Reply To: Weak spark on 1973 20 Hp Johnson

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August 10, 2020 at 1:53 am #211246
Phil Budne
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    Regarding the flood: Maybe the core plug on the bottom of the cylinder head?

    #15 (part number 202310) in the diagram at:

    http://www.marineengine.com/parts/johnson-evinrude-parts.php?year=1973&hp=20&model=20R73A&manufacturer=Johnson&section=Cylinder+%26amp%3B+Crankcase

    http://www.omc-boats.org
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