Multiquip 138 Engine, Honda GX340 (11HP)

The Multiquip 138 Engine, Honda GX340 (11HP) is a genuine OEM Honda GX340 powerplant sourced directly through Multiquip and designed for a wide range of Multiquip and Whiteman equipment. This 11HP engine serves as the certified OEM replacement unit across walk-behind trowels, ride-on power floats, concrete mixers, rollers, pumps, welders, and generators — covering model families including HDA, MC12PH, MRH601DS, PRX, LD6, HTX6H, HTXG6DF, QP205SH, QP303H, DLW300ES, and DAC7000SS series equipment. Sourcing a genuine OEM unit ensures you receive the correct displacement, output rating, mounting configuration, and throttle linkage geometry for a direct installation without guesswork. Keep a Multiquip 138 on hand as a depot-level spare and eliminate extended downtime when engine failure occurs on your most-used machines.

Key Features

• Certified Honda GX340 Output — Delivers the full 11HP power rating that Multiquip-matched equipment is engineered around, maintaining blade speed, pump flow, and drive performance at spec.
• Genuine OEM Unit — Sourced through Multiquip's authorized supply chain; correct carburetor configuration, PTO shaft dimensions, and mounting bolt pattern are matched to the application from the factory.
• Broad Cross-Equipment Compatibility — A single part number covers walk-behind and ride-on trowels (HDA, PRX, LD6, HTX6H, HTXG6DF), concrete mixers (MC12PH), rollers (MRH601DS), pumps (QP205SH, QP303H), welders (DLW300ES), and generators (DAC7000SS series).
• Direct Engine Replacement — Mounts to existing frames and equipment decks using original hardware positions, preserving throttle cable routing, air filter orientation, and fuel line connections.
• Honda GX-Series Proven Durability — The GX340 is a commercial-grade overhead-valve design known for consistent cold starts, stable idle under load, and long service intervals in high-cycle construction environments.
• Fuel System Integrity — OEM carburetion and governor settings are pre-calibrated for the target RPM range required by each equipment family, protecting against over-speed or lean-run conditions.

The Honda GX340 is a 337cc single-cylinder, overhead-valve, four-stroke gasoline engine rated at 11 horsepower. In equipment like walk-behind and ride-on power trowels, it drives the gearbox or hydraulic pump that controls blade pitch and rotation speed — loss of power directly affects surface finish quality and operator control. In concrete mixers, pumps, and rollers, the engine provides the torque required to sustain output under variable load. When an engine fails or degrades — through wear, oil contamination, or impact damage — replacing it with the correct OEM unit restores the machine to its original performance envelope rather than adapting around a mismatched powerplant.

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.