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fuel/oil mix ratio

I have recently become owner of 3 older Johnson motors

Johnson 5 HP Model TD20
Serial #580330
1946-1949


Johnson 3 HP JW18R
Serial #B111037
1963



Johnson 5.5 HP CD13
Serial #1371171
1956

Not being too familiar with them, can someone tell me the spark plug and gap, and also fuel mixture for each of them? I sure would appreciate simple answers without abbreviations which I might not understand.

Thank you so much for your time.
 
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