What I was trying to point out is that you have some engine placement on the motor mount. Given this info, the Saito 180's measurement from the rear mounting hole to the prop hub is 3.7". The distance from the front mounting hole to prop hub is 2.76".

After bolting on the engine mount (don't have to worry about width at this point) and dry mounting the cowl with tape, measure the distance from the front end of the slot in the engine mount and the opening of the cowl. This measurement must be less than 2.635 inches. Then measure the distance between the aft end of the slot in the engine mount and the opening of the cowl. This measurement must be greater than 3.85 inches. If both of these measurements agree with mine then permanently mount the cowl and attach and line up your decals. If they don't adjust the dry mount of the cowl until they do. When you mount your engine all you will have to do is slide it to the right position to enable a 1/8" clearance between your prop hub and the cowl.

This is the best way for me to describe it to you because I don't not know the measurement of the engine mount but do know the measurement of the engine, which you can find here:

http://www.horizonhobby.com/ProdInfo...ingles2004.pdf