'Chainsaw Husqvarna' actually refers to the Swedish manufacturing company Husqvarna, which manufactures a line of chainsaws and other construction tools. The reference 'chainsaw husqvarna' in the question above is not an accurate or correct term.
25to1
Some places where one can find parts for a Husqvarna Chainsaw include the websites Partstree, Lowes, and eBay. One can also find and order parts through a Husqvarna dealer online.
You can get the owners manual from Husqvarna.
Partstree, Lowes, and eBay
ansummers
50:1
13500 max no-load rpm
40:1
The Husqvarna 455 Rancher chainsaw is listed for sale all over the internet for about $329.99. The Rancher is the ideal chainsaw for a landowner who needs a high powered, heavy duty saw for all cutting conditions.
Go 50:1.
50"1 with the proper oil
That would depend on where in the world you lived. But if you contact Husqvarna headquarters in Stockholm, Sweden, they will tell you where YOUR local spares outlet is to be found.