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Posted on Oct 05, 2009
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Want to know what the gas / oil ratio is on a 1973 4 hp mercury motor. s/n 3657708

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  • Posted on Oct 05, 2009
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The fuel ratio is 50 to 1. Fuel/oil.You can go as low as 40 to 1 fuel/oil.40 to 1 is the richer mix.Hope this helps

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Mercury 1989 60 HP Outboard Motor manual to find gas to oil ratio

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I have a 1964 mercury merc 850 85hp boat motor.

I have the same motor, and the original manual.

The mixture is 50:1. Everything else will destroy your motor. Mercury has a toll free number, call there in case you still have doubts.
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I need to find out gas to oil ratio on 6.5 hp craftsman lawn mowe

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