Multiquip 9807956855 Spark Plug W20EPR-U Denso

The Multiquip 9807956855 is a genuine OEM Spark Plug W20EPR-U Denso designed for a wide range of Multiquip and Whiteman equipment across multiple product families. This Denso W20EPR-U plug is the factory-specified ignition component for equipment including MQ concrete mixers, Whiteman mortar mixers, plate compactors, trash pumps, centrifugal pumps, rollers, generators, and masonry saws. With such broad cross-model coverage — spanning MC94P/S, WM70S/P, MVH208GH, QP3TH, R2000H, SP1G, GAC2.5HR, and many more — verifying your model code against part number 9807956855 ensures you receive the exact plug your engine requires. Sourced directly from Multiquip's OEM supply chain, this spark plug installs as a direct replacement with no guesswork.

Key Features

• Factory-Specified Denso Ignition Grade — The W20EPR-U is the OEM-designated plug for Honda gasoline engines across multiple Multiquip equipment families, delivering the correct heat range and electrode geometry the engine was tuned around.
• Drop-In Thread and Reach Match — Threads in with the same reach, seat type, and hex size as the original, so no adapter or modification is needed during installation.
• Broad Cross-Model Coverage — A single part number covers MC and WM series mixers, MVH plate compactors, QP pumps, R2000H rollers, SP and MP saws, and GA/GAC generators, making it a practical stock item for mixed fleets.
• Consistent Cold-Start and Throttle Response — A worn or fouled spark plug causes hard starting, rough idling, and loss of power under load; a fresh OEM plug restores clean ignition timing and full engine output.
• Fuel System Safety at Ignition — Correct electrode gap and heat range prevent pre-ignition and misfires that can stress engine internals or cause fuel to pass unburned into the exhaust, keeping combustion controlled and safe.

A spark plug is the final link in the ignition cycle — it converts the high-voltage pulse from the ignition coil into a precisely timed spark that ignites the air-fuel mixture inside the combustion chamber. The heat range of the plug determines how quickly it sheds combustion heat; use a plug that runs too hot or too cold and you risk fouling, pre-ignition, or accelerated electrode wear. When a spark plug degrades, symptoms include difficulty starting, inconsistent idle, reduced power output, and increased fuel consumption — all of which directly affect productivity on a pour, mix, or compaction run. Replacing it on schedule with the correct OEM part keeps the engine firing cleanly and protects the surrounding ignition components from unnecessary strain.

Part Details

Compatibility & Fitment

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.