Which way should the line be fed clock or counter clockwise. Spins clockwise.

Can you move the inner drum up/down/left/right without the outer drum moving in total unison?

counter clock wise is loosen. clockwise is tighten

It is spinning around because one of the rotors is not spinning at full speed. This happens when you bump a spinning rotor against something. Determine which one it is by observation or logic (i.e, the one that turns clockwise will produce counterclockwise torque, which is to be balanced by the other rotor spinning counter clockwise. So the counter clockwise spinning rotor is slow) Tighten the screw that holds that rotor that is spinning more slowly. Use the screwdriver that came with the spare parts.

looking from the left side, the crank spins counter clockwise.
I'm intrigued how you would turn it backwards, if you touch the starter or kick start, it is going to go the correct way. If the tensioner is working it shouldnt slip anyway

You should wind it in the opposite direction of the head spin during operation.
Jim

its a regular right hand thread so counter clockwise to remove, clockwise to install.

They can be a real bear to get off. An impact wrench is usually required.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Counter-clockwise as viewed from which end? The correct direction as viewed from the right end would be counter-clockwise. As viewed from the left end it would be clockwise. In other words, when using the grinder from the front, the surface of both wheels should be going down. If this is not the direction it turns, take it back. Good luck, Al K

B & S only makes one motor that turns CCW and it is Diesel.

clock wise should pull light up. counter clock wise should tilt down

When installing new belt the belt comes off the right side of the drum and through the idler and around the motor shaft, then up the left side