The business card / thick paper / postcard or whatever is fine for the flywheel / igniter gap.
When Stihl machines are new, they immediately use a 50:1 mix using their own oil if possible, but any quality two stroke mix is fine......I use Oregon but increasingly leaning towards the Aspen ready mixed two stroke fuel. That's until the E10 petrol starts to make its mark.
Your piston and barrel are an unknown quantity so I would lean towards a 40:1 mix - fpr sure it'll do no harm.
Just screw the base on tightly, I have a kosher T handled Stihl driver for this but what you suggest will be fine. Tighten the screws up gradually and diagonally of course.
John
When Stihl machines are new, they immediately use a 50:1 mix using their own oil if possible, but any quality two stroke mix is fine......I use Oregon but increasingly leaning towards the Aspen ready mixed two stroke fuel. That's until the E10 petrol starts to make its mark.
Your piston and barrel are an unknown quantity so I would lean towards a 40:1 mix - fpr sure it'll do no harm.
Just screw the base on tightly, I have a kosher T handled Stihl driver for this but what you suggest will be fine. Tighten the screws up gradually and diagonally of course.
John