Ok ! just keep us posted would you please? When I get our lovely piece going again,it needs the same. JD put a check valve in our 6400. He said our 6410 would already have one? Ours starts fine if ran weekly. After sitting,it cranks too long and of course dies,,usually if I blip the throttle open towards wide open it will stay running. Nothing like prematurely wearing out pistons and crank to keep it running! If it does die,there isn't enough battery to get it going without waiting. Is it just me? Did JD really fall off the cliff with all of this computer crap? Well,I KNOW my answer. We had 15 years of FAILPROOF,BULLETPROOF service from them until all this electronic stuff.. 40-50 and 55 series. Thanx again!