I have a 1973 evinrude ouboard 65hp engine that ran fine on the lake Saturday but had problems when we docked. When we attempted to turn the engine, sometimes we would get nothing, almost like no battery juice was flowing...both batteries work well; other times the "bendix" would turn real slow and not engage the flywheel....just spins; my husband took a metal bar and lifted the bendix but it never spun strong enough to turn the flywheel. Took it to Auto Zone and was told the starter is fine... Is it time to replace the bendix? Would a bad bendix appear to be running on "low" juice like that? Thanks.