...and in the absense of an A- frame you need about 4" of 2x1, an 8mm drill and some bungee.
Drill the wood , loop the bungee a copmlete lap of the leg just below the powerhead, then tie two figure 8 knots having tensioned the bungee and passed it throughthe two holes in the wood. For "run" you swivel the wood out the way (the fin halfway down the leg stops it getting to the prop). For "up" swivel it round & lift into the gap 'tween clamp & swivel. the corner on the swivel bracket holds it in place nicely. A further length of bungee tied to the clamp & looped round the leg holds the engine down onto the wood. (ensure that loop is short enough to not meet the prop when running, although not too difficult as the bungee stretches).