Re: 1958 Johnson 5.5hp carb/starting problem Home › Forum › Ask A Member › 1958 Johnson 5.5hp carb/starting problem *FIXED* › Re: 1958 Johnson 5.5hp carb/starting problem MumblesReplies: 5755Topics: 298 September 30, 2018 at 5:10 pm #83753 The 3/4 setting on the high speed needle is a rough setting and just meant to get the motor started. Once it’s running, try speeding it up a bit and slowly turning the needle clockwise to lean it out. It should make a difference.