I, too, have a bulkhead that makes the hand start crank worthless; I can't swing the handle. I cut the socket part off the hand-crank handle and had it welded to a mechanic's universal joint. That sockets onto an extension that I can chuck into a very powerful Milwaukee 28 volt right angle drill (a drill that makes a wonderful electric winch handle, BTW.) I put the now-electrified start handle socket into the reciever on the engine, release the compression, mash the button on the drill and, ...and, ... and...(wait for it...)

No joy.

My engine runs fine but it has always been a bit of a hard starter. It won't even try to start on one cylinder and it just bogs down from compression.

I bet it would work with an easy-starting engine, though (and I'd definitely use a drill, not an impact wrench. You want to spin it, not pound in it.)