Blender-wacker, A gas powered blender with electric start.

Step 8 Starter

Next I welded the bike sprocket to the drill motor's output shaft. I turned the original keyless chuck down until it snugly fit, then tack welded it in a few places.

I guess I should add that I removed the slip function or clutch part of the drill. Mostly to reduce the size. It had springs that press on ball bearings and allowed the outer sun gear to spin if the drill torque exceeded an adjustable set point. I just removed the bearings and threaded a well fitting machine screw in each hole where the spring went to stop the sun gear from being able to slip.