I'll take a few pics tonight when I get home from work and post them.

The tank is ventilated and I even ran the fuel out of a 5 gal. container after I started it and the pressure dropped. When I did this I could feel hardly any suction from the end of the hose through the mechanical pump.

Except for a few small peices of rubber hose at the filter, tank and where I temped in the mechanical pump its all 3/8 hard line.

I've used 2 different electric pumps and 1 mechanical so I didn't think it was the pump. However, I ran out of fuel once on the way to the river in this vehicle and pumped fuel from the boat to use. Since then I had to replace the fiberglass tanks in the boat because the resin was breaking down and doing all kinds of bad things. 2 of the pumps I've been trying have been subjected to this bad gas so could that create the same problem. The one in the boat still works fine.