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Honda Horizontal OHV Engine — 118cc, GX Series, 3/4in. x 2 7/16in. Shaft, Model# GX120UT2QXC9
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Honda Horizontal OHV Engine — 118cc, GX Series, 3/4in. x 2 7/16in. Shaft, Model# GX120UT2QXC9

Item# 44251
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Only $429.99

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Manufacturer's Warranty: 3 year limited warranty

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Product Summary

The Honda 118cc GX Series OHV commercial-grade engine is designed for the most demanding commercial applications. It has set an industry standard for reliability and durability. Overhead Valve design offers cooler, fuel-efficient operation and cast iron cylinder sleeve provides longer service life. The GX is reliable, easy starting and quiet running. Meets EPA and CARB emission levels standards. This legendary engine has earned the reputation as the preferred engine for construction equipment. Common applications include pressure washers, compressors, go-karts, log splitters and chipper/shredders.

Features + Benefits

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  • Honda 118cc GX OHV air-cooled, 4-stroke, horizontal engine
  • Automatic decompression for easy starting
  • Heavy-duty ball bearing supported crankshaft
  • Double walled heavy-duty tank with in tank fuel strainer
  • 50-state compliant engine

Key Specs

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Item#44251
Ship Weight35.0 lbs
Engine Displacement (cc)118
Start TypeRecoil
ApplicationPressure washer, log splitter, tiller, cement mixer, pump, construction equipment
Engine TypeGX series OHV commercial-duty
Torque (ft./lbs.)5.4 @ 2,500
Shaft OutputHorizontal
CrankshaftQ-type
Shaft Diameter (in.)3/4
Shaft Length (in.)2 7/16
Shaft Keyway (in.)3/16
Shaft End Tapped (Diameter (in.)/Threads per inch)5/16–24
Shaft Rotation (From PTO Shaft Side)Counterclockwise
PTO Height (in.)4 11/64
Bearing TypeBall
Cylinders (qty.)1
Cylinder BoreCast iron
Bore x Stroke (in.)2.4 x 1.7
Compression Ratio8.5:1
Cooling SystemAir cooled
Air Cleaner TypeCyclone
Fuel TankYes
Fuel TypeGasoline
Fuel Tank Capacity (qt.)2.1
Fuel FilterFuel tank filler neck strainer
Oil Capacity (qt.)0.59
Lubrication SystemForced splash
Low Oil AlertYes
Low Oil ShutdownYes
Ignition SystemElectronic
Governor SystemCentrifugal mechanical
CarburetorFloat, inner vent
Throttle ControlRemote (wire)
Choke ControlManual
Max. RPM3,600
Muffler IncludedYes
Auto Compression ReleaseYes
Bolt Circle (in.)3 5/8
Mounting Base L x W (in.)6 3/8 x 3 5/32–3 11/32
Dimensions L x W x H (in.)12 x 13 3/8 x 12 1/2
EPA/CARB Approval (California Air Resource Board)Yes

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Extended Warranty

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Service Protection Plus

Manufacturer Warranty:
3 year limited warranty

Protect your purchase beyond the manufacturer's warranty
with Service Protection Plus!

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Honda Horizontal OHV Engine — 118cc, GX Series, 3/4in. x 2 7/16in. Shaft, Model# GX120UT2QXC9 The price is $429.99.
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Hide Similarities
Engine Displacement (cc)
118 50 118 118 98
Start Type
Recoil Recoil Recoil Recoil Recoil
Application Pressure washer, compressor, log splitter, chipper/shredder Generators, pumps, tillers, small construction equipment Pressure washer, log splitter, tiller, cement mixer, pump, construction equipment Cement mixer, pump Rammer
Engine Type GX series OHV commercial-duty GXH series OHV commercial-duty GX series OHV commercial-duty GX series OHV commercial-duty GX series OHV commercial-duty
Rated Power (HP) 3.5 2.1 - 3.5 -
Torque (ft./lbs.)
5.40 at 2,500 RPM 2.00 at 4,500 RPM 5.4 @ 2,500 5.40 at 2,500 RPM 4.2 @ 3,600 RPM
Shaft Output
Horizontal Horizontal Horizontal Horizontal Horizontal
Crankshaft Q-type - Q-type H type K-type
Shaft Diameter (in.) 3/4 5/8 3/4 3/4 3/5
Shaft Length (in.) 2 7/16 1 1/4 2 7/16 2 3/32 1
Shaft Keyway (in.)
3/16 - 3/16 1/4 0.5 x 0.2
Shaft End Tapped (Diameter (in.)/Threads per inch) 5/16–24 1/4–28 5/16–24 - M12 x 1.25
Shaft Rotation (From PTO Shaft Side) Counterclockwise Counterclockwise Counterclockwise Counterclockwise Counterclockwise
Gear Reduction - - - H type 6:1 -
PTO Height (in.) 4 11/64 3 11/32 4 11/64 4 11/64 -
Bearing Type
- - Ball - Ball
Cylinders (qty.)
1 1 1 1 1
Cylinder Bore
Cast iron Cast iron Cast iron Cast iron Cast iron
Bore x Stroke (in.)
2.4 x 1.7 1.65 x 1.42 2.4 x 1.7 2.4 x 1.7 2 3/16 x 1 9/16
Compression Ratio
8.5:1 8.0:1 8.5:1 8.5:1 8.5:1
Cooling System
Air cooled Air cooled Air cooled Air cooled Air cooled
Air Cleaner Type
Dual element Semidry Cyclone Dual element Dual element
Fuel Tank - - Yes - Not included
Fuel Type Gasoline Gasoline Gasoline Gasoline Gasoline
Fuel Tank Capacity (qt.) 2.1 0.81 2.1 2.1 -
Fuel Filter
- - Fuel tank filler neck strainer - Not included
Oil Capacity (qt.)
0.59 0.26 0.59 0.59 0.42
Lubrication System
Forced splash Forced splash Forced splash Forced splash Splash
Low Oil Alert
Yes No Yes Yes No
Low Oil Shutdown
Yes - Yes Yes No
Ignition System
Electronic Electronic Electronic Electronic Transistorized magneto
Governor System
Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical
Carburetor
Float Float Float, inner vent Float Rammer floatless
Throttle Control
Remote (wire) Manual Remote (wire) Remote (wire) Throttle
Choke Control
Manual Manual Manual Manual Throttle
Max. RPM
3,600 7,600 3,600 3,600 3,600
Muffler Included
Yes, (standard, spark arrestor) Yes Yes Yes, (standard) Yes
Auto Compression Release
Yes Yes Yes Yes Yes
Bolt Circle (in.) 3 5/8 4 11/64 3 5/8 3 5/8 -
Mounting Base L x W (in.)
6 3/8 x 3 5/32 to 3 11/32 4 3/4 x 2 1/8 6 3/8 x 3 5/32–3 11/32 6 3/8 x 3 5/32 to 3 11/32 3.8 x 3.5
Dimensions L x W x H (in.)
12 x 13 3/8 x 12 1/2 8 7/8 x 10 13/16 x 13 12 x 13 3/8 x 12 1/2 12 x 13 3/8 x 12 1/2 11 3/5 x 12 x 15 4/5
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes