In my part of the world, break in is 25.1 then run 50.1. Back to mercury school for a refresher course.
SOURCE: what is the correct fuel/oil mix for evinrude 4hp ?
the proper mix is 50 to 1 or 16 oz to every 6 gallons,in my little boat I put 4 quarts in the 48 gal tank and its been running for 22 years,your running way to rich and your plug is probaly fouled,take it out clean it up/dump your fuel and mix it right,thats a great motor you got,I hunted with it for years,oh yeah when you get started run it till all the smoke is gone or you will have carb problems ,if you dont have them all ready,a little carb cleaner wont hurt but get it running first,or all that trash will foul you out,have a great trip bartriley1
SOURCE: I have a mercury 25, 2 stroke, need to know what
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.
SOURCE: fuel ratio for 1968 mercury 9.8 outboard
The fuel ratio is 50/1. Eg.50 gallons of fuel to 1 gallon of oil.
On an older motor and newer cleaner burning oils,you may bring that down to 45/1.Hope this helps
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