by Douglas
(Waconia, MN USA)
Engine has always started without need to choke and would hold a perfect idle at about 800 RPM. Very suddenly will not start without choking and dies in idle position and at any attempt to go underway at anything less than 1000 RPM (forward and reverse). I have changed the fuel filter, drained the gas tank, refilled with non-ox fuel and checked the plugs.