Multiquip 42009-36 O2 Sensor

The Multiquip 42009-36 O2 Sensor is a genuine OEM component designed for the HTXG6DF hydrostatic ride-on power trowel. Sourced directly from Multiquip, this part meets the exact specifications required by the HTXG6DF and installs as a direct replacement with no fitment issues. Keeping the oxygen sensor in proper working order is essential to maintaining correct air-fuel mixture and engine efficiency on the trowel's power unit. If your machine is running rough, throwing fuel system faults, or failing emissions checks, the 42009-36 is the correct OEM replacement to restore proper operation.

Key Features

• Genuine OEM Signal Accuracy — Manufactured to Multiquip's exact output specifications, ensuring the engine control system receives a correct, calibrated signal for precise fuel delivery.
• Direct Drop-In Replacement — Matches the original connector, thread pitch, and mounting configuration of the HTXG6DF for a straightforward swap during routine service.
• Confirmed Fitment for HTXG6DF — Verified for use on the Whiteman HTXG6DF hydrostatic ride-on power trowel series.
• Protects Engine Efficiency — A correctly functioning O2 sensor allows the engine to maintain optimal combustion; a failed sensor can cause rough running, increased fuel consumption, and potential long-term engine wear.
• Emissions and Fuel System Compliance — Replacing a worn or failed oxygen sensor with the correct OEM part helps the machine meet applicable engine emissions requirements and keeps the fuel management system operating within intended parameters.

The O2 sensor — or oxygen sensor — monitors the level of unburned oxygen in the engine's exhaust stream and sends a continuous signal to the engine control unit. The ECU uses this data to adjust the air-fuel mixture in real time, keeping combustion efficient and emissions within acceptable limits. When the sensor degrades or fails, the engine loses the feedback it needs to self-correct, which typically results in a rich or lean running condition, increased fuel use, rough idling, or an engine fault code that can take the machine out of service.

For questions about fitment or to confirm this is the right part for your machine, contact the DHS Equipment team.

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.