i would check with the factory before cutting the trap out of the vent line it is probable there for reason like keeping gas fumes from always venting ?

I think the tank is plumbed before the top deck is installed. The side panel that the fire extinguisher is mounted on comes out with 3 screws. This gives you all kinds of room to shorten these hoses. I took the clamps off just under the check valves. I have not had any belching fuel since. It is a 20 minute fix.

I was running in heavy seas this weekend and ended up getting salt water in my fuel tank. Had to get towed. Best I can figure the water got forced into the vent. I believe it is important to route the vent hose up higher than the bulk head fitting before sloping down towards the tank. This will prevent water being allowed in the vent. Kind of line a bilge pump hose routing. That is probably what the factory was trying to accomplish with the xtra 12" hose.

Wow it musta been rough to do that. There are two check valves in the vent lines close to the hull fitting that should prevent water from entering. Does your boat have them ?