Chainsaw Repair

Possibly smoking is just the nature of the beast?

But this engine should have the needles set so the engine makes a fluttering sound just to pull the trigger and speed it up out of a cut.

When you stick the chain in the wood and the chainsaw starts cutting, the fluttering (4 stroke) sound should suddenly stop and the engine break into a smooth two stroke sound as it is cutting. If you lift up on the chainsaw, the four stroke fluttering should return. This is when the high speed needle is set correctly.