I used a cad program to design a engine mounting plate. I could print the mounting plate out full scale, cut out the bolt holes and check to see if my measurements were true. I could mount the paper drawing on the bottom of the engine and drop a plumb bob to be sure I was on the center line. The outer holes match those in the origninal Rotax 447 engine mount. Because the belt drive is more compact, I reduced the propeller clearance from seven to five inches (the minimum IVO specifies).

The two holes on the top are tapped to hold the lower radiator mounting bracket. The two little holes on the left side are pass through holes for the throttle and fuel enrichment cables. The larger hole just above and to the right is a pass through hole for the alternator leads. The next two small holes in a vertical line are tapped holes to hold the starter switch cable sheath. The lower oval hole is a battery cable pass through hole. The next two small holes on a horizontal line are tapped holes to hold the starter switch in place.