The Honda Q14-0001-199 Driven Gear (1:43 Helical) is a genuine OEM component designed for the WDP30 diaphragm water pump. Sourced directly from Honda, this gear carries the exact tooth profile, pitch, and 1:43 ratio specification required by the WDP30 drivetrain. Buyers working on WDP30 pumps can confirm fitment by checking their unit's serial number against the compatibility table below before ordering.
Key Features
- Genuine OEM Gear Geometry — helical tooth form and 1:43 ratio are matched to Honda's original design, ensuring smooth, quiet power transfer through the WDP30 drive assembly
- Direct Replacement — an exact-specification swap engineered to fit the WDP30 diaphragm water pump with no alteration to the drive assembly
- Serial Number Verification Recommended — Honda updates driven gears at production breaks, so cross-check your pump's serial number against the fitment table to confirm this is the correct ratio variant for your unit
- Drive Ratio Accuracy — the 1:43 helical specification governs diaphragm stroke speed and pump output; installing an incorrect gear degrades flow performance and can shorten pump service life
In a diaphragm water pump like the WDP30, the driven gear is part of the gear reduction assembly that translates engine rotation into the slower, controlled crankshaft motion needed to reciprocate the diaphragm. The 1:43 ratio governs how many times the diaphragm cycles per engine revolution, directly setting the pump's flow rate and pressure output. When this gear wears or loses teeth, the drive ratio is disrupted, causing erratic diaphragm action, reduced output, and accelerated wear on surrounding drive components.
Part Details
| Part Number | Q14-0001-199 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Driven 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.
