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20 in. Bar
20 inch upto 25 inch
An 18" or 20" bar would be ideal on a Stihl 041 http://store.chainsawr.com/
mine uses a Bosch ws7f
The chain is referred to a 3/8" extended pitch. In Oregon it is a 91, in Stihl it is a 63.
The 066 is the only size that Stihl does NOT make a carrying case. It is too high and too wide for the standard case. In addition, it has a 27"+ bar and most cases can only handle up to 24".
If you have a stock Husqvarna 345 with .325 pitch chain you would need a 3/16" file. http://store.chainsawr.com/
I have an 034AV Super and it came stock with a 20" bar. An 034 isn't quite as powerful (56.5cc vs 61.5cc), but a 20" bar should still work great on it.
The 034 takes either a .325" or 3/8" pitch chain. My guess would be 3/8 .050 go to chainsdirect on eBay chose the chain for youre bar size.
Depends on the Model of stihl trimmer you have. The 45 home trimmer from stihl takes .080 but from that model to the larger more expensive ones the string size gets larger.
A chainsaw can be measured by Engine size or Bar length. Both are important to the weight and cutting applications
A STIHL 045 av is 75cc and the max recommended bar size for it is 32". However... If you have a 045 av Super then it would be 87cc and the max recommended bar length would be 36". So it depends if you have a SUPER or not. It is easy to tell as it will say SUPER on the top tag right below 045 av.