I have a john deere 430 lawn tractor and I am wondering if an aftermarket fuel pump can be used to replace the inline pump, has anyone used a different pump with success and if so what pump was used. Thanks a lot, just repainted, installed new tires, gave her an oil, air & fuel filter and she won't start, bled the fuel system, replaced the pump with an ebay purchased one but no luck, John Deere wants $350 plus for a replacement pump, also looking for a Kohler motor for a 1978 210 lawn & garden tractor. Thanks Larry