The ARCO 30470-A Inboard Starter is a replacement starter for Mercruiser, Volvo Penta, OMC, Marine Power, and other marine applications. It will replace 9 tooth drive OEM versions 3.0 - 8.1L with 14 in. flywheel. Anodized casting, nickel-plated brush holder. OEM mounting bolts included. It replaces the following part numbers: BRP/ OMC 984456, BRP/OMC 986505, BRP/OMC 3850525, BRP/OMC 3853982, BRP/OMC 3854751, BRP/OMC 3855177, BRP/OMC 3857747, BRP/OMC 3860566, Delco 9000735, Delco 9000762, Delco 9000768, Delco 9000789, Delco 9000819, Delco 9000821, Delco 9000839, Delco 9000840, Delco 9000849, Delco 9000885, Delco 9000940, Delco 9000884 (Hi Perf), Marine Power 0174-000, Mercury 50-12121A2, Mercury 50-12177A2, Mercury 50-806964A2, Mercury 50-806964A3, Mercury 50-806964A4, Mercury 50-812428A3, Mercury 50-812604A2, Mercury 50-822330A2, Mercury 50-864340A2, Mercury 50-8M8021116, Mercury 50-99418A2, Sierra 18-5905, Sierra 18-5910, Sierra 18-5913, Sierra 18-6946, Volvo 3587625, Volvo 3857747, Volvo 3860566, Volvo 3860764, Volvo 3885317, Volvo 3850525-1, Volvo 3853982-1, Volvo 3854751-9, Volvo 3855177-6, and Volvo 3856004-1. All armatures tested to withstand 50 times operation voltage (12V). All motors performance tested at 5 different load levels. All motors must meet or exceed OEM performance before being boxed.