WHEN RUNNING FULL SPEED MOTOR WILL BACK OFF SOMETIMES. I CAN PUT IT IN THROTTLE AND REV IT UNTIL IT SMOOTHS OUT GETS POWER BACK,THEN PUT IT BACK IN GEAR AND IT WILL RUN SMOOTH AS EVER,UNTIL IT DOES IT AGAIN.SOMETIMES IT DOESN'T DO IT ALL.I HAVE REPLACED THE PRIMER BALL AND PUT FUEL TREATMENT IN...
