Product Description
Honda GX120T3XQX2 – 3.5 HP 122cc Recoil Engine 3/4″ x 2.43″ Shaft
The Honda GX120T3XQX2 is a 3.5 HP commercial-grade horizontal shaft engine built on Honda’s proven 122cc GX Series platform. Designed for durability and smooth operation, this engine delivers reliable recoil starting, efficient fuel performance, and consistent torque for industrial and outdoor power equipment applications.
With a 3/4″ diameter x 2.43″ length keyed crankshaft, the GX120T3XQX2 is commonly used on pressure washers, generators, small construction equipment, tillers, pumps, and specialty machinery requiring compact and dependable horizontal shaft power.
Engine Specifications
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Engine Manufacturer: Honda
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Engine Model: GX120T3XQX2
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Engine Series: GX Commercial Series
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Engine Type: 4-Cycle, Air-Cooled, OHV Single Cylinder Gasoline Engine
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Horsepower: 3.5 HP (gross)
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Displacement: 122cc
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Bore x Stroke: 60 mm x 43 mm
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Compression Ratio: 8.5:1
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Fuel System: Carbureted
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Starting System: Recoil Start
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Shaft Orientation: Horizontal
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Crankshaft Diameter: 3/4″
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Crankshaft Length: 2.43″
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Crankshaft Keyway: 3/16″
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Crankshaft Thread: 5/16-24 UNF
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Lubrication System: Splash Lubrication
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Oil Capacity: 0.63 qt (0.6 L)
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Ignition System: Transistorized Magneto
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Cooling System: Air-Cooled
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Dry Weight: Approx. 28 lbs
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Emissions Compliance: EPA / CARB compliant (where applicable)
Key Features
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3.5 HP Commercial-Grade Power – Designed for industrial and professional equipment
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122cc OHV Engine Design – Efficient combustion with smooth torque delivery
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3/4″ × 2.43″ Keyed Crankshaft – Standard horizontal shaft configuration
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Recoil Start System – Simple, dependable manual starting
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Honda GX Series Reliability – Proven long-life engine platform
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Splash Lubrication System – Reduced complexity and easy maintenance
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Transistorized Magneto Ignition – Consistent spark and reliable performance
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Compact and Lightweight Design – Easy integration into small equipment
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Low Vibration Operation – Balanced crankshaft for smoother running
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Heavy-Duty Construction – Built for demanding job site and rental applications
Warranty
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Manufacturer: Honda
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Commercial Warranty: 3-Year Limited
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Consumer / Residential Warranty: 3-Year Limited
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Coverage subject to Honda factory warranty terms, proper installation and maintenance.
NO RETURNS OR EXCHANGES ON ENGINES. ALL ENGINE SALES ARE FINAL.
ALL ENGINES ARE BRAND NEW WITH FULL FACTORY WARRANTY.
KOHLER ENGINES ARE ELIGIBLE FOR A 1 YEAR EXTENDED WARRANTY WITH PURCHASE OF MAINTENANCE/SERVICE KIT.
