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51.4cc
If it's an 066 go 1 turn out from seat for high and low. No 064 to my knowledge.
If everything else is clean and working, try turning gentle the HI LO screws clockwise till the end and then unscrew 1 and 1/8 back! That should do it!
How many cc in a Stihl chainsaw
turn in then 1 1/4 turns out on high and low factory settings hope this helps
Stihl make their own chainsaws
remove the cover plate from the back of saw right above the throttle trigger remove air filter and you will see your carberator
The Stihl 064AVE was introduced on 1986.
The Stihl 064 is a 84.9cc chainsaw.
A Stihl MS 290 Farm Boss chainsaw costs around $370. This is Stihl's most popular model of chainsaw. It weighs about 17.4 pounds and has 3.8 Horse Power.
Chainsaw carbs are very picky and have to be set just right. As you are obviously not familiar with them, you should take it to you local lawnmower and small engine shop.
70cc