The Honda 28451-ZA8-004 Starter Pulley is a genuine OEM component designed for EG650, EM650, and EX650 generators, G100 horizontal shaft engines, and WB15 water pumps. As a direct Honda OEM part, it is manufactured to the same specification as the original, ensuring the recoil starter engages and releases correctly every time. Confirm your unit's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks and more than one variant may be listed for these models.
Key Features
- Genuine Honda OEM — sourced directly from Honda, this pulley meets the exact geometry and pawl engagement profile the original recoil starter was designed around
- Correct Rope Wrap — the pulley's groove diameter and depth are matched to the starter rope specification for these models, so the rope winds, stores, and unspools smoothly under spring tension
- Broad Fitment — covers EG650, EM650, and EX650 generators, the G100 horizontal shaft engine, and the WB15 water pump, making it a useful service stock item across multiple Honda platforms
- Serial Number Verification Recommended — Honda issues revised pulleys at production serial breaks; check your machine's serial number against the compatibility table to confirm this is the correct version for your unit
The starter pulley is the central rope spool of the recoil starter assembly. When the operator pulls the starter grip, the rope unwinds from the pulley and the pulley's pawls engage the starter cup on the flywheel, spinning the engine or equipment over to initiate starting. Once released, the recoil spring retracts the rope by rewinding the pulley. A worn or cracked pulley can cause the rope to slip, fray prematurely, or fail to retract, leaving the equipment unable to start. Replacing a damaged pulley restores full, consistent starting performance.
Part Details
| Part Number | 28451-ZA8-004 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Starter Pulley |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Generator | EM650, EX650 | 1281028-9999999 |
| Generator | EG650 | 2357295-2358239 |
| Horizontal Shaft Engine | G100 | All |
| Water Pump | WB15 | 2357295-2358239 |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
