If you take the 3 screws out and remove the
rope pulley you will see the rest of the 2 flat
sided nut. This arrangement may remove the
flywheel by backing off this nut. As you
back off this flat sided nut, it pushes up on the
rope pulley separating the flywheel from the
crankshaft. However if the flywheel is really
on there you can easily destroy the rope pulley
so most don’t recommend it. Loose your brass
rod and get a wooden dowel to use for tapping
on the pistons. Keep adding solvents and
attempting to get it to move daily. It may take
some time. Applying heat to the cylinders may
speed up the process. I have made this fitting
from an old spark plug to use air to push
solvents in and around the pistons. Only
works on the ones above the ports unless
you can block them.
Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.