Gas fumes in cuddy

[RRRSmith]

I have a 1997 proline I/O 23’ WA, I‘ve replace vent host, intake fuel line and sending unit gasket and still have gas fumes only in cuddy. No sign of fuel leakage in bilge, no smell of fumes in bilge but it seems the fumes only come from the cuddy. Does anyone have any suggestions?
thanks

 

[FunInDuhSun]

Assuming you’ve properly replaced those lines, I’d take a close look at the tank. Is it plastic or aluminum? Maybe a crack or pinhole near the top where it wouldn’t leak.

 

[RRRSmith]

It’s a aluminum tank and I’m quite confident everything replaced properly, the mechanic has 30 years under his belt. I‘m thinking of putting tank under pressure . Any experience with this? Not sure what else to look for?

 

[Grub54891]

If the tank or hoses had a leak before, the fuel could have saturated someplace hidden and will smell for a very long time, or may not go away. Might have to dig deeper and remove the contaminated stuff.

 

[demarko210]

Make sure your fuel vents are not blocked with insects. I like the title by the way, Cuddly.

 

[dingbat]

Did you change the fuel fill hose?

Had this issue twice over the years.
The fill hose was the culprit both times.

If not the full hose, the tank is leaking.

 

[mike_i]

Did you have the issue before replacing everything or did you notice the smell after? Is the tank foamed in? Get it pressure tested.

 

[tpenfield]

Some cabins are more cuddly than others . . .

If the tank is foamed in, then fuel could be seeping into the foam and not readily present in the bilge. Otherwise a pinhole or weld seam crack as mentioned. Also the sender fitting/flange could be leaking.

 

[RRRSmith]

Thanks everyone for your responses! I believe my next step is to have fuel tank pressure tested.

 

[Scott Danforth]

Thanks everyone for your responses! I believe my next step is to have fuel tank pressure tested.

1.5 to 2 psi max. should hold literally forever. generally you need the tank out and need to use soapy water to check. tanks should be empty when you test as you may get a false reading with fuel in it.

if you go past 4 psi, your square tank becomes round and you run risk of blowing the tank up.

 

[southkogs]

I like the title by the way, Cuddly.

I changed the title. Though the autocorrect on that makes the boat sound so nice to be with