Fuel line overflow

[The Pirate]

I have the '06 1800 SR3 with the V6. Shouldn't there be something in the fuel fill line to prevent overflow when filling up. I try to be good when i hear it coming up, but never seem to catch it in time.
Thought there would be something there to prevent spills.

[mmwjr]

You should have a tank vent that helps for this however on my 2400 they are about the same level and I have the same issue with it splashing back. I have considered moving my fill to a higher point.

[The Pirate]

OK, good to know. I'll look for that vent, and see if it's functioning. Thanks.

[shrew]

Install an inline fuel tank whistle. It installs in your vent line. As you fill the tank, air is force out of the vent line. As it passes through the whistle, you hear the whistle. When you hear the whistle stop, stop filling. It means there is not enough air in the tank and it is full.

This is the similar to what they use on oil tanks for residential home heating oil. The oil delivery guy has no idea how full your tank is, but he can hear the whistle from outside.

Here is the marine version:

https://defender.com/en_us/green-mar...0air%20escapes.

[mmwjr]

Originally Posted by shrew

Install an inline fuel tank whistle. It installs in your vent line. As you fill the tank, air is force out of the vent line. As it passes through the whistle, you hear the whistle. When you hear the whistle stop, stop filling. It means there is not enough air in the tank and it is full.

This is the similar to what they use on oil tanks for residential home heating oil. The oil delivery guy has no idea how full your tank is, but he can hear the whistle from outside.

Here is the marine version:

https://defender.com/en_us/green-mar...0air%20escapes.

Shrew I did install a whistle in my vent problem is by the time it stops fuel spills out the deck plate. I think the problem is that they are installed at the same level.

[shrew]

https://www.amazon.com/Clean-Way-Fue...hoCEesQAvD_BwE

[mmwjr]

Originally Posted by shrew

https://www.amazon.com/Clean-Way-Fue...hoCEesQAvD_BwE

The fill on the 2400 is low and angled ~45* so not sure that would help.

[donald]

Originally Posted by mmwjr

You should have a tank vent that helps for this however on my 2400 they are about the same level and I have the same issue with it splashing back. I have considered moving my fill to a higher point.

I have the same problem and was thinking doing the same thing.
I just do not fill the tank full.

Don

[yahoo82]

Just wanted to pass along that I was looking into the Cleanway fuel nozzle and their website says it’s good up to a 60deg angle. So it should work on your boat with 45.

[A Aron]

I have a similar situation I went to fill up my boat. My capacity of my tank says 21 gallons. I put 10 gallons in without on the water for probably three hours and boat shut down thought it ran out of gas sat for a minute started it up. Got back to the dock want to put gas in it only 3 gallons of gas and it started spewing out of the fuel tank vent on the back of the boat, a blue air into it to see if it was clogged also blue air into the filler hose to see if I can unblock it that way any suggestions on what I should do? My boat model is a 1989 Maxum with a 3.0 L inboard MerCruiser I believe it’s a 1700 model.

[A Aron]

Also, do not know how to ask questions without replying to somebody else’s

[shrew]

Originally Posted by A Aron

I have a similar situation I went to fill up my boat. My capacity of my tank says 21 gallons. I put 10 gallons in without on the water for probably three hours and boat shut down thought it ran out of gas sat for a minute started it up. Got back to the dock want to put gas in it only 3 gallons of gas and it started spewing out of the fuel tank vent on the back of the boat, a blue air into it to see if it was clogged also blue air into the filler hose to see if I can unblock it that way any suggestions on what I should do?

I think there might be two different issues being discussed here. The thread is about the fuel burping out of the fuel fill deck plate. That is common when the vent line is undersized or blocked. If you can't evacuate the same volume of air out of the tank as the volume of fuel you're pumping in, it will start backing up the fill line. Like overflowing a funnel.

Spilling out of the vent line means the tank is full. It can be a challenge to know when you're full without it either burping up the fill plate or out the vent line.

What you're describing sounds like the engine is getting starved for fuel. So if the fuel burping because the vent line is clogged? Or is it burping because it's actually full and you're engine is getting starved for fuel.

Stalling, then waiting, then restarting, then back to the dock only to overflow the tank when filling sounds more like a fuel delivery issue. If you were out of fuel, waiting wouldn't have made a difference and you wouldn't have gotten back to the dock.

[A Aron]

Not starving for fuel was out doing just fine like I said I was out for about three hours and what I thought was 10 gallons of gas that I put in it. The boat is actually running right now on the bunny ears and don’t seem to have any problem, but when I go to fill up the tank, it just comes out the fuel vent hole Just wondering if possibly it could be my antisiphon valve I am most definitely new to the boating world bought this boat off my older brother. It was the first time I ever took a boat out on the lake by myself with my family.

[shrew]

The fuel fill deck plate goes to the top of the tank. The vent line comes from the top of the tank.

If you're filling the tank and it starts coming out the vent line, then that would normally indicate that the tank is full.

If you're filling the tank and it should be empty and keeps burping back up the fuel fill deck plate that would typically indicate that either the tank is full or that the vent line is blocked.

A partially blocked vent line can allow an engine to run for a period of time, then eventually starve the engine. Did you open the deck plate, that would remove the pressure and allow the boat to run again. An empty tank wouldn't restart and get you home.

I wouldn't expect a blocked vent to start puking fuel

[mmwjr]

I sounds like your fuel consumption is correct and no issues with the vent. How many times has it stalled while on the water? How long did you wait before it restarted and did you do anything while waiting?