Undo the two nuts on the right hand side and remove that side cover. The rod which controls the chain brake automatically detaches from the chain brake handle.
When you have the side cover removed place the saw on its side with the pull cord downwards.
Lift the bar up towards you and off the adjuster. unhook the chain from around the bar and the small sprocket, this part is very obvious when you look at it.
Wind the adjuster screw back a couple of turns to give you some free play and then fit the chain in the slot in the centre of the bar, over the nose of the bar and then back towards the saw. Make sure that the sharp cutting edge faces away from the saw on the top of the bar and back to the saw at the bottom of the bar.
Fit the chain over the sprocket again and place the bar back in position, making sure that the lug on the adjuster fits into one of the two small holes on the bar.
Replace the side cover and fit the nuts finger tight. Pull the chain brake lever into position and fit the control rod back into the side of it. Turn the adjuster screw clockwise to tighten the chain correctly and tighten the side cover nuts. Make sure the chain brake is off and pull the chain around to ensure it is correctly seated. You are ready to go.
The fuel mixture for a Stihl chain saw is gas and oil.
The Stihl 064 is a 84.9cc chainsaw.
At your local Stihl dealer
Stihl 029 super 56.5cc 3.8hp
$100
The Stihl 023 is 40.1cc - 2.45cu.in. -weight 10.1 lbs. w/o bar and chain
Can I put a 18inch bar on a stihl
I believe 111cc's or 6.77ci's.
2-stroke gas powered saw w/ electronic ignition. 16-24" bar typical, can take other bars. High torque, lower speed saw, circa 1970's to 1980's. Considered obselete for parts and repairs, but many are out there if you hunt for them Correction: later models had electronic but were so labeled, earlier 031av had points.
Some Stihl chain saws have an adjuster underneeth the saw to turn up the oiler .
For a 20" Bar 325 Pitch .063 Gauge Chain 81 Links
Not satisfactorily. The 021 is a lightweight saw.