Just joined the forum and need some input on starter - this is a project engine that is in pretty good shape. The issue is the starter drive assembly will engage the flywheel and then immediately disengage and slide back down the shaft. The starter still spins and sounds quite strong. I removed the starter, cleaned the assembly, oiled and benched tested and received the same results. I took the unit to Auto Zone and they tested the starter and again received the same results but commented that the starter itself was strong and seemed to have had little use. Would appreciate any feed back that might save me the cost of a new starter. Also, suggestion on how to bench test a solenoid with a meter or direct power from a battery??