Question about Oregon Scientific Complete Carburetor for Stihl 4122 Brush Cutter and 4226HS Hedge Trimmer

1 Answer

Where is the idle adjustment screw on the stihl model 170 saw?

The owners manual says the adjustment screw is thru a hole on the side of the handle. But the hole in the handle doesn't line up with hole in the saw. I took off the handle and found out the adjustment screw is not where the manual says it is. Where is it? please help.

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  • dontbother10
    dontbother10 May 11, 2010

    I tend to over simplify things. Why not ask the folk that make your saw? Stihl Contact Ushttp://www.stihlusa.com/contact.php

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Posted on Aug 13, 2010

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1 Answer

How? do i adjust the idling on my chainsaw


Generally you will find 3 small holes or slots on the pull cord side of the saw you will need a small enough slot screwdriver to fit through the holes. Depending on the age of the saw there will be a low speed adjusting screw a high speed adjusting screw and the idle set screw to establish which is the idle set screw remove the air filter cover from the top of the saw then the air filter you should be able to see the carburetor at this point, the screws should be on the left from the rear or handle end of the saw. The screw you are looking for should have a small spring on it and it should pass through an aluminum post and come against a metal lever of sorts on the top of the carb. When the screw is turned to the right the saw RPM should increase to the left should lower the RPM. When the RPM is lowered and the saw wants to stall the low speed screw will need to be adjusted. the low speed screw should have a blue plastic rotation stop on it and you may have to remove it to adjust the low speed adequately.
There is a new fuel made for 2 cycle engines that has a 50 to 1 rating and it cleans the carb and the internal saw parts. It's biodegradable and does not go stale in the saw. It's an amazing product. you should be able to get it at a chain saw dealer.Expensive but worth every penny. It comes in one ltr. or 1 gal. containers. Tune up in a can so to speak.
Hope this helps

BR

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1 Answer

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#2) Hold the blade in Vertical position in your right hand. The "Oval" hole is on top. The teeth is facing your left hand. You will see that the "oval" hole on the top of the blade is a "horizontal" oval.

#3) Hold the saw (handle) in your left hand as if you were going to saw using your left hand.
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#4) Hold the blade using your right hand. Oval hole on top, teeth facing your left hand. Insert
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1 Answer

Chain fell off and I can't get it back on.


Turn the saw off. Look for several nuts on the right side of the saw that hold the cover on and the blade to the saw. Loosen these nuts, and before taking the cover off, loosen the chain adjuster by turning it (usually a screw head on the same side, or on the front of the saw as you look down the blade towards the saw.) Loosening the chain adjuster moves a pin that goes into the bar (the part the chain rides around when operating) to push it away from the saw to tighten the chain when you are tightening it. Take the cover off, and put the chain around the sprocket at the back like a bicycle chain, and then while holding the bar (sometimes a partner helps) parallel to the saw and outward away from the front of the saw, align the bottom parts of the chain inside the bar guide slot all around the bar, holding just enough tension that it doesn't fall off the sprocket or get misaligned in the bar guide. Try moving the chain a little bit to make sure it is not binding on anything. If it doesn't move at all, make sure the chain brake is not on. Once it is moving smoothly, put the cover back on, and begin to hand tighten the nuts. Just before they begin to get tight, eyeball where the chain tensioner pin is in relation to the hole it is supposed to go in. Adjust the chain tensioner screw to move the pin towards the hole. When it pops in the hole, continue tightening the nuts by hand until tight. Now you and your partner can let go of the bar. Adjust the chain tensioner for the proper tension in the chain, not too loose, not to tight, refere to your manual. Finish tightening the cover nuts using the universal wrench to the specifications given in the owners manual.

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1 Answer

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1 Answer

Trying to put chain and saw together


If the saw has a chainbrake make sure it is de activated by pulling the hand guard fully to the top handle, you should hear an audible clip when it locks, remove the the bar nut/nuts and remove the side cover, if the chain adjuster is in the cover screw it right back, if the adjuster is in the crankcase screw it right back, place the guide bar onto the bar bolts, loop the chain over the sprocket and lay it around the guide bar with the cutters on the top of the bar facing away from the saw, if the adjuster pawl is in the crankcase locate it into the adjuster hole in the guide bar, now re fit the side cover, if the adjuster pawl is in the cover make sure it locates into the adjuster hole in the guide bar, re fit the bar nut/nuts finger tight, screw the adjuster up until the chain sits snuggley around the whole guide bar, pull the chain around the bar manually with a gloved hand, this will make sure it turns freely and is correctly located in the sprocket, hold the end of the guide bar up and tighten the nut/nuts

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1 Answer

How do i replace my chain on my Partner brake assisted chain saw ?


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1 Answer

Hi I have a Husqvarna 350 chain saw that reaves way to fast almost to the point you think its going to blow up, thats when i chock it out to stop it. I have tried to make all the...


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http://www.makita.com/en-us/Assets/images/Products/_PartsBreakdowns/PB_2703.pdf
http://www.makita.com/en-us/Assets/images/Products/2703/owners_manuals/2703.pdf
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1 Answer

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