428841 Mercury Top Cover | Genuine Used Part

🔧 Product Description

Genuine Mercury Starter Motor Top Protective Cover - Part Number: 428841

A genuine used Mercury Marine upper starter cover for selected inline three-cylinder and four-cylinder two-stroke outboard motors.

The cover mounts over the top of the starter-motor assembly and protects the starter terminal, electrical connections and adjoining wiring from accidental contact and engine-compartment debris.

⚙️ Key Features

• Genuine used Mercury Marine starter top cover
• Original part number 428841
• Superseded by later cover 428842
• Used on selected 70HP to 115HP two-stroke engines
• Factory-shaped protective cover for the starter assembly

🚤 Compatibility

Commonly used on

• Mercury and Mariner inline three-cylinder and four-cylinder cylinder-block assemblies
• Oil-injected and selected non-oil-injected two-stroke outboards

Typically suits

• Engine models:
• Mercury / Mariner 70HP three-cylinder
• Mercury / Mariner 75HP three-cylinder
• Mercury / Mariner 80HP three-cylinder
• Mercury / Mariner 90HP three-cylinder
• Mercury / Mariner 100HP four-cylinder
• Mercury / Mariner 115HP four-cylinder
• 65 Jet models using the corresponding three-cylinder powerhead
• Three-cylinder serial families from approximately 0A996142 through 0G760299
• Four-cylinder serial families using cover 428841 in the cylinder-block diagram
• HP Range: Approximately 65 Jet / 70HP - 115HP
• Engine Type: Mercury / Mariner carburetted two-stroke outboard
• Year Range: Approximately mid-1980s through the 1990s

🔌 Function

The cover insulates and protects the top starter terminal and adjoining electrical connections while helping prevent tools, wiring and loose objects from contacting the live starter circuit.

⚠️ Common Signs of Failure

• Cover is missing or cracked
• Starter terminals are exposed
• Mounting point is broken
• Cover rubs against starter wiring
• Heat damage or electrical arcing is visible
• Cover no longer clips or bolts securely into position

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 428842 → Supersedes 428841
• 428841 → Supersedes earlier base reference 42884
• 42884 earlier Mercury starter-cover reference

OEM / Related Numbers

• 428842
• 428841
• 42884-2
• 42884
• 42884-1
• 42884T
• Mercury starter top cover
• Related mounting screw as specified by cylinder-block diagram

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated