Honda GX240 7.9HP 242cc Engine – 1in Shaft, Forced Air Cooled
Honda GX240 generates 7.9 horsepower. A 242cc block backs up the output, and torque peaks at 18.3 Nm. Recoil Start gets it running without a fuss. A 3-year warranty backs the build.
- Puts out 7.9 horsepower reliably
- Displacement comes in at 242cc
- Torque tops out at 18.3 Nm
- Shaft measures 1in, horizontal configuration
- Recoil pull gets it running fast
Description
During continuous 8-hour cutting shifts, the Honda GX240 1in shaft horizontal engine maintains rock-steady output under varying mechanical resistance. Concrete flat saws and industrial chippers put severe torsional stress on drive shafts, causing undersized shafts to twist or shear keys. This 242cc 7.9HP engine solves that failure point with a heavy 1-inch straight output shaft engineered to handle high torque output without structural deflection.
An overhead valve cylinder head layout pulls cool ambient air over the intake valve, keeping operating temperatures low during hot afternoon runs. Splash lubrication throws motor oil across the cylinder bore and wrist pin, stopping metal transfer under heavy continuous operation. The heavy-duty manual recoil starter uses an automatic mechanical decompressor that vents cylinder pressure during cranking, making pull-starts smooth and quick on cold mornings.
Technical Features of Honda GX240 1in Shaft
- 242cc Commercial OHV Powerplant: Produces 7.9 net horsepower to drive heavy masonry flat saws and wood chippers.
- 1-Inch Straight Keyed Shaft: Handles high radial belt loads and direct pump drives without shaft twist or key shear.
- Heavy-Duty Manual Recoil Starter: Features steel ratchet pawls and high-strength pull cord for reliable manual starting.
- Dual-Element Commercial Air Filter: Seals tight against the carburetor body to stop dirt intrusion in dusty conditions.
- Integrated Honda Oil Alert: Shuts down the ignition automatically if crankcase oil falls below safe operating levels.
Heavy-Duty Architecture & Low Maintenance
Designed for demanding commercial service, this 1-inch shaft horizontal engine provides steady power output with minimal field maintenance requirements.
- A rigid aluminum crankcase casting and precision-machined 1-inch shaft journal resist side-load belt stress.
- Overhead valve efficiency delivers clean fuel combustion to reduce carbon accumulation on valve faces.
- Concrete cutting contractors and landscape maintenance companies secure dependable machine uptime across long operating seasons.
Equipment Integration & Fitment Specs
Weighing 55 pounds dry with a universal 4-bolt horizontal mounting base and 1-inch shaft, this motor repowers concrete flat saws, commercial chipper-shredders, large water pumps, and hydraulic log splitters.
Commercial Coverage & Maintenance Upkeep
- Factory warranty terms provide 3-Year commercial and consumer coverage on all core mechanical assemblies.
Service this engine with fresh 10W-30 motor oil every 100 operating hours. Tap clean the air filter element weekly on dusty job sites, and maintain the spark plug electrode gap at 0.028 to 0.031 inches. Order the Honda GX240 1in shaft horizontal engine from Mulmotor.com for guaranteed factory-fresh units, complete manufacturer warranty coverage, and dedicated commercial equipment support.
Honda GX240-QA2 Technical Specs
| Brand | Honda |
| Full Model Code | GX240-QA2 |
| Country of Origin | Japan |
| Engine Orientation | Horizontal Shaft |
| Engine Type | 4-Stroke, OHV, Single Cylinder |
| Displacement | 242 cc |
| Bore x Stroke | 73 x 58 mm |
| Compression Ratio | 8.2:1 |
| Maximum Output | 5.9 kW (7.9 HP) @ 3600 RPM |
| Maximum Torque | 18.3 Nm (13.5 lbs-ft) @ 2500 RPM |
| Specific Fuel Consumption | 2.1 L/hr @ 3600 RPM |
| Fuel Induction System | Butterfly Carburetor |
| Ignition System | Digital CDI |
| Start System | Recoil Start |
| Shaft Specification | 1" (25.4 mm) Straight Keyway Shaft |
| Fuel Tank Capacity | 5.3 Liters |
| Oil Capacity & Type | 1.1 Liters / SAE 10W-30 |
| Cooling System | Forced Air Cooled |
| Dry Weight | 25.2 kg |
| Dimensions | 380 x 428 x 422 mm |
| Standard Warranty | 3 Years |
| Primary Application | Pressure Washers, Generators, Industrial Equipment |












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