1980 Johnson 2HP Service Manual, Page 13Get this manual
ENGINE FUEL AND LUBRICANT
OF GASOLINE: numbersUse gasoline with the following minimum octane 86 91
POSTED OCTANE NUMBER Research Octane Number Most Commonly Used in the Past
Automotive gasolines regular-leaded or lead-free meeting these minioctane numbers used; however, best results will obtained using lead-free gasoline
1 NOTE When operating in any other country than the United States, Canada or Australia, any gasoline used which wlll satisfactorily operate an automotive engineUse Johnson 501 Lubricant which is BIA certified for service (two cycle-water cooled)It is formulated to give best engine performance with least combustion chamber deposits, least piston varnish, maximum spark plug life, and best lubricationSee inside back coverIf Johnson 501 Lubricant is not available, another BIA certified