Testing the starter motor solenoid.
Once again, if you are uneasy with electrics, pass on this bit.
Find the solenoid, this can sometimes be a little
difficult, as it may be mounted on top of the starter motor ( as
on B.M.W. boxer engines ).
Having located the beastie, you will notice
two of the wires are much thicker than the others. These
are the wires that feed the starter motor, and should be left
well alone.
Find the wire that goes from the solenoid to
the start button, and bridge it with the wire that operates the
relay in the solenoid. If there is no "Click" as
the solenod energises, then it is shot. If the solenoid
works, and the starter motor spins, then you have a fault with
either the ignition switch, the start button or one of the
electrical interlock switches. Good luck in finding
which one. Just "bridge" them, one at a time
until the thing works. I hope you have good eyesight and an
up to date wiring diagram.