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Does my Murray M2500 weedeater use 2 stroke oil or 4 stroke mixed in the gas?

Posted by Anonymous on

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Posted on Jan 02, 2017

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SOURCE: do i have to mix 2 stroke oil on the gas for the 4

DO NOT mix oil in the gas on your four stroke engine. You will foul the spark plug(s), build up deposits on the valves and head, and make a smokey, smelly mess. A two stroke engine uses the fuel/oil mix to lubricate the engine before being used as fuel. A four stroke engine has a separate lubrication system and does not normally burn any oil. As the name implies, a two stroke engine works in two strokes. The first stroke is downward, where the fuel/oil mix and air are drawn into the cylinder. The momentum from the crankshaft counterbalance or force from the other cylinder(s) drive the piston back up compressing the mix, and the spark plug sparks at or slightly before the top of the stroke. The rapid combustion of the fuel/oil/air mix drives the piston down, which is the power stroke, and then the cycle starts all over again. A four stroke engine has an intake stroke down taking in the fuel/air mix, a compression stroke up, a power stroke down as the fuel/air mix is ignited at or before the top of the stroke, and a exhaust stroke up before starting all over again. A four stroke is much cleaner and more reliable than a two stroke, but it is heavier and has less torque. A two stroke engine is much lighter and has more torque, but takes more maintenance.

Posted on Feb 28, 2009

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1 Answer

Do I use reg gas or a gas mix?


Matt, If engine is two stroke and not oil injected then yes you must mix 2 stroke oil and fuel. 4 stroke engine have a crank case which is filled to proper level with 4 stroke engine oil. Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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http://www.cottagetips.com/tips/boat-motor-gas-to-oil-ratios

Apr 15, 2016 | Boating

1 Answer

Oil petrol mixture for Rockwell 26cc weedeater


Two cycle engines run on a mixture of gasoline and oil. Each engine type is designed to run on a specific gas-to-oil mix ratio.
IMPORTANT: Use only oil that is labeled for use in "Two-cycle" or "Two-stroke" engines. Home Depot and other stores now have "premixed fuel" of gas and 2 cycle oil.
To mix two-cycle fuel, start by putting correct amount of oil in gas can. Then slowly add correct amount of gasoline. Do not try to mix gas and oil directly in gas tank of equipment.

IMPORTANT: Do not use any fuel that is over 30 days old. Do not mix more fuel than you are likely to use in a month. Old fuel can gum carburetors and prevent starting. Always use fresh fuel.

The chart below shows correct amount of oil per gallon that each mixing ratio requires. Expect that yours will be between 32 gas to1 oil and 50 to 1. 32:1 and 50:1 are most popular.
Ratio GAS:OIL UNITED STATES OIL per 1 U.S. GALLON Gasoline
(128 oz.)
*INTERNATIONAL OIL per 1 IMPERIAL GALLON Gasoline
(160 oz.)
*INTERNATIONAL OIL per 1 LITER Gasoline
(metric)
32:1 4 oz. 5 oz. 31.25 mL 40:1 3.2 oz. 4 oz. 25 mL 50:1 2.6 oz. 3.2 oz. 20 mL

Jan 01, 2015 | Weedeater Garden

1 Answer

Should I use 2 stroke oil or synthetic 2 stroke oil


Synthetic oils claim to extend the shelf life of mixed fuel. If you are going to use the fuel within 30 days of mixing use regular 2 stroke oil.

May 22, 2014 | Weedeater Featherlite Blower 18 Cc 150 Mph...

1 Answer

Murray m2500 won't start after one day of having it


bad coil in it, i had bought a m2500 murray weedeater from walmart .did same thing i replaced the coil. bad when you buy something from wal mart and have to get it fixxed before you can use it. now it works fine

Apr 23, 2013 | Cars & Trucks

1 Answer

How do you drain gas from a carburetor


If oil and gas mix. It not hurt anything. It will mix with the full tank. May smoke a little.

Mar 20, 2012 | Murray Garden

1 Answer

What is the fuel mix for a 128cd model weed eater


A good fuel mixture ratio for any 2 stroke weedeater or chainsaw is 50:1. That equals out to 2.6 oz of oil per gallon of gasoline. Most 2 stroke oils can be bought in pre-measured containers at hardware stores or small engine dealers. It is best to not mix more than 2.5 gallons at a time. Hope this helps, Daniel.

Sep 14, 2011 | Husqvarna 28cc Gas Line Trimmer

1 Answer

My Ryobi 700R "EZ" weedeater smokes excessively.


Check the fuel/oil mix ratio you are using. Some Ryobis use a 32:1 mix and some use a 40:1 mix. There isn't much difference there. To be on the safe side, if you machine is possibly running or tuned a little "lean" I would start off with about 4 oz/gallon oil to gas mix. Use synthetic 2-stroke oil also. Your machine will perform much better.

Nov 27, 2010 | Ryobi Garden

4 Answers

I guess he needs to know what kind of oil he needs also


you shouldn't need to mix oil with gas on a four cycle engine. this is for two strokes.

Aug 23, 2009 | Garden

1 Answer

Do I just fill up my petrol strimmer with petrol, or do I have to put in some two stroke oil as well?


yes 2 stroke in weedeaters, trimmers, etc, look on the cap, or sticker and see the gas/oil mix ratio

Jun 07, 2009 | Garden

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