Gas leak

A

Alyssa Jean

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C Dory Year
2005
C Dory Model
user_field_choice.c_dory_model_16_Angler
Vessel Name
Alyssa Jean
This is my 2005 25. About a month ago I noticed a slight gasoline smell in the cabin. After looking all through the area under the cockpit in the aft section I found an accumulation of about a 1/2 C of gas around the bilge pump depression. Cleaned it out and looked everywhere I could look to find the source. I removed both of the 8" round inspection hatches under the cockpit step and can see both the fill and vent hose connections which are all double clamped with no sign of a leak. I looked at the inspection hatch at the center of the cockpit floor and can see both the fittings and hose connections for the two gas lines which run over the top of the tank to the aft. I checked all the hoses, fittings, water sparator, etc and see nothing. This is leading me to think that the aluminum tank has developed a pinhole leak somewhere. All the fittings on the tank come through the top so they can't leak unless the tank is filled completely to the top and into the fill hoses.

Anyone ever had a problem like this? The next thing will be to pull the floor panel I suppose.
 
Didn't someone else have leak on their 25 and had to have the factory remove their tank? Was it Fred (Anita Marie)?
 
It was Fred, and the factory had to replace the tank. I suspect you might want your friends in Anacortes to check this out rather than going up to Ferndale. But I would not fool with leaking gas for sure, because it has a tendency to do really bad things in the presence of any spark whatsoever.
 
How old are the fuel and vent hoses? Did you check each connection? Hoses can rot from the inside out
 
I had a leak too. It was a hose. Apparently the E-10 gas eats away at hoses (from the inside, of course). I decided to replace ALL the hoses. Quite inexpensive, and easy too.
 
If the fuel line is breaking down, you find black debris inside the external (ex Racor) filter.
 
My fuel filter is absulutly clear. I have been using nothing but ethonal free fuel for the last two years. Not saying it can't be a fuel line, but....2/3s of the fuel lines can be seen and seem to be okay.
 
I understand. I was troubling shooting the simple stuff like hoses, clamps, tank and fuel connectors and hope the tank needs not be replaced
 
You probably do need to check the tank; aluminum is not an ideal material for fuel tanks. What keeps aluminum from corroding is a thin layer of aluminum oxide created by exposing aluminum to air. Often tanks are mounted in such a way as to keep the aluminum from being exposed to air, whether by strapping or mounting on top of rubber which holds water against the aluminum, etc.

Be safe,

John
 
Just curious on the fuel hose type?
Is it A1, A2, B1, B2...?
or was auto grade hose used?
 
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