Most inland boats that are designed to wind through rivers and streams come with an outboard motor. Such motors cannot simply be strapped or bolted onto the boat, like an inboard motor. The implementation of an outboard mounting bracket is required. If you don't have one, it is relatively simple to make one yourself. The process itself requires a whole lot of concentration, but the simple materials and concept make it worth the hassle.
Put one large stainless steel board on the ground and bend the two sides by 90 degrees at the 5-inch mark. Drill six holes on the vertical sides with even spaces between each.
Drill six holes on one side of each of the medium-sized boards, spaced out so that they match the holes on the large board laying on the ground. Hold the boards vertically against the inside of the sides and drive some bolts through.
Drill two holes on each of the attached boards, one on each corner. Drill two holes on each of the stainless steel bars, each one 1 inch from the end. Drill two 1-inch holes through the middle of two of the bars. Bolt the two bars with only two holes on the farther two corners of the boards, and the other two bars with the three holes on the closer corners. Bolt it through one of the holes close to the edge.
Take your other large stainless steel board and bend it just as you had done with the first. Drill out the corners and bolt each corner to one of the four bars. Apply lubricant on the bolts holding the bars and check to make sure that you can move the board up and down.
Bend the aluminium pole twice by 90 degrees around 1/3 and 2/3 of the way across. Drill a hole 1-inch in diameter on the two ends, facing outward. Match these up with the holes on the two bars and push the stainless steel pole through. Weld the edges of the stainless steel pole and the bars together.
Hold your outboard motor against the bracket and drill holes where required. Drill holes on the backboard to attach to your transom.
Weld twice to produce better results.