This motor runs perfect on water hose ,carbs clear ,new plugs,compression checks out good,fuel system is clear..although after running a few miles on water it will lose rpms and it will drop to around 2800...like its gone into some safe mode...but after it cools off the motor will run perfect again...new water pump on it and its pushing a hard stream of water out the whole time...its feels like it lost a cylinder firing or two....could this be a coil breaking down under load...please and help would be great....Thanks
