Reply To: 1977 25hp Johnson running issues

Home › Forum › Ask A Member › 1977 25hp Johnson running issues › Reply To: 1977 25hp Johnson running issues

July 10, 2021 at 5:55 pm #242399
Don
Participant

    US Member

    Yep, sounds like the lean spit these engines are famous for… Have you tried checking carb synchronization…The engine will never idle right if the throttle plate isn’t closed at idle or starts opening too early. Is it getting up to temperature? These engines won’t idle if running cold. Have you tried richening the idle mixture?