runs on the trailer,runs fine with a water hose hooked to it on the trailer but sit it in the water and start it ,it will slowly idle down spit and sputter and cut off.will only start back up if you pull it back out on the trailer.anyone have an idea whats going on?...alittle more info,when i got it it didn't run until i replaced all the ignition then ran great for 2 hours until i left a dock and drove about 100 yards to the trailer.when i got insight of the trailer it started acting up to this point.