I have had a 257 for about 12 years. When I bought the chainsaw the dealer gave me some training on haw to operate
the saw. I always remember what he said:-
The chain is really the heart of the saw, if possible always lightly sharpen between fuel refills.
Starting a Husky can be a real ***, always follow this procedure:-
First choke, pull till the first misfire, de-choke and then pull to start.
This works for me, I don't use the decompression valve and never the throttle before it's running.