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What is the correct fuel/oil mix for evinrude 4hp ?

I have an older Evinrude 4hp outboard, which is running but seems to get pretty blackened. I'm running it on 25:1 mix (petrol: marine 2-stroke outboard oil) at present.

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  • Anonymous Mar 27, 2014

    year of make

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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

Posted on Jan 05, 2009

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Hi, I just bought a 1986 outboard boat , Evinrude 60HP , what kind of oil should i be mix ( how to mix ) to get starting , is the NGK spark plug B9HS right to use for this motor ? it look new .

Posted on May 26, 2010

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2003 2 stroke evinrude 225 hp outboard will run at high speed about 5-7 min than starts shaking seems like not all cylinders are firing. if i shut off the motor and restart it will run another 5 min.


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I have an Evinrude 7.5hp outboard motor.Mod# 8RC1A SN# 0178194. What Year of manufd? How to mix fuel & what octane fuel to use & what oil to use? Help me go fishing, thanks.


91 octane rating ( no e-mix fuels ) and proper outboard oil ( not normal engine oil)
outboard oil has a property that allows the oil residue to stick to the metal bits and helps prevent rust
e-mix fuels absorb moisture and and rusts out steel tanks , destroys rubber components and corrodes aluminium components
the model you have is not listed on any 7.5 hp engine from 1950 to 1958
model number starts at 4434 to 7512 to 7525 in 1958
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then fit the cap on the tank and shake it up yourself

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I have a 1985 Evinrude 60hp outboard that i removed the oil injector so as i could run on mixed fuel. At high speeds it is bogging out and seems to be missing badly. Could this be the wrong fuel/oil mix,...


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Pull the rope starter.
Should start easily.

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