65W-85550-11-00 Yamaha Flywheel | Genuine Used Part

🔧 Product Description

Genuine Used Yamaha F25 / F40 Four-Stroke Flywheel Rotor - Part Number: 65W-85550-11-00

A genuine pre-owned Yamaha rotor and flywheel assembly for selected F25 and F40 four-stroke outboards.

Yamaha describes this component as the rotor assembly. It mounts to the crankshaft and carries the permanent magnets used by the stator to generate electrical power.

⚙️ Key Features

• Genuine Yamaha Marine used rotor assembly
• Correct OEM part number 65W-85550-11-00
• Four-stroke flywheel and magnet rotor
• Suitable for selected F25 and F40 engines
• Works with the matching Yamaha stator and ignition system
• Original crankshaft-taper and magnet configuration

🚤 Compatibility

Verified example applications include

• 2001 Yamaha F40TLRZ
• 2004 International F25ELHC
• Selected F25A four-stroke engines
• Selected F40 four-stroke engines using the 65W generator assembly

Important fitment note

• Yamaha F25 and F40 production includes more than one electrical system.
• Confirm the exact engine prefix, model suffix and flywheel number.
• Ring gear, starter components and mounting hardware are included only when shown.

🔌 Function

The flywheel's magnets pass the stator windings to create charging and ignition-system electrical output.

⚠️ Common Signs of Failure

• Magnets are loose or cracked
• Flywheel taper is damaged
• Keyway is worn
• Charging output is low
• Stator rub marks are present
• Flywheel runs out of true
• Starter-ring teeth are worn where fitted
• Corrosion develops beneath the rotor

🛠️ Service Notes

Recommended checks before installation

• Compare the flywheel number
• Inspect every magnet
• Check taper and keyway condition
• Inspect the stator for contact damage
• Confirm ring-gear compatibility where applicable
• Clean the crankshaft and flywheel tapers
• Install the correct key
• Torque the retaining nut to specification
• Test charging output after installation

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 65W-85550-11-00
• 65W855501100
• OEM Description: Rotor Assembly
• Related Yamaha generator and stator components vary by model
• Parsun-format reference: F25-05180000W

Aftermarket / Verified Equivalents

• OVERSEE: 65W-85550-11 aftermarket rotor assembly
• Parsun: F25-05180000W - aftermarket-listed cross-reference
• Unbranded replacement flywheels sold under 65W-85550-11-00

Aftermarket fitment note

• Verify magnet count, crankshaft taper, charging output and timing references before using a non-Yamaha assembly.

📦 Condition

• Genuine Yamaha Marine used part
• Pre-owned rotating electrical component
• Cosmetic marks and oxidation may be present
• Magnets, taper and keyway require inspection
• Supplied in protective or equivalent packaging