my uncle has a White 2-135 that he used last spring and parked it now he wants to use it this fall and it turns over good but isnt getting fuel. if we take the line off at the in side of the fuel injection pump there is good fuel flow but nothing out to injectors when cranking engine over. it is a rossa master pump with an electric shut off built in, when he turns the key on I dont hear the electric shut off click like it does on the other tractor with a similar pump. Is it possible that the electric shut off could be stuck? it has 12 volts of power to it. is it easy to take the top off the pump and see the shut off parts and check them?