if there is no key then the gear either has to be cast into the crankshaft itself or welded on. If it is just pressed on with no key then in time it would spin on the crankshaft. if that is the case, then I would not waste my time rebuilding an engine like that. Just saying. There are lots of engines out there that can just be swapped in.I don't need your know-it-all attitude. I would gladly do what Taryl said pal but there is no key that holds the gear on the crank shaft. There is no timing mark on the gear either.
I had to find a real knowledgeable person to show us the way (Taryl). Not a know it all for sure. My bad for not being in your garage and understanding what you meant. Bet you typed it out in English too LOL. My fault.I don't need your know-it-all attitude.