The G55H Gasoline-Powered Flex-Shaft Drive Motor by Multiquip sets the industry benchmark for portable concrete vibration, combining robust Honda-engine performance, jobsite durability, and unmatched flexibility. Designed for contractors managing remote pours or projects where power access is limited, the G55H brings powerful, dependable vibration to any slab, footing, wall, or column—eliminating dependency on electric generators while maximizing jobsite mobility and operational speed.

Product Overview: G55H Gasoline-Powered Flex-Shaft Drive Motor

The G55H utilizes a proven and efficient Honda GX160 4-stroke engine (4.8 HP), delivering reliable starts, low maintenance, and continuous operation even under tough field conditions. Its swivel-mounted base allows for a full 360° rotation, streamlining machine movement and reducing flex shaft kinking during long jobs. Compatible with Multiquip’s full FS-series flexible shafts and steel heads, this rugged drive motor is suited to a wide range of construction, roadwork, and specialty pours.

Key Features and Benefits

• Honda GX160 Engine (4.8 HP): Offers smooth power, exceptional reliability, easy recoil start, and low fuel usage—making the G55H a leader in portable vibration technology.

• 360° Swivel Mount: Enables effortless movement and repositioning, which is especially critical for scaffolding, walls, and jobsites with frequent reorientation.

• Quick-Disconnect Knob: Allows rapid, tool-free removal or attachment of flexible shafts, ensuring downtime is minimized during setup or shaft changes.

• Steel/Rubber Head Compatibility: Accepts Multiquip’s full range of steel vibration heads from 1-3/8" up to 2-5/8", optimizing versatility for low to high-slump concrete across various form depths.

• Optimal for Remote & Generator-Free Sites: No external power source or electrical cords required—ideal for infrastructure, bridgework, remote slabs, and highway pours.

• Heavy-Duty Construction: Built to handle jobsite abuse with a robust steel frame, powder-coated housing, and quality internal components.

• Low Oil Shutdown: Honda’s engine protection sensor automatically shuts the motor down if oil drops below safe limits, preventing costly repairs and extending engine life.

Technical Specifications

Performance and Jobsite Utility

Thanks to its high torque and optimal RPM, the G55H vibrates concrete rapidly, producing strong consolidation through deep forms, thick slabs, and heavily reinforced structures. Operating at full power, it covers large projects with fewer passes—reducing labor, minimizing air voids, and enhancing finished concrete quality.

The quick-disconnect system lets crews swap flexible shafts or vibration heads in seconds, reducing downtime and maximizing operational flow. The G55H is recommended for use with most FS-series flex shafts and vibration heads, supporting custom fit for every site need.

Durability, Maintenance, and Safety

• Engine Reliability: Honda GX160 motors are globally trusted for fuel efficiency, easy maintenance, and years of low-cost use.

• Low Oil Shutdown: Protects investment against engine damage, ideal for multi-crew or rental fleet settings.

• Swivel Mount Base: Protects the shaft and drive assembly from accidental strain and extends component lifespan.

• Accessible Maintenance Points: Oil, air filter, spark plug, and fuel system reach easily—streamlining daily upkeep.

Applications

• Remote slab pours and highway construction

• Bridges, retaining walls, deep footings

• Large commercial floor and paving projects

• Infrastructure repair where power is not available

• Specialty jobs: scaffolding pours, columns, verticals

Accessories and Additional Features

• Flexible shafts (FS series, 3–21 ft)

• Multiquip steel or rubber vibration heads (1-3/8" to 2-5/8" diameter)

• Shaft coupler adapters for long reach or specialty forms

• Weather-resistant engine covers for storage

• Field service kits (filters, plugs, oil) for high-use crews

Competitive Comparison

Why Professionals Choose the G55H

For unmatched mobility, consolidation strength, and site flexibility, contractors rely on the G55H Gasoline-Powered Flex-Shaft Drive Motor. Its robust Honda engine, smart swivel base design, and compatibility with Multiquip’s best shaft and head options provide a solution to every remote, large, or generator-free pour. With user-centered features, quick maintenance, and rugged construction, the G55H guarantees top results for professional crews and rental companies alike.