Description
Overview:
The Rotor (Old Type) for Honda G100K1 engines is a genuine Honda OEM starter component designed to restore smooth, reliable pull-start operation. Moulded from hard-wearing polymer, it forms the core of the recoil starter, guiding the rope and transferring your pull to the engine to crank it into life. This rotor replaces cracked, worn, or warped parts that can cause slipping, jamming, or difficult starting. Built to Honda's specifications for the G100K1 Old Type starter assembly, it provides a precise fit and consistent performance on small petrol engines commonly found in compact generators, water pumps, light construction equipment, and garden machinery. It is an ideal maintenance replacement when refurbishing older G100K1 units to keep equipment dependable and easy to start.
Key Features:
- Genuine Honda OEM part for assured compatibility and performance (reference: 28420-ZG0-003, Old Type)
- Purpose-built for the Honda G100K1 Old Type recoil starter for an accurate, secure fit
- Durable, impact-resistant polymer construction to withstand repeated pulls and engine vibration
- Smooth rope groove and stable hub to promote consistent rewind and engagement with starter pawls
- Helps prevent starter slip, snatch, and premature cord wear, improving starting reliability
- Straightforward replacement with basic hand tools; no modifications required on the correct Old Type unit
- Engineered to Honda tolerances for balance, longevity, and stable rotation
- Suitable for regular service schedules in trade, hire, and DIY environments
Typical Applications:
Used when overhauling the recoil starter on Honda G100K1 Old Type engines in compact generators, water pumps, plate compactors, small tillers, and similar plant or garden machines. Ideal where the original rotor has cracked, glazed, or deformed, causing rope snagging, poor engagement, or difficult starting.
Also known as:
Starter pulley, recoil starter rotor, pull-start rotor, starter spool, rope rotor, rewind pulley, starter reel.
Fits Models:
G100K1
Alternate Part Numbers:
28420ZG0003
Product Specifications
| L&S Part No. | 28420 ZG0 003 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Honda |
| OEM No. | 28421-Z1B-D10 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Honda |
| Key Features | - Genuine Honda OEM part for G100K1 Old Type engines - Impact-resistant polymer construction for durability - Designed for precise fit in recoil starter assembly - Prevents starter slip and premature cord wear - Suitable for compact generators and garden machinery |
| Fits Models | G100K1 |

