Home » Tony’s Tips » Articles » Identifying the Starter Motor on a Cummins Marine EngineIdentifying the Starter Motor on a Cummins Marine Engine 6BT 2-Bolt Starter Motor 330 / 370 6BTA 5.9 2-Bolt Starter Motor 330 / 370 6BTA 5.9 3-Bolt Starter Motor B-Series 3-Bolt Starter Motor