Bang on the bottom of the tank as its turning over. That should get it going again. You probably need a new one though and that's going to be around $800.00 if done at the auto shop.
2002 27PBS Holiday Rambler (Aluminum sided/roof) Love it!
Previous RV's
'94 Jamboree 22ft. (This beast had a 460 with tons of power)
'95 VW Eurovan camper (5 cyl. dog) Pulled a 3 rail fine though.
Tent:(
Borrowed folks '84 VW Westfalia (water cooled)