Outboard Propeller Guard How Can I Make An Outboard Motor For My Canoe With A Whipper Snipper?

How can I make an outboard motor for my canoe with a whipper snipper? - outboard propeller guard

I saw that protect outboard mixer Snippers and brush with a propeller, but they are very expensive. All ideas on how to do it yourself? We have problems with the design of the propeller and the force is not enough. What engine should I use?