fuel to oil ratio

shadygirl

Recruit
Joined
Aug 9, 2008
Messages
1
just bought a 1999 pontoon with mercury marine 90hp 2-stroke need to know the gas-oil ratio please help
 

Dunaruna

Admiral
Joined
May 2, 2003
Messages
6,027
Re: fuel to oil ratio

50:1 is a safe bet for the vast majority of 2 stroke outboards, including yours, but you should have oil injection in which case the ratio is variable and automatic. Is the oil injection disconnected?
 
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