Sometimes a solenoid will actuate the fork and drive the gear into position but the contacts are so dirty insufficient current flows to spin the starter. Replacement of the solenoid is a good first step unless you like taking stuff apart and cleaning contacts. The other more serious possibility is that brushes are not making sufficient contact with the commutator. This is caused by frozen pivot pins holding the arms the brushes are on. The remedy is to disassemble the starter and free things up. Notice the two pins each carrying two brushes on arms.
Last edited by hanleyclifford; 07-13-2016 at 08:28 PM.
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