In my boat (a 19' Bayliner bowrider with 3 liter MerCruiser), the fuel
filler pipe goes almost in a straight line from the fill end to the tank and
the vent hose goes almost in a straight line to the transom. At the transom,
it loops up, then back down to the vent. The vent hose is forced over the
end of the vent and held in place with a stainless steel clamp. I loosened
the clamp and pulled the hose off the vent. The vent is held against the
transom with a large, thin nut. I removed that and pushed the vent out. My
fuel vent is 281360 (the Perko).
If I knew what it looked like before I removed it, I would have bought a new
one and taken it with me to replace right away. Since I had to take it out
to see what to buy for a replacement, I cleaned it by leaving it in a glass
with CLR overnight. (It was so caked up from running in salt water that I
couldn't even blow through it.)
It works great now, but I won't bother to clean it a second time.

"Rod McInnis" wrote in message
...

"Richard Malcolm" wrote in message
om...
I have always had a hard time filling my gas tank up. When I would go
fast it would spill out the vent.

Well, like you and others have guessed the vent line is probably blocked.
It may not be blocked by anything solid, however. It might be blocked by
liquid.

Check the vent hose and make sure it doesn't have any dips in it. If
there
is a dip, and you have recently spilled gas out the vent, then there the
dip
will be full of gas. This will block the air from flowing out the vent.
If
the vent is higher than the filler spout then you will never be able to
lift
the gas in the vent hose high enough to purge it out by simply filling the
tank.

Rod