Question about Clymer Mercury/Mariner 2.5-60 HP Two-Stroke Outboards Includes Jet Drive Models 1994-1997

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What is fuel to gas ratio for a mercury 4 hp outboard motor?

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2 cycle, 50:1

Posted on Jan 02, 2015

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Fuel to gas???
If you mean fuel to oil it's 100 on 1...
Use only TCW3 2-stroke oil!

Posted on Jun 25, 2015

  • phillipelecu
    phillipelecu Jun 25, 2015

    I do not know where you live but in the US, the ratio is 50:1 and I agree only TCW3

  • phillipelecu
    phillipelecu Jun 25, 2015

    Premix in the tank.

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Where might I find a working fuel pump for a 1966 Mercury 3.9 hp outboard motor?


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2 Answers

What is the oil to gas ratio in my 4 horse Evinrude< Model # E4BRHCOB Ser # B101702


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Fuel mix ratio for outboards


that depends on the age of the motor .if erroring it's better to have too much oil than noot enough sine that can seize an engine up

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Fuel ratio for 1968 mercury 9.8 outboard


The fuel ratio is 50/1. Eg.50 gallons of fuel to 1 gallon of oil.
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5 Answers

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


I have the same motor, and the original manual.

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Fuel oil mixture for 1986 mercury 115


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