Question about Homelite Mighty Lite Lawn Trimmer

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My MightyLite 26cc trimmer won't start. It has fuel and a brand new spark plug. It's only 1 year old and I've always had problems starting it and keeping it running. Any ideas?

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The possible reason it has always been hard to start is the way the settings on the carburetor were initially made at the manufacturer. Elevation and climate affect these sensitive carburetors but the lower grade manufacturers use a "default" setting on the carburetors. I would say a small carburetor adjustment and mild cleaning (if it has sat unused any length of time) will help the starting issue. Try adding a 1/2 ounce to 1 ounce amount of fuel system cleaner into your 2 stroke fuel can. I recommend Chem Tool Berryman B-12. It has the necessary ingredients to help clean built up gum and varnish in the carb and in the engine. The recommended rate is 1 ounce per gallon of gas, so use about 1/2 ounce in a gallon or 1/4 ounce in a half gallon.
As far as adjusting the L and H mixture screws on the carburetor, first you have to be able to get ahold of them. They are made so you can't. I use a small automotive type plastic wire connector tapped down onto the head of the screw so I can then turn it. I know the heads aren't slotted, or are splined or are D-shaped. I suggest resetting the carburetor adjusting screws to alleviate a hard start issue and a mild cleaning of the carb (through it's own fuel system) to aid in cleaning it up. Here is the manufacturer's suggested methods for setting the mixture screws on your carb.
http://www.zamacarb.com/tipspage.html

Posted on Apr 09, 2011

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One small two-stroke engine, the spark plugs becomed gummed quite fast. It is a recommended maintenance procedure to replace them yearly. This is often neglected.

I would recommend replacing the spark plugs, it is cheap to do so and should be done regardless.

Another suggestions is to check your fuel mixture. Ensure that you are using the correct mixture of fuel and oil. Too much oil can hinder the detonating ability of the fuel and make it harder to start.

IF the trimmer was stopped VERY suddenly by jamming or stopping the trimming end, you may have damaged the starting mechanism.

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