1978 Johnson 55 HP Outboards Service Repair Manual P/N 506997, Page 14Get this manual

1978 Johnson 55 HP Outboards Service Repair Manual P/N 506997, Page 14

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If the proper tube or filler type can is not available,
TYPE OF GASOLINEUse gasoline with the folflowing minimum octane numbersPUMP POSTED OCTANE NUMBER Research Octane Number Most Commonly Used

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