1978 Johnson 55 HP Outboards Service Repair Manual P/N 506997, Page 10Get this manual

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SPECIFICATIONS Model Numbers 55E78 (standard length) 55EL78 (longer) Horsepower (B.I.Acertified) 55 hp at 5500 rpm Full throttle operating range 5000 to 6000 rpm NOTE The recommended full power operat

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