Re: Lower unit 1957 Johnson 35hp Home › Forum › Ask A Member › Lower unit 1957 Johnson 35hp › Re: Lower unit 1957 Johnson 35hp gjonzReplies: 184Topics: 17 December 23, 2017 at 11:10 pm #68935 Replace the clutch dog. But check to see if the gears are worn. Gear sets are plentiful.