heres one for you

[67panel]

any one had this happen?moved bus last week and parked it up for 3hrs went to move it back and ran out of fuel,but it had nearly 1/4 tank when i parked it so pushed it back onto drive .had a look and sump full of fuel :shock: it must have syphoined through carb :roll: changed oil and put in fuel,8L and had to prime pump by sucking (spit spit)then it kept running through pump,any one seen electric cut of valve,maybe gas conversion one might do?

 

[RICH-I-AM]

sounds like you just need a new pump mate.
Diaphragms split i reccon.
If your carbs letting it in then the needle valves stuck open or your floats full a petrol.

Rich