THIS IS A VERY STRONG MOTOR. HOWEVER THERE IS A PROBLEM WITH THE REMOTE NEEDLE . IT STAYS FULL OF AIR BUBBLES. I REPLACED MY CARB WITH A SUPER TIGER 60 CARB AND IT RUNS GREAT! 15,000 WITH A 11-5 MA AND IS EXCEPTIONALLY QUIET. I WILL SEND MINE BACK OVER THE NEEDLE THOUGH AND SEE WHAT THEY SAY. HOWEVER THIS A PROBLEM WITH MOST OS REMOTES.