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  1. M

    spark plugs for johnson 3h.p

    can anybody tell me what spark plugs i need for a jonhson 3h.p engine , and the gap size,points gap size model jh20b serial b119931
  2. M

    johnson 3h.p follow up question

    i am only getting one spark plug to fire .i have taken the fly wheel top off .points look o.k but the green casing on the coils is cracked
  3. M

    johnson year

    please can anyone tell me the year which my johnson 3h.p was made serial number b11 9931 modle jh20b . all so fuel mixture spark plug type and gap size
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