I have a 2009 flatbed model that won’t start without starting fluid when it hasn’t been used for a couple days. The fuel pump does its normal thing of coming on for a few seconds when the key is turned on. Replaced the fuel filter with a see through one and it seems like there is a fair amount of air in the filter after it hasn’t been run for a while. After it does start it will restart without any problem as long as its within a few hours of the last time it was run. Don’t know if the electric fuel pump is for initial startup only and the engine also has one or not. Not sure How to diagnose the problem. Fuel pump is $750 for this model.