Gx390 dies after a few laps


New member
I have a fresh mild 390...the first time out it ran great for a few laps...then just died like someone hit the kill switch...motor is stock other than a 360 cam, hd valve springs, and tiilly Hl380... Also really hard to restart, it actually broke my remote starter, used another guys gear reduction starter and did start, but seemed like the compression relief wasn't working?
Kart43 is right on the money on the restart issue. Check that valve lash. As far as the shutting off goes, I would check the fuel tank vent, and fuel system in general. Next step would be the coil. Usually wont just shut down completely but never know. good luck.