The Honda Q14-0001-200 Drive Gear (1:43 Helical) is a genuine OEM component designed for the WDP30 diaphragm water pump. As a direct Honda OEM replacement, this gear is manufactured to the exact specifications required to maintain correct diaphragm stroke and pumping rhythm in the WDP30. Sourced directly through authorized Honda channels, part number Q14-0001-200 ensures you are installing the right gear for your machine — not a close substitute. If your pump has lost output pressure or is running rough, a worn or damaged drive gear is a common cause worth checking first.
Key Features
- Correct Gear Ratio — the 1:43 helical specification is matched precisely to the WDP30's diaphragm drive mechanism, ensuring the pump delivers its rated output stroke with every revolution
- Genuine OEM Quality — manufactured by Honda to the original design tolerances, so tooth geometry and mesh engagement meet the demands of continuous pumping operation
- Direct Replacement for WDP30 Pumps — this gear is built specifically for the WDP30 diaphragm water pump; verify your serial number against the fitment table to confirm this is the correct variant for your unit
- Restored Pump Performance — a worn drive gear causes erratic diaphragm movement and reduced flow; replacing it with part number Q14-0001-200 restores consistent, full-stroke diaphragm action
The drive gear in a diaphragm water pump like the WDP30 is the core of the power transmission path between the engine crankshaft and the reciprocating diaphragm assembly. It converts rotational engine output into the back-and-forth diaphragm motion that draws water in on one stroke and expels it on the next. The 1:43 helical gear ratio controls how many diaphragm strokes occur per engine revolution, directly determining the pump's flow rate and pressure output. When this gear wears or loses tooth engagement, the diaphragm stroke becomes inconsistent, resulting in reduced flow, pulsating output, or a complete loss of pumping action.
Part Details
| Part Number | Q14-0001-200 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Drive Gear (1:43 Helical) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Diaphragm Water Pump | WDP30 | 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.
