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.

Posted on Apr 09, 2011


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