Sierra 18-6275-1 Starter for 3.0L Mercruiser, Volvo Permanent magnet gear reduction starter. Used on late model Mercruiser and Volvo 3.0L marine engines with a 14 Flywheel. Fits 1983 newer GM V-6 V-8 engines, 1999 newer MCM 3.0L. Interchangeable with Arco 30470 Mallory 9-15907 Mercruiser Stern Drive 50-12121A2 50-12177A2 50-77328A1 50-77328A3 50-806964A2 50-806964A3 50-806964A4 50-806964R3 50-806964R4 50-807904A1 50-812428A3 50-812604A2 50-822330A2 50-863007A1 50-863007R01 50-864340A2 50-8643