vertical as possible.

Although not particularly pleasing to the eye, it's nice to see your riggers used double clamps like they are supposed to, as did 4waters. Amazing how many people don't.

 

[NicPaus]

My boat does the same drives me nuts filling it. I have tried all different ways. Now I use a towel wrapped tight around fill so it can't burp out. Throw towel away as will never clean. My angle on fill hose is good think the vent hose is to small to work when pump is on full. Problem is are archaic pump is full or nothing takes forever to fill.

 

[LargeOrangeFont]

When I am filling my boat it burps fuel out of the fill neck like a lot, if I go half speed it clicks off every few seconds basically I have to almost let it drip in, an empty 50gal tank takes around 20 minutes to fill. So I have my thoughts but what do you guys see?

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Don’t feel bad. Mine did the same thing.

It has been a few years, but on mine I saw improvement filling with the pump at an angle, like 4’o clock.

I still had to go slow, but it would not click off all the time when I got it right.

 

[Angler]

Have you tried a different pump?
Vent hose, blow it out, make it bigger and reroute it, should be more vertical.

 

[buck35]

Try taking a block of wood to raise the tire on the fill side to elevate the fill a couple inches . It does look like you have a Swale in the fill hose.

 

[4Waters]

Try taking a block of wood to raise the tire on the fill side to elevate the fill a couple inches . It does look like you have a Swale in the fill hose.

I've done that with no improvement, I've even held the nozzle upside down and sideways.

 

[buck35]

I've done that with no improvement, I've even held the nozzle upside down and sideways.

Okay,just a thought. I had a flat bed truck and that was about the only way to gas up without having gas everywhere but in the tank. As others have said if you can shorten the fill hose a little to make a more direct incline to the neck.

 

[pavski2]

I have the same boat, and have always had the same problem since new. I have found that if i don't put the nozzle all the way in it seems to work better (just the tip, right) run the nozzle on low to medium. I have always thought that the vent hose was to small, not allowing enough air to escape?

 

[Classic Daycruiser]

Happens all the time with a belly tank, when the boat is in the water (marina) during a refuel.

An air pocket develops in the fuel tank, towards the front of the tank. As the fuel gets dumped in, that air bubble builds pressure, and eventually flattens out at the top of the tank. Since both the vent line and the fill line vent to atmospheric pressure, the air bubble pushes the fuel back out through the vent line and fill line.

I was told to eliminate this problem, I needed to refill my boat on the trailer, or install a vent line at the front of the fuel tank. I have a 50 gallon fuel tank, so I usually never run out of fuel on a day trip, and always pull my boat out at night.

I've own this boat since new, from Eliminator (1985).

 

[Instigator]

Put a loop in the vent line at the tank. Make sure loop is above the fill hose by 4 or 5 inches. That way fuel can't get trapped in the vent line and will always be clear to vent vapors only. It will also help keep any water from going into the tank as well.

 

[4Waters]

Update: I made sure the fill hose was elevated slightly so fuel wont sit in the bottom of it and I put the vent hose on top on the fill hose and shortened it a couple of inches. I went to fill the boat and was able to fill it at 50% or better without it clicking off or burping, thanks for all your advice, this place rocks. @socal0487 I hope this will help you with the filling issue.