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you can do it yourself with instructions from ehow.com. see below OR you can get it done at a small engine shop repair, where they fix the lawnmowers, slingtrimmers and chainsaws such as Makita, shtil or any other company that makes them. Hope this helps!
How to Sharpen Hedge Trimmer Blades
InstructionsThings You'll Need
Metal filer Eye protective goggles
Sharpen Your Shears
1
Place the hedge trimmers on a flat surface. Ensure that the blades are pointed away from your body.
2
Position a pair of pliers around the bolt on your hedge trimmers. Clamp the pliers on the bolt securely.
3
Twist the bolt counter-clockwise to remove it.
4
Separate the paired blades.
5
Hold one of the handles with the blade facing away from you. Slide a metal filer down the length of the blade until you reach the pointed end. Continue to sharpen the blade for a minute or two, and then do the same with the other blade.
6
Test the blades with a piece of paper. Hold a piece of paper next to the blade, and then try to cut the paper without using a lot of force. If the paper slices easily, then your blades are completely sharpened. If the blades do not cut the paper, continue to sharpen the blades with the metal filer, and repeat the paper test.
You do not have to remove the blades to sharpen. There is a good instructional video on sharpening hedge trimmer blades on youtube. The guy that did it is ereplacementparts i think.
You should be able to sharpen your hedge trimmer blades. There is a good video on how to sharpen hedge trimmer blades on youtube by ereplacementparts. He explains how to do it with a file or a grinder.
50:1 is 50:1 no matter whose 2 cycle mix you use. 50:1 is 2.6 ounces of 2cycle mix to 1 gallon (US) of gasoline. I recommend strongly to use a brand that contains fuel stabilizer. It will come in a 3.2 ounce bottle...still 50:1. The premium 2 cycle oils will be semi-synthetic or full synthetic and will claim "no smoke"
My trick is to make sure that I always lube the blades after each session with a 3/4 engine oil + 1/4 kerosene mix - making sure that every tooth gets a drops or 2, then run it for a seconds to spread the oil & leave the blades overlapping. Doing this allows the blades to self sharpen I've found. 2 stroke oil , unmixed is about the perfect viscosity aswell.
I use a dremel with a sharpening stone, if u don't have one you can also use a power drill with a small sanding disk (1 inch) and course sand paper (30 or 40 grit). or you can use a bastard file. its too tight to use any kind of angle guide so just take your time and do it by eye. it shouldn't take much to get them sharp enough to do the job, over-sharpening is unnecessary and dangerous, and will make the blades dull faster. sharpen all the free blades, top and bottom, then start the trimmers to advance the blades to free up the sides you couldn't get. i use a light penetrating oil to clean the blades first, then lithium grease spray to lubricate.
I use a dremel with a sharpening stone, if u don't have one you can also use a power drill with a small sanding disk (1 inch) and course sand paper (30 or 40 grit). or you can use a bastard file. its too tight to use any kind of angle guide so just take your time and do it by eye. it shouldn't take much to get them sharp enough to do the job, over-sharpening is unnecessary and dangerous, and will make the blades dull faster. sharpen all the free blades, top and bottom, then start the trimmers to advance the blades to free up the sides you couldn't get. i use a light penetrating oil to clean the blades first, then lithium grease spray to lubricate.
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