# 863007A1 50-863007a1 3860566 3885317 Mercruiser / Volvo Penta Starter Motor | Genuine Used Part πŸ”§ Product Description Genuine MerCruiser / Volvo Penta Marine Starter Motor - Part Number: 50-863007A1 A genuine marine starter motor used across MerCruiser, Volvo Penta and OMC petrol inboard / sterndrive applications. This 12-volt, 11-tooth permanent-magnet gear-reduction starter is commonly used on GM-based 4-cylinder, V6 and V8 marine petrol engines with the matching 14-inch flywheel and starter mounting pattern. βš™οΈ Key Features β€’ Genuine marine starter motor β€’ Correct MerCruiser reference 50-863007A1 β€’ Cross-references with Volvo Penta 3885317 and OMC 3860566 β€’ 12-volt, 11-tooth gear-reduction starter β€’ SAE J1171 marine ignition-protected starter family πŸ”„ Supersession & Cross Reference OEM Supersession Chain: β€’ 50-8M8021116 later related MerCruiser starter motor reference β€’ 50-863007A1 MerCruiser starter motor assembly reference β€’ 807904A1 related MerCruiser starter reference β€’ 806964A3 related MerCruiser starter reference β€’ 806964A2 related MerCruiser starter reference β€’ 812604A2 related MerCruiser starter reference β€’ 814472 related MerCruiser starter reference β€’ 12177A2 related MerCruiser starter reference OEM / Related Numbers: β€’ 50-863007A1 β€’ 863007A1 β€’ 50-8M8021116 β€’ 8M8021116 β€’ 807904A1 β€’ 806964A3 β€’ 806964A2 β€’ 812604A2 β€’ 814472 β€’ 12177A2 β€’ OMC: 3860566 β€’ Volvo Penta: 3885317 β€’ Volvo Penta: 3857747 β€’ Crusader: RA122015 Aftermarket / Verified Equivalents: β€’ Sierra: 18-6275 β€’ Sierra: 18-5913 β€’ API Marine: PH140-0017-D β€’ Recmar: REC50-863007A1 β€’ Aftermarket reference: PH1400017D 🚀 Compatibility Commonly used on: β€’ MerCruiser GM-based petrol sterndrive and inboard engines β€’ Volvo Penta GM-based petrol sterndrive and inboard engines β€’ OMC Cobra GM-based petrol sterndrive engines Typically suits: β€’ Engine models: β€’ MerCruiser 3.0L 4-cylinder petrol engines, 1999 and newer starter-family applications β€’ MerCruiser 4.3L GM V6 petrol engines using 14-inch flywheel starter layout β€’ MerCruiser 5.0L GM V8 petrol engines using 50-863007A1 β€’ MerCruiser 5.7L GM V8 petrol engines using 50-863007A1 β€’ MerCruiser 6.2L / 377 MAG GM V8 petrol engines using 50-863007A1 β€’ MerCruiser 7.4L / 454 GM V8 petrol engines using 50-863007A1 β€’ MerCruiser 8.1L / 496 GM V8 petrol engines using 50-863007A1 β€’ MerCruiser 8.2L / 502 GM V8 petrol engines using 50-863007A1 β€’ Volvo Penta GM 4-cylinder, V6 and V8 petrol engines using 3885317 / 3857747 β€’ OMC Cobra GM petrol sterndrive engines using 3860566 starter family β€’ Engine Type: GM-based marine petrol inboard / sterndrive β€’ Year Range: approximately mid-1990s onward depending on engine and starter mounting pattern β€’ Starter Type: 12V, 11-tooth, clockwise rotation, gear-reduction marine starter πŸ”Œ Function The starter motor engages the flywheel ring gear and cranks the petrol marine engine during electric starting. Its ignition-protected marine design is intended for petrol engine compartments. Common signs of failure: β€’ Starter clicks but does not crank β€’ Slow cranking despite charged battery β€’ Starter gear grinding or not engaging β€’ Heat-soak starting issue β€’ Excessive current draw β€’ Worn solenoid contacts, brushes, armature, bearings or pinion gear πŸ“¦ Condition β€’ Genuine used part β€’ Removed from running engine where applicable β€’ In good working condition unless otherwise stated ## Details - **Price:** 125.0 AUD - **Vendor:** Sawley's Auto and Marine - **Tags:** Sawley’s AAM Used Parts – Starter Motors | Marine Starter Motors & Cranking Systems ## Variants | Variant | Price | Available | |---------|-------|-----------| | Default Title | 125.00 AUD | In stock | ## Images - 863007A1 50-863007a1 3860566 3885317 Mercruiser / Volvo Penta Starter Motor | Genuine Used Part --- > Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/863007a1-50-863007a1-3860566-3885317-mercruiser-volvo-penta-starter-motor-genuine-used-part) > Updated: 2026-07-06