# 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

  

🔄 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.

  

🚤 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 damage:

  

• 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

  

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

  

📦 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

## Details

- **Price:** 100.0 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Flywheels | Engine Flywheels & Ring Gears

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 100.00 AUD | In stock |

## Images

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

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/65w-85550-11-00-yamaha-flywheel-genuine-used-part)
> Updated: 2026-07-12