Question about Craftsman 27cc 2Cycle Full Crank Curved Shaft Weedwacker Gas Trimmer ()

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Looking for a parts, specs for a craftsman weedwacker need to know the fuel/oil mix ratio for a 26.2 craftsman weedwacker. model no. 258.796131

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25:1 fuel:oil ratio.

Posted on Feb 15, 2011

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My craftsman weedwacker 27cc curved shaft wont start and cant figure it out


I need to ask. Did you leave fuel mix in it for a long time? If so then the carburetor will need to be cleaned with a special cleaner. and not the spray can stuff.

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This small engine needs a 40:1 ratio. Use only 2 cycle oil, not motor oil. If you are mixing one gallon of fuel use 3.2 ounces of the 2 cycle oil. This should give correct mixture so you do not get lots of smoke when you start. Take the time to measure. Note: there should be a marking somewhere on the engine about the mixture.

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Check age of gas. Cannot be more than 30 days old. Make sure to use fresh gas w/synthetic 2-cycle oil @ 40:1 ratio (1 gal.) Gas to 3.2 oz. Oil). Do not use old or stale oil/gas mixture. Always use the proper oil/gas mix. If you do not, your engine will suffer rapid, permanent damage. May need to clean or replace carburetor.

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Check age of gas. Cannot be more than 30 days old. Make sure to use fresh gas w/synthetic 2-cycle oil @ 40:1 ratio (1 gal.) Gas to 3.2 oz. Oil). Do not use old or stale oil/gas mixture. Always use the proper oil/gas mix. If you do not, your engine will suffer rapid, permanent damage. May need to clean or replace carburetor, fuel lines, and fuel filter.

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Need to know the 2 cycle oil to gas ratio for a craftsman 32cc weedwacker trimmer


My Craftsman 31cc 2-Cycle Gas WeedWacker Model C216.51318 manual calls for a Fuel Mix (gas:oil) of 32:1

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Most units call for a 40:1 fuel/oil ratio. That is 3.2 oz oil ( I recommend synthetic) to 1 gallon of gas. Some newer models may even recommend 50:1 to meet the more stringent EPA emissions standards (esp. in Cal.) buy you can't go wrong with the 40:1 mix.

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I have a gas operated 31cc Craftsman model number 316.798221 weedwacker trimmer 17 I mixed fuel with 2 cycle engine oil using a 4 to 1 ratio. The trimmer no longer starts. It seems as if it is about to...


If you have mixed your gas and oil to a 4 to one mix you have way too much oil in your gasoline. Drain out your fuel tank and carburetor. ----------------------------------------------------------------------------- Remove the spark plug and clean if necessary. Mix your fuel in a fuel container at 40 to one. Some sites even recommend a 50 to one mixture. (50 to one mixture is one pint of oil to 6 gallons of gasoline) Refill your fuel tank on the trimmer and try to crank, if it does not want to crank within 4-5 pulls then you may want to give it a very small shot of starting ether in the carburetor intake and try to crank again. Good Luck, I hope this helped, Please rate me, Thanks

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Need to know oil to gas mix ratio for Craftsman 32cc, 360 cfm, 170 mph blower vac? Can someone provide ratio?


40:1 is the standard mix. Go buy one of the little containers ( 3.2 ounces) of 2-cycle oil and mix it with a gallon of gas in an approved container (like a gas can). How you mix it is, pour some gas in the container...about 1/4 of the gallon, then pour in the oil, mix well, by shaking the can then add the remaining gasoline and PRESTO, you have a 40:1 mix!

Nov 08, 2009 | Garden

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I need to know the gas mixture ratio for a craftsman weedwacker


Hello mcguilmd:

>>All Two Stroke Engines will use a 50 to 1 Ratio using Today's Two Stroke Oils. I once had an Old Chainsaw probably from the 1950s, maybe Earlier 70s that had a sticker on it that said to use a 25 to 1 Fuel/Oil Ratio, but that would have been using Two Stroke Oils of the Time Period the Chainsaw was Manufactured. I was having a Problem with Oil Coming Out of the Muffler and Started Decreasing the Oil in the Gas. I Reduced the Oil Until it was a t a 45:1 Ratio and Decided to be Safe, I would Use a 40:1 Ratio Mix. In that Chainsaw I used 50 to 1 Ratio with no problems. Today's Two Stroke Oils compared to Yesteryears are more Efficient at Lubricating. It is like comparing Today's Synthetic Motor Oil to Motor Oils of Decades ago. All the Equipment I use in Landscaping, anything from a Weed Eater, Leaf Blower, Chainsaw, Hedge Trimmer, use 40 to 1 ratio, and I use all types of makes and models, Stihl, Homelite, Husqvarna, Shindaiwa, and Echo, Sears. I mix up a 5 Gallon Fuel can and use it in all of the Equipment for my Customers and for my Landscaping. I like my Fuel/Oil Ratio a Little Heavy, so I use a 40:1 Ratio. The Following was Copied and Pasted here from and MTD E-mail to me when I Asked for the OEMs Suggested Mixture for this Unit. The mixture, as described by the engine manufacturer, is a 50:1 ratio when using the approved types of 2-cycle engine oils.
50:1 ratio is a mix consisting of 2.5 ounces of 2-cycle oil per 1 gallon of gasoline.
The 2-cycle oil used should be approved and have one or more of the following specification titles: NMMA TC-WII, TC-W3, JASO FB, or JASO FC. NOTE: If unsure of the 2-cycle oil specifications, or the oil is not approved, use a 32:1 fuel to oil ratio. This ratio consists of 4 ounces of oil per one gallon of fuel.
NOTE: Always mix 2-cycle fuel oil and fuel in an approved gasoline safe container prior to filling the engine. Make sure to use a separate gas can for this 2-cycle fuel mixture and label it accordingly. Keep in mind that the fuel capacity of these engines normally is less than a gallon, therefore you will have to use this extra oil mixture for multiple fuel fills. Adding a fuel stabilizer will also help to increase the shelf life of fuel.
>>I Suggest Using a 40:1 Ratio and if Oil Starts Coming Out the Muffler then go to a 50:1 Ratio.
Please, Do Not Hesitate, If I Missed Something or you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

May 13, 2009 | Craftsman Garden

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