fuel requirements

basszzilla

Seaman
Joined
Feb 28, 2003
Messages
71
I have a 1989 mariner 90 horse. Would some one be kind enough to inform me to the correct fuel octane requirement for this motor. I live in Oklahoma and only use it when the temp is above 50 degrees. :cool:
 

rickdb1boat

Supreme Mariner
Joined
Jan 23, 2002
Messages
11,195
Re: fuel requirements

I would use regular 87 octane in that motor. Any higher is a waste and may promote carbon build-up, as it actually burns cooler than 87.
 
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