The Honda 23421-733-000 Countershaft Second Gear (45T) is a genuine OEM replacement built for F401, F501, FG400, and FG500 tillers. As a direct Honda OEM component, this gear is manufactured to the exact tooth count, pitch, and dimensional tolerances of the original — ensuring proper mesh and smooth transmission of drive force through the tiller's gearbox. This part is the correct replacement for all four models listed; confirm your unit's serial number against the fitment table before ordering, as Honda updates parts at production serial breaks.
Key Features
- Genuine OEM Gear Geometry — Honda-sourced with the exact 45-tooth profile required for correct gear mesh and quiet, efficient power transfer through the countershaft assembly.
- Direct OEM Replacement — manufactured to match the original part exactly, so this gear drops into the gearbox without rework or modification to surrounding components.
- Broad Tiller Fitment — designed for F401, F501, FG400, and FG500 Honda tillers; check your serial number against the fitment table to confirm the correct application for your unit.
- Transmission Integrity — a worn or chipped second gear causes gear slip, grinding, and loss of drive in second range; replacing it restores full power delivery to the tines.
The Countershaft Second Gear (45T) is one of the stepped gears in a tiller's transmission that determines the speed and torque ratio delivered to the tine shaft in second gear range. It meshes with a corresponding gear on the main shaft to multiply torque from the engine into usable tine-turning force. When this gear wears, chips, or loses teeth, the transmission slips or locks up in second range, leaving the tiller unable to maintain consistent tine rotation — restoring it brings the drivetrain back to full working order.
Part Details
| Part Number | 23421-733-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Countershaft Second Gear (45T) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Tiller | F401, F501, FG400, FG500 | All |
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.
