Before you spend big money try this. because its not been run to much but it starts then stops there could be mosture in the tank or fuel lines and system, buy a couple of small bottles of gas line antifreez $ 1,98 put in gas tank this is mostly methenol ( this will eat up any water and should clear carb and injection system) run the engine if it stops they usually start right away and keep doing this till it keeps running and the system is cleared, fill up with new top graded gas with two more bottles, good luck. let me know how you made out.