Sea Ray

You know, I don't know why either, but I bet you're right. My mechanic ran a crossflow line between the two fuel lines and the plan is for me to make sure I have both fuel caps off when refueling. You're giving me added confidence that this will so...

That's interesting NagsHeadMike. So before you fill up, you put the plunger over the vent opening and give it a couple of pumps to break the air lock?

So you just give the plunder a couple of pumps before filling up? Do yuou place it over the filler cap or the vent?

Still researching, but I've read where this Perko solution may be better ghttps://perko.com/catalog/fills_and_vents/1095/inlet_check_valve___surge_protector_combo_pack/

Gotcha!