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91 octane
87 octane oil mixture of 40:1
On Johnson outboards, the model number is used to determine the year model of the engine.
In order to determine the year model for a Evinrude, or Johnson outboard, the engine model number is used.
Changing the impeller on a Johnson 70 hp outboard motor requires pulling the power head and disconnecting the engine. Once this is done, an open end wrench can be used to first loosen the fitting before removal.
i used 1 qt to 6 gal. but it was 1964 and we used 30 weight oil
It is used in lead-acid car batteries and used to be added to gasoline, to improve combustion (octane level).
50:1 is used by most OMC 2 cycle outboards.
To find the year of manufacture for a Johnson outboard, the model number, (rather than the serial number), is used.
Mercury Marine has recommended 87 octane fuel in their outboards. While the engine may well run on a lesser octane fuel, I would personaly err to the side of a higher rated fuel.
150 octane Avgas (no longer used) 100LL Avgas 98 octane premium leaded (no longer used) 95 octane unleaded 82 octane regular (no longer used) 80 octane Avgas (no longer used)
I have a 1980,115 Johnson Outboard on a Very Heavy 16ft Crestliner Fiberglass boat,I can get it up to 62kms per hour with 4 people in it .(I used a GPS to test this )