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Power Boat Forum


Need to know gass/oil ratio for 70's johnson 100hp

Anonymous user

05 June 2007 15:34:39

Joined: Unknown | Posts: Unknown

I recently purchased an old boat with a 100hp johnson outboard. I believe it is from the early 70's, it is there 50th anniversary series. I cannot seem to find anything on the motor stating the gas/oil ratio and I would like to know what a standard mix ratio would be for a motor of this kind. Thank you
Michael
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Re: Need to know gass/oil ratio for 70's johnson 100hp

Anonymous user

24 June 2007 07:54:09

Joined: Unknown | Posts: Unknown

its a 50:1
5 gallons of 87 to 12.8 ounces 2 stroke oil.
i have the same engine.

do u happen to know the year of the engine?

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Re: Need to know gass/oil ratio for 70's johnson 100hp

Anonymous user

27 June 2007 23:30:15

Joined: Unknown | Posts: Unknown

Its a 72'
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