Take the fuel line off the carb and put it in a can or jar. Crank over a few times while you look for a nice volume of gas coming out. If you aren't getting nice squrts of fuel gushing out then there is a problem.
The symptoms sounds pretty much like bad fuel flow. When cranking if a little gas is still flowing it can fill the fuel bowls of the carb, and when it starts the engine will run fine until it sucks them dry again. I had this issue for about 6 months after reviving my PV from a 15+ year slumber. I just kept swapping those filters, eventually got most of it out of the system. Probably would have been a better idea to just clean the tank properly to begin with...
Other more subtle problems with fuel flow - leaking valves in the fuel pump, a non vented gas cap, tiny holes in the line between the tank and pump allowing air in.
--
I'm JohnMc, and I approved this message.
|