ORIGINAL: Tired Old Man
John,
That tank height delta shouldn't make any difference. The carb can pull gas 3 to 4' straight up from the floor, and squirt it another few feet above itself. Down is even easier. Less head pressure. I'd be looking at the vent tube as the culprit.
OK Vent from fuel tank or vent line fro carb to back in fuse to dead air???
List what to look for in what you call vent tube...please
Too long?
Too short?
Loop around tank position? horizontal or vertical?
Vent tube inside tank?
Vent dia?
In other words....what the_ _el do I look for in vent tube?????????????????????????