878226T10 Mercury Flywheel | Genuine Used Part

🔧 Product Description

Genuine Mercury / Mariner 92-Tooth Magnetic Flywheel - Part Number: 878226T10

A genuine used magnetic flywheel for selected Mercury and Mariner 65 Jet, 75HP and 90HP three-cylinder two-stroke outboards with electric start and oil injection.

The flywheel features a 92-tooth starter ring and carries permanent magnets that generate ignition and charging current through the stator. Mercury 878226T10 replaces earlier flywheels 859234T12 and 9008A58.

⚙️ Key Features

• Genuine Mercury / Mariner magnetic flywheel
• Correct Mercury reference 878226T10
• 92-tooth starter ring gear
• Designed for electric-start, oil-injected engines
• Suits selected 65 Jet, 75HP and 90HP three-cylinder outboards

🚤 Compatibility

Commonly used on

• Mercury and Mariner 65 Jet outboards
• Mercury and Mariner 75HP three-cylinder outboards
• Mercury and Mariner 90HP three-cylinder outboards
• Electric-start engines with factory oil injection

Typically suits

• Engine models:
• Mercury 65 Jet three-cylinder two-stroke
• Mariner 65 Jet three-cylinder two-stroke
• Mercury 75HP three-cylinder two-stroke
• Mariner 75HP three-cylinder two-stroke
• Mercury 90HP three-cylinder two-stroke
• Mariner 90HP three-cylinder two-stroke
• USA and Belgium production engines whose flywheel diagram specifies 878226T10
• Electric-start and oil-injected configurations only
• HP Range: 65 Jet / 75HP - 90HP
• Engine Type: Three-cylinder carburetted, oil-injected two-stroke outboard
• Year Range: Approximately 1994 - 2006

🔌 Function

The flywheel provides starter engagement, rotating inertia and magnetic energy for the stator and ignition-trigger assemblies.

⚠️ Common Signs of Failure

• Starter teeth are worn or missing
• Magnets are cracked, loose or detached
• Battery charging output is low
• Ignition spark becomes intermittent
• Flywheel contacts the stator
• Crankshaft key or taper is damaged
• Excessive vibration or runout
• Rust or corrosion forms around the magnetic ring

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 261-878226T10 → Supersedes 261-859234T12
• 261-859234T12 → Supersedes 261-9008A58
• 261-9008A58 earlier Mercury flywheel assembly

OEM / Related Numbers

• 878226T10
• 261-878226T10
• 859234T12
• 261-859234T12
• 9008A58
• 261-9008A58
• Casting: 261-9007-C3
• Stator assembly according to engine serial range
• Trigger assembly according to engine serial range

Aftermarket / Verified Equivalents

• No aftermarket equivalent

📦 Condition

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