Reply To: Weak spark on 1973 20 Hp Johnson

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July 29, 2020 at 10:17 pm #210350
Don
Participant

    US Member

    Yes, the bowls are the same, except for the high speed jet, but the bodies are different…
    Did you check to see if the choke is staying fully closed while cranking? Are you advancing the throttle to its stop in neutral? It is not going to start easily at dead idle when cold..