I HAVE A 1976 JOHNSON 70 HP STINGER MOTOR <br />IT GOES GOOD BUT WHEN I PUT THE SHIFTER ALL THE WAY DOWN IT BOGGS DOWN A LITTLE,SO I BACK IT OFF A LITTLE AND IT RECOVERS,WHAT WOULD NEED SETTING,MAYBE IF I CAN PUT THE SHIFTER ALL THE WAY DOWN I WILL GET A LITTLE MORE SPEED OUT OF IT.(I JUST HAVE 1 LEVER)