The Honda Q14-0000-137 Straight Teeth Transmission (1:43) is a genuine OEM component designed for WDP20 and WDP30 diaphragm water pumps. As a direct Honda OEM part, it is manufactured to the same specification as the original, ensuring a correct fit without adaptation. This transmission carries a 1:43 gear ratio designation, making it essential to match part number Q14-0000-137 exactly to your pump model before ordering. Check your pump's serial number against the fitment table to confirm compatibility before purchase.
Key Features
- Genuine OEM Gear Integrity — straight-cut tooth profile matches the original transmission geometry, maintaining the correct drive engagement within the pump's drivetrain
- Ratio-Specific Replacement — the 1:43 gear ratio is a defined specification; substituting an incorrect ratio alters pump stroke rate and flow output, making an exact match critical
- Confirmed Pump Fitment — built for WDP20 and WDP30 diaphragm water pumps; verify your serial number against the fitment table to ensure this is the correct variant for your unit
- Restored Pump Output — a worn or damaged transmission disrupts the crank-and-rod drive that actuates the diaphragm, causing reduced flow or complete loss of pumping action; this part restores proper operation
In a diaphragm water pump such as the WDP20 and WDP30, the transmission converts engine output into the controlled reciprocating motion that drives the pump's diaphragm back and forth. When the transmission wears or fails, the diaphragm loses its stroke and the pump can no longer build pressure or sustain flow, making timely replacement with the correct part essential to keeping the pump in service.
Part Details
| Part Number | Q14-0000-137 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Straight Teeth Transmission (1:43) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Diaphragm Water Pump | WDP20, 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.
