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

Step 5Another mock up

Another mock up
I think this gives you a good idea of what is going on. The drill motor turns the sprocket that pulls the chain that spins the motor to crank it. The one way gear action on the BMX bike allows the motor to turn without pulling the drill motor with it after it cranks.

The chain attaches to the motor shaft before the clutch. The original weedeater clutch engages when the motor reaches a certain RPM and allows it to sit at idle without spinning the blender blades. It also has a female square input shaft that almost matches the blender's input.

The expanded steel messes with picture taking a bit so it's hard to get a good visual.
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Author:stubman