I have had this in the shop 3 times now for this problem, after 15-20 minutes of operation engines stalls, acting as if it is out of fuel, pump the fuel ball and it restarts, runs only a few minutes and stalls again. Engine is on its own, spin on filter out of the main tank, we have replaced filter, fuel lines and squeeze ball, no cure as of yet? As well as other engine work done by the dealer.