The Multiquip Q16PRU11 Spark Plug is a genuine OEM spark plug designed for HHNG5 Whiteman ride-on power trowels and QP402B centrifugal pumps. As a direct OEM replacement, it meets the exact ignition specifications required by Multiquip for these machines, ensuring the engine starts cleanly and fires consistently under load. Sourced directly from Multiquip, the Q16PRU11 is the correct plug to specify when servicing either of these units.
Key Features
- Correct Ignition Spec: — Matched to the electrode gap, heat range, and thread specification required by the HHNG5 and QP402B engines — not a universal substitute.
- Genuine OEM Part: — Supplied by Multiquip as the factory-specified plug, so you know you are installing exactly what the machine was built to run on.
- Drop-In Installation: — Threads directly into the cylinder head using the original port, with no adapters or modifications needed to the engine.
- Confirmed Fitment: — Compatible with the HHNG5 Whiteman ride-on power trowel series and the QP402B centrifugal pump — verify your model before ordering.
- Clean Combustion: — A fresh plug restores full spark energy, supporting complete fuel burn, smooth idle, and strong throttle response across the RPM range.
- Ignition Safety: — A worn or fouled spark plug can cause hard starts, misfires, or uncontrolled fuel buildup in the cylinder — replacing it on schedule is a basic but critical maintenance step.
A spark plug ignites the air-fuel mixture inside the engine cylinder, producing the combustion stroke that powers the machine. When a spark plug wears, fouls with carbon deposits, or the electrode gap widens beyond specification, ignition becomes inconsistent — leading to hard starting, rough running, increased fuel consumption, and potential engine damage over time. Replacing the spark plug with the correct OEM part, such as the Multiquip Q16PRU11, restores full ignition efficiency and keeps the engine running at its intended output.
Need help confirming fitment or locating additional service parts? Contact the DHS Equipment team for assistance.
Part Details
| Part Number | Q16PRU11 |
|---|---|
| Brand | Multiquip |
| Part Type | Genuine OEM |
| Description | Spark Plug |
Compatibility & Fitment
| Name | Model |
|---|---|
| Whiteman Ride-On Power Trowels | HHNG5 |
| Centrifugal Pumps | QP402B |
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.
Multiquip
Multiquip Part # 491055S - Plug Spark Use Q16PRU11 - Genuine OEM Part
