# 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

  

🔄 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

  

🚤 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

  

📦 Condition

  

• Genuine Quicksilver part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 487.15 AUD
- **Vendor:** Quicksilver
- **Tags:** Quicksilver Marine Parts | Oils Service Kits & Engine Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 487.15 AUD | In stock |

## Images

- 50863007A1 Mercury MerCruiser Starter Assembly | Genuine Quicksilver OEM Part

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> Source: [Sawley's Auto and Marine](www.sawleysautoandmarine.com.au/products/50863007a1-mercury-mercruiser-starter-assembly-genuine-quicksilver-oem-part)
> Updated: 2026-05-17