I have a x729 about 10 years old and only 230 hours. It started running rough for a few weeks and finally died. I wasn’t getting any fuel pressure to the engine. So I replaced the fuel pump, then when I went to turn it over the relay made a awful sound (cracking and hissing) so I replaced that. Went to turn over, fuel pump primed got flow of gas to engine but relay still making awful sound and engine will not start. I can get the engine to start using starter fluid in the air intake. So I know it’s not a spark issue. Sounds like a deeper electrical issue and maybe I didn’t need to replace pump in the first place. If anyone has experience with this issue let me know.