Put the crankshaft damper retaining bolt back into the crackshaft and
then use a 1/2" drive ratchet/breaker to turn the crank.

    As far as finding TDC, get a 'piston stop' from your local tool crib.
If you dont want to buy a piston stop, you can do the following. Remove
spark plug from #1 cylinder. Place your finger/thumb over the spark plug
hole in such a way that you form a fairly good seal. Turn the crank
until you feel the air pressure building around your thumb. You have now
identified the piston coming to the top of its travel on the compression
stroke. From here, you want to as closely identify when the piston is at
the complete top of its travel. I have used a nice long (8" plus)
plastic straw inserted into the spark plug hole with a mark or two on it
to judge distance. By turning the crank back and forth, you'll be able
to make a really good guess at to where TDC is.

    Remember that this is a *4 stroke* engine, so the piston travels to the
top of its bore *twice* in a complete cycle; once to push exhaust gases
out and once to compress fresh gas/air mixture on the compression
stroke. The point at which the piston is at the top of its travel on the
compression stroke is TDC.

    An example piston stop is here;

    http://www.shopcranecams.com/cranecams/pisstoptopde.html

    I like reasons to buy tools, so I bought a piston stop last time I was
checking TDC.