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Honda GX50 S3 Mini 4-Stroke Horizontal Engine

The Honda GX50 S3 Mini 4-Stroke Horizontal Engine combines commercial-grade performance with a compact, lightweight design. Its 47.9cc air-cooled, single-cylinder OHC engine delivers 2.0 HP at 7,000 rpm and 2.2 Nm of torque at 5,000 rpm, making it suitable for demanding lawn and garden equipment, cultivators, construction machinery, agricultural tools, pumps, and other portable applications.

Key Specifications

Specification Details
Model GX50NTS3 / GX50 S3
Engine type Air-cooled four-stroke, single-cylinder OHC
Configuration Horizontal, clutch-ready
Displacement 47.9cc
Bore × stroke 43 × 33 mm
Net power 2.0 HP (1.47 kW) at 7,000 rpm
Maximum net torque 1.6 lb-ft (2.2 Nm) at 5,000 rpm
Compression ratio 8.0:1
Starting system Recoil starter
Ignition system Transistorized magneto
Carburetor Diaphragm type with overflow return
Fuel Unleaded gasoline, 86 octane or higher
Fuel-tank capacity 0.67 US qt / 0.63 liter
Oil capacity 4.4 US oz / 130cc
Lubrication Crankcase pressure-driven rotary-slinger system
Air cleaner Dry-paper type
PTO rotation Counterclockwise from PTO side
Operating positions Full 360° operation
Dimensions 199 × 260 × 263 mm
Dry weight 9.1 lb / 4.1 kg
Low-oil shutdown No
Muffler Included

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