Fuel In Bilge

FranksMerc

Seaman Apprentice
Joined
Oct 6, 2003
Messages
34
I have a 1803 Bayliner Trophy, 1994. It has been sitting for awhile, 2 years.
I worked on it last weekend hooking up a remote gas tank to run the engine.

It ran fine, I put the "extra" fuel form the portable tank in the main gas tank and all seemed okay. When leaving I realized I forgot to lock the cabin (cuddy) door. When I opend up the cabin door I smelled a strong odor of gas and actually had some at the bottom of the cabin. (on this boat there is a pipe that runs from the bilge - under the gas tank and floor and then "vents" in the cabin.

Today, I pumpd out the gas, maybe 1/2 gallon and tried to figure out the problem. The gas gauge is reading empty, but I think it may be wrong. I suspect the fuel sender float isn't working and the tank is full. Its hard to tell for sure. I put a lead weight on a line and dropped it down, the line had about 12" wet - but maybe it was laying on the bottom.
My questions to the board are:

1. If the tank was full and the vent line was blocked is there a way for the fuel to get to the bilge? (besides a leak obviously).
2. Is there a relatively easy way to test the tank, some sort of pressure hold test with nitrogen?
3. The fuel sender is so cramped it will be hard to remove without dropping screws etc....
Anyone encounter this typ of thing before?
 

DaNinja

Lieutenant
Joined
Jun 11, 2008
Messages
1,407
Re: Fuel In Bilge

I have a 1803 Bayliner Trophy, 1994. It has been sitting for awhile, 2 years.
I worked on it last weekend hooking up a remote gas tank to run the engine.

It ran fine, I put the "extra" fuel form the portable tank in the main gas tank and all seemed okay. When leaving I realized I forgot to lock the cabin (cuddy) door. When I opend up the cabin door I smelled a strong odor of gas and actually had some at the bottom of the cabin. (on this boat there is a pipe that runs from the bilge - under the gas tank and floor and then "vents" in the cabin.

Today, I pumpd out the gas, maybe 1/2 gallon and tried to figure out the problem. The gas gauge is reading empty, but I think it may be wrong. I suspect the fuel sender float isn't working and the tank is full. Its hard to tell for sure. I put a lead weight on a line and dropped it down, the line had about 12" wet - but maybe it was laying on the bottom.
My questions to the board are:

1. If the tank was full and the vent line was blocked is there a way for the fuel to get to the bilge? (besides a leak obviously).
2. Is there a relatively easy way to test the tank, some sort of pressure hold test with nitrogen?
3. The fuel sender is so cramped it will be hard to remove without dropping screws etc....
Anyone encounter this typ of thing before?
I had a leak from my sending unit seal in the Starcraft after I replaced the sending unit (Thanks IBoats!) last year. The tank had been over-filled, so any gas above the sending unit ended up in the bildge. Your gauge problems would probably lead me to start there.
 

wire2

Lieutenant Commander
Joined
Jun 25, 2007
Messages
1,584
Re: Fuel In Bilge

I'm confused; you say you pumped out the tank, got ? gallon, but the tank may still be full? Or are you describing 2 different tanks?

2-3 psi of inert gas into the tank vent hose will tell you if there's a leak. It should hold the pressure after the source is removed, and the connection sealed.
Got a friend in a weld shop? They'll have argon, CO?.
 

FranksMerc

Seaman Apprentice
Joined
Oct 6, 2003
Messages
34
Re: Fuel In Bilge

Thanks for the reply. I pumped the gas out of the bilge (1/2 gallon..just about what I put in from the remote tank....
Also, there was no evidence of the sal leaking on the fuel sender....
 

wire2

Lieutenant Commander
Joined
Jun 25, 2007
Messages
1,584
Re: Fuel In Bilge

Is the tank aluminum? steel? Fiberglass? Any signs of it moving around when under way in rough water?
 

FranksMerc

Seaman Apprentice
Joined
Oct 6, 2003
Messages
34
Re: Fuel In Bilge

its aluminum, almost looks like galvanized steel. there doesn't seem to be any movement which may cause a wear leak.

I could always pump out all the fuel, I guess, and thn can tell for sure. Just not sure what to do with it.
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,148
Re: Fuel In Bilge

When I opend up the cabin door I smelled a strong odor of gas and actually had some at the bottom of the cabin. (on this boat there is a pipe that runs from the bilge - under the gas tank and floor and then "vents" in the cabin.

Huh,..?? What vents into the Cabin,..??
1. If the tank was full and the vent line was blocked is there a way for the fuel to get to the bilge? (besides a leak obviously).
Nope,... No way,... If anything, it should puke out of the hull, into the water, or onto the ground...

Aluminum tanks Corrode more so than wear from shifting...
Pinholes are quite common...
 

Summer Fun

Banned
Joined
Mar 2, 2002
Messages
2,251
Re: Fuel In Bilge

My friend owns 1996 Bayliner that had a corroded tank.
Water gets trapped under them and thats when the trouble begins. :eek:
 

oops!

Supreme Mariner
Joined
Oct 18, 2007
Messages
12,932
Re: Fuel In Bilge

your tank is toast.

gas can only get out of the sender if it is over filled and a bad seal.

remove the tank and repair/replace.........or

BOOM
 
Top