The Multiquip MQD3HA is a genuine OEM Diaphragm Pump 3" Honda GX120 Series A, engineered specifically for GX120 Series A-powered equipment in the Multiquip lineup. As a factory-original component, the part is produced to the exact tolerances and material specifications required for correct fuel delivery and carburetor function on GX120 Series An engines. DHS Equipment stocks this part as a direct replacement, so you can restore your machine to proper operating condition without guesswork. Confirm your engine series before ordering to ensure this is the correct diaphragm for your application.
Key Features
- Genuine OEM Diaphragm Material — Manufactured to the original flex-membrane specification, maintaining correct fuel draw pressure and seal integrity across the full operating range of the GX120 engine.
- Direct-Fit for GX120 Series A — Designed to seat and seal correctly in the carburetor fuel circuit of GX120 Series An engines, with no trimming or adaptation needed during installation.
- GX120 Series A Fitment — Confirmed compatibility with GX120 Series An engine configurations found across Multiquip equipment platforms.
- Consistent Fuel Delivery — A correctly functioning diaphragm maintains steady fuel metering to the carburetor; a cracked or stiffened diaphragm causes hard starting, rough running, and fuel starvation under load.
- Fuel System Integrity — As a component in the carburetor's fuel circuit, a properly seated OEM diaphragm helps prevent uncontrolled fuel flow and supports safe, stable engine operation.
The diaphragm pump is a critical component inside the carburetor's fuel delivery circuit. It flexes in response to crankcase pressure pulses, drawing fuel from the tank and metering it into the carburetor at the correct rate for the engine's demand. When the diaphragm cracks, hardens, or loses flexibility — common after extended use or prolonged storage — the engine loses the ability to draw fuel consistently, resulting in difficult starting, surging, or complete failure to run. Replacing a worn diaphragm with a correct OEM unit like the Multiquip MQD3HA restores proper fuel flow and returns the engine to dependable performance.
Part Details
| Part Number | MQD3HA |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Diaphragm Pump 3" Honda GX120 Series A |
Compatibility & Fitment
| Name | Model |
|---|---|
| GX120 | GX120 |
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.
