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My stihl.Ms 441 smokes from the little ports on the front of the muffler why is this I mixed my 5 gallon stihl 2 cycle oil mix with exactly 5 gallons

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  • 2,069 Answers

It's a 2 cycle engine..it should smoke.

Posted on Dec 11, 2012

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Posted on Jan 02, 2017

dontbother10
  • 2220 Answers

SOURCE: port in front for oil and the back is for gas and mixture

Hello Andre;
I think you are saying you put oil/fuel mix in the oil tank and bar oil in the fuel tank; discovered your mistake drained both tanks and refilled with the correct fluids. Now the saw runs but smokes excessively. I think it will do no lasting harm. After you have run a few tanks of the correct mix (50:1) through the saw. Remove and clean the muffler and spark arrestor, reinstall them. Inspect your plug if any evidence of fouling replace it. I think you will be cutting with this saw for years.

Yes the additional smoke is caused by a very oil rich mixture and should abate with each fresh tank of fuel. If the chain is not moving ensure the chain brake is not engaged.

If you have more questions or need additional help please reply below and I will get back to you. Good Luck. HTH
Lou
Thank You for using FixYa.

Posted on Apr 23, 2010

Testimonial: "Thanks a million Andre"

  • 178 Answers

SOURCE: what is the correct mixture

50:1 is the correct mixture. Every company has an oil they would perfer you use. Namely, the one they make. I would imagine that if it ran perfect before you put that premix in there, the premix is your problem, assuming no one "borrowed" it and straight gassed it. It also sounds like once it gets warmed up, it begins to fail. I would do a compression test once it gets warmed up. Also, you could pull the spark plug, grab a flashlight, and see if you notice any scoring on the cylinder.
Here is a link for the manual, in case you lost yours.

http://weborder.husqvarna.com/order_static/doc/ZOUS/ZOUS2000/ZOUS2000-EB7000-0005.pdf

Posted on Nov 24, 2010

barterjoe
  • 338 Answers

SOURCE: keep burning up piston on

It sounds like you are running lean. Not a lean oil/gas mix but a lean Air/fuel ratio. This engine runs hot as a high performance engine. any air leaks such as crank seals, manifold gaskets or muffler gaskets can give you too much air for the fuel coming in.

Secondly from the fuel side:
Ethanol (curse it) combines with oils that have no nondispersants making a white chalky poweder in the fuel system causing less fuel to mix with air. any blockage or pin hole leak can cause less fuel to be brought into the engine thus less cooling and lubricating.

Your carburetor and fuel filter need to be serviced and adjusted correctly or they will affect the mix.

When done the engine should run no faster than 13,000 rpm top no load speed.
This engine should idle smoothly at 2,500 with no more than 150 rpm change

if the speed is not as listed above when the rebuild is done you need to go back into the machine.

Call up a shop like www.arcolawn.comto get a EDT8 tach. it is well worth the money.

good luck

Joe

Posted on Feb 12, 2011

al_kupchella
  • 843 Answers

SOURCE: what is 40-1 mix never

40:1 is exactly the same thing as 100 ml to the gallon. It;s just expressed differently. Put another way, 40:1 is 40 gallons of gas to 1 gallon of oil. Or 1 gallon of gas to 1/40 gallon of oil. 100 ml is very nearly 1/40 gallon. Good luck. Vote if you found this helpful. Al K

Posted on May 22, 2011

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Yours is not a current model and I did not find a manual. The following is an excerpt from a 26cc MightyLite Blower/Vac UT08550/UT08951 "Operator's Manual":
This product is powered by a 2-cycle engine and requires pre-mixing gasoline and 2-cycle lubricant. Pre-mix unleaded gasoline and 2-cycle engine lubricant in a clean 1 gallon container approved for gasoline.
Recommended fuel: This engine is certified to operate on unleaded gasoline intended for automotive use.
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1 quart fuel:3/4 ounces of oil = 1 Gallon fuel:3 ounces of oil or slightly less than 43:1. Not what a current manual recommends.

If properly adjusted your blower will operate fine on 50:1 regardless of what the manual reads. HTH
Lou

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Yours is not a current model and I did not find a manual. The following is an excerpt from a 26cc MightyLite Blower/Vac UT08550/UT08951 "Operator's Manual":
This product is powered by a 2-cycle engine and requires pre-mixing gasoline and 2-cycle lubricant. Pre-mix unleaded gasoline and 2-cycle engine lubricant in a clean 1 gallon container approved for gasoline.
Recommended fuel: This engine is certified to operate on unleaded gasoline intended for automotive use.
Mix Homelite Premium Exact Mix lubricant with gasoline according to the instructions on the package. If Premium Exact Mix lubricant is not available, use a high quality synthetic 2-cycle engine lubricant, mixed at 2.6 oz. per gallon (US).
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NOTE: Premium Exact Mix fuel mix will stay fresh up to 30 days. DO NOT mix quantities larger than usable in a 30 day period.
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If properly adjusted your blower will operate fine on 50:1 regardles of what the manual reads. HTH
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Your manual says 40:1.
I gallon of premium fuel to 3.2 ounces of quality 2-cycle oil.

I gallon of premium fuel to 3 ounces of quality 2-cycle oil (.Oz/quart) is about 43:1.

Purchase the pre-measured 2.6 ounce 2-cycle containers sold at most chainsaw outlets.
I gallon of premium fuel to 2.6 ounces of quality 2-cycle oil is 50:1.
Once adjusted with this mix your saw will start easier, plugs, pistons, and mufflers will take considerably longer to carbon foul. HTH
Lou

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Your manual probably says 40:1 (1 gallon of premium fuel to 3.2 ounces of quality 2-cycle oil) It will perform better, start easier, and take considerably longer to plug up the spark arrester if you adjust it and operate on 50:1 (1 gallon of premium fuel to 2.6 ounces of quality 2-cycle oil)

Fuel/Oil Mixture
  1. Use a quality 2 cycle oil and mix it to the OIL suppliers recommended ratio. Today I use Stihl 2 cycle oil mixed @ 50:1 in a Pioneer that I purchased new in 1980. There are no gouges or scratches on the piston or cylinder and I have no carbon build up on the piston top. The manual (on stone tablets) recommends 24:1. Over the years the mixture has leaned from 24:1 (Saw Recommendation) to 28:1 (Lawn boy mower recommendation) to 32:1 (Oil provider 2gal premium/8oz chainsaw 2-cycle engine oil - used for many years) and finally the last 5 (±) years 50:1 (1gal premium/2.6oz Stihl 2-cycle engine oil)
  2. Any fuel containing ethanol is not good with chainsaws. Mix what you expect to use within a few weeks. Anything over 1.5 months old use up in a 4 cycle engine. HTH
Lou
Like so much of what MrFixIt posts his opinion is based on BS. He can never take the time needed to provide any answer that actually requires thought or research!!! If you did not rate his answer please give it the NOT HELPFUL rating it deserves.

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