Honda GX390-QNR2 – 11.7HP 389cc Horizontal Engine

Honda GX390-QNR2 11.7HP Horizontal Engine

Solving vibration and noise challenges in heavy-duty industrial machinery, the Honda GX390-QNR2 delivers a precision-engineered solution through its balanced crankshaft and digital CDI ignition. This 389cc single-cylinder architecture allows the Honda-manufactured assembly to generate 26.4 Nm of peak torque for steady load management. The specific QNR2-spec design utilizes an advanced muffler system to optimize volumetric efficiency and dampen harmonic vibrations during sustained 11.7HP operations. This mechanical configuration ensures durable power delivery for professional-grade construction equipment and high-capacity pumps across North America.

Advanced EPA Phase 3 and CARB standards define the Honda GX390-QNR2 as a benchmark for reliable and thermally stable large-block propulsion. The specialized metallurgy in this QNR2 specification incorporates cast iron cylinder sleeves and forged steel connecting rods to mitigate internal friction. This horizontal power unit utilizes a dual-element air cleaner to maintain combustion purity when the mechanical governor reacts to load demands. Professional equipment owners benefit from the secure 1-inch straight keyed shaft interface.

Technical Specifications of Honda 11.7HP GX390-QNR2

• Powerful 4-Stroke OHV design improves balance
• Proven 389cc displacement maximizes engine density
• Economic 3.5 Lph fuel rate maintains efficiency
• High 26.4 Nm torque handles industrial loads
• Standard 1-inch keyed shaft mounts industrial pulleys
• Reliable manual recoil starter ensures rapid ignition
• Integrated forced air cooling prevents engine overheating