Jonsered 621 question

[Brad Thompson]

I am just about done rebuilding a 621 that my father has had since the mid 70's. George Blake sure knows about the old Jonsereds.  He sure has helped me get what I need. I don't have a manual for this saw so what should I set the low and high idle jets at?  Also, what mix for the fuel?

I also own a 920 and that is an awesome saw!  It gets heavy after using it all day, but it sure does cut the wood.  

I sure would appreciate any help with the 621 so it runs a long time.

Thanks.

Brad

[Kevin]

mix is 40:1 using Jonsered oil.

One turn out from a lightly seated position on low and high speed screws.
Final tune with warm engine, make sure the air filter is clean.