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! quart of 2-stroke pre mix oil would be fine for 6 gallons of gas.

Posted on Apr 26, 2017


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Posted on Jan 02, 2017


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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
for a better answer , talk with an evinrude service center who should have a chart listing your motor
units with oil injection are 50: 1 ratio and others are 6 gallons to 1 pint of oil which is around 45:1
I would seek advice from an evinrude service center for the correct fuel to oil ratio for your engine
to mix the fuel , put the oil in first then the flow from the bowser will effectively mix it up to start with
then fit the cap on the tank and shake it up yourself

Apr 20, 2017 | Boating

1 Answer

Evinrude outboards

Johnson and Evinrude carbureted 2-stroke outboards since 1964 require a 50:1 fuel to oil mixture (2%) on engines without an automatic oiling system - 6 gallons of gas to 1 pint of outboard oil.

Aug 30, 2014 | Garden

1 Answer

Evinrude motor problems

clean the carb jets etc and check fuel pump diaphrams not hard or perished ! balance the carbs also !

Aug 05, 2014 | Sierra Outboard Starters Johnson/evinrude,...

2 Answers

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

50:1 since the late 60's
Too much oil will gum up the rings, smoke too much and foul plugs. Use ONLY major outboard manufacturers oil, Mercury, Yamaha, Johnson/Evinrude TCW-3. They work the best, and no alcohol fuel.

Jul 11, 2014 | Sierra International 18-3090 Marine...

3 Answers

How do i replace the water pump in a 2005 150 hp evinrude outboard motor

Take the cowling off. Also drop the foot. There wil be a stainless linkage rod that runs the length of the motor that you will have undo to drop the foot. The water impeller will be inside a stainless casing that you will have to disassemble.

Aug 17, 2012 | Boating

2 Answers

I have no spark on 1989 7.5 evinrude outboard motor

Hi have you tried it with the stop switchl/button disconnected, if so you have only got the stator under the flywheel left to replace, regards Phil.

Jun 04, 2012 | Boating

1 Answer

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,...

The correct mixture is 50:1, or 1 pint per 6 gallon tank. Use quality brand-name outboard TCW-II or better oil(Bombardier or Mercury eg.) to eliminate the oil as a problem.

Check your plugs for fouling. If using perma-gap / surface-gap type plugs, switch to the L77JC4 type, especially for long idling or slow speed operation. For extended high speed operation, the surface gap plugs are recommended.

Jul 12, 2011 | Clymer EvinrudeJohnson Outboard Shop...

1 Answer

6hp Johnson outboard stalls & quits

go to an auto parts store and get a can of gasoline additive called seafoam. Read the label so you know how much to add to your 6 gallon tank. This stuff works wonders on outboard motors.

Sep 16, 2009 | Boating

2 Answers

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

Jan 04, 2009 | Boating

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