50863007A1 Mercury MerCruiser Starter Assembly | Genuine Quicksilver OEM Part

🔧 Product Description

Genuine Quicksilver Starter Motor Assembly - Part Number: 50-863007A1

Genuine Quicksilver/MerCruiser starter motor assembly for selected MerCruiser petrol stern drive and inboard engine applications. This marine starter is designed for ignition-protected use in petrol engine compartments and provides the cranking power required to start compatible GM-based MerCruiser engines.

⚙️ Key Features

• Genuine Quicksilver/Mercury OEM starter motor assembly
• Marine ignition-protected starter for petrol engine compartments
• Common offset bolt pattern replacement starter
• 12-volt starter motor with 11-tooth pinion configuration
• Designed for selected MerCruiser 3.0L, V6 and V8 petrol engines

🚤 Compatibility

Commonly used on

• MerCruiser GM-based petrol stern drive engines
• MerCruiser 3.0L 4-cylinder stern drive engines
• MerCruiser V6 and V8 petrol engine packages with matching offset-bolt starter pattern

Typically suits

• Engine models:
• MerCruiser 3.0L 4-Cylinder stern drive engines, 1999-2015 application range
• MerCruiser 4.3L V6 GM-based stern drive engines
• MerCruiser 5.0L V8 GM 305 CID stern drive engines
• MerCruiser 5.7L V8 GM 350 CID stern drive engines
• MerCruiser 6.2L V8 GM-based stern drive engines
• MerCruiser 7.4L / 454 CID V8 GM-based stern drive engines where the matching starter pattern is fitted
• MerCruiser 8.1L / 496 CID V8 GM-based stern drive engines where the matching starter pattern is fitted
• MerCruiser 8.2L / 502 CID V8 GM-based stern drive engines where the matching starter pattern is fitted
• MerCruiser GM V6 and V8 engines made approximately 1983-2016 where the matching 50-863007A1 starter configuration is specified
• HP Range: Application dependent across MerCruiser 3.0L, V6 and V8 petrol engine packages
• Engine Type: MerCruiser petrol stern drive / inboard starting system
• Year Range: Approximately 1983-2016 for compatible GM-based V6/V8 MerCruiser engines, and approximately 1999-2015 for compatible 3.0L stern drive engines

🔌 Function

The starter motor engages the flywheel to crank the engine during start-up. A marine ignition-protected starter is required in petrol engine compartments to help reduce ignition risk around fuel vapours.

⚠️ Common Signs of Failure

• Clicking sound when turning the key
• Starter not engaging the flywheel
• Slow cranking even with a charged battery
• Intermittent starting
• Grinding noise during start-up
• Starter overheating or smoking
• Corroded terminals or water-damaged starter body

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 50-863007A1
• 50-807904A1 related earlier MerCruiser starter reference

OEM / Related Numbers

• 50-863007A1
• 863007A1
• 50863007A1
• 50-807904A1
• 807904A1
• SAE J1171 ignition-protected marine starter specification

Aftermarket / Verified Equivalents

• REC: REC50-863007A1
• Sierra: 18-5913 where matched by application and starter pattern
• Arco: 30470 where matched by application and starter pattern

📦 Condition

• Genuine Quicksilver part
• Brand new
• Supplied in original or equivalent packaging