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Posted on Aug 16, 2009
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I have a mercury 25, 2 stroke, need to know what type of oil and the ratio of oil to gas

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  • Posted on Aug 16, 2009
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I would use Mercury 2 stroke oil...it comes in a black bottle with a red label. Also you can use Quicksilver brand...that is made by Mercury but marketed to sell to stores like Wal Mart. If you are breaking in a new or rebuilt engine then you mix 100:1 for the first two tanks. Any normal application you should be running 50:1 all the time. Keep in mind that I have been to Mercury School and this is coming straight from the horses mouth. No matter what it says on the tank, or what anyone else tells you...you should always be running at 50:1 unless you are in the break in period of the engine.

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that is 20 mils of 2 stroke oil for every 1.0 litre of petrol that you mix

so if you want to make 2 litre mix use 40 mils of 2 stroke oil , then add 2 litres of petrol only and give good shake

note use good quality 2 stroke oil , such as sthil or husqvarna oil from your outdoor power shop


but if using general 2 stroke oil from a garage use 40 mils of oil for every 1 litre that you mix
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cheers hope this helps
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Confused a little
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