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Honda GX Series Horizontal OHV Engine — 98cc, 3/5in. x 1in. Shaft, Model# GX100UKRMB
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Honda GX Series Horizontal OHV Engine — 98cc, 3/5in. x 1in. Shaft, Model# GX100UKRMB

Item# 44250
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Only $479.99

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Manufacturer's Warranty: 3 year limited warranty

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Product Summary

The Honda 120cc 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 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.

What's Included

  • (1) Engine, Model# GX100UKRMB

Features + Benefits

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  • Honda 120cc 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#44250
Ship Weight32.0 lbs
Engine Displacement (cc)98
Start TypeRecoil
ApplicationRammer
Engine TypeGX series OHV commercial-duty
Torque (ft./lbs.)4.2 @ 3,600 RPM
Shaft OutputHorizontal
CrankshaftK-type
Shaft Diameter (in.)3/5
Shaft Length (in.)1
Shaft Keyway (in.)0.5 x 0.2
Shaft End Tapped (Diameter (in.)/Threads per inch)M12 x 1.25
Shaft Rotation (From PTO Shaft Side)Counterclockwise
Bearing TypeBall
Cylinders (qty.)1
Cylinder BoreCast iron
Bore x Stroke (in.)2 3/16 x 1 9/16
Compression Ratio8.5:1
Cooling SystemAir cooled
Air Cleaner TypeDual element
Fuel TankNot included
Fuel TypeGasoline
Fuel FilterNot included
Oil Capacity (qt.)0.42
Lubrication SystemSplash
Low Oil AlertNo
Low Oil ShutdownNo
Ignition SystemTransistorized magneto
Governor SystemCentrifugal mechanical
CarburetorRammer floatless
Throttle ControlThrottle
Choke ControlThrottle
Max. RPM3,600
Muffler IncludedYes
Auto Compression ReleaseYes
Mounting Base L x W (in.)3.8 x 3.5
Dimensions L x W x H (in.)11 3/5 x 12 x 15 4/5
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 GX Series Horizontal OHV Engine — 98cc, 3/5in. x 1in. Shaft, Model# GX100UKRMB The price is $479.99.
Honda GX Series Horizontal OHV Engine — 98cc, 3/5in. x 1in. Shaft, Model# GX100UKRMB
(Not Yet Rated - New)
Item# 44250
In Stock Online
Only $479.99
Hide Similarities
Engine Displacement (cc)
118 118 50 118 98
Start Type
Recoil Recoil Recoil Recoil Recoil
Application Pressure washer, compressor, log splitter, chipper/shredder NonHonda water pumps Generators, pumps, tillers, small construction equipment Cement mixer, pump Rammer
Engine Type GX series OHV commercial-duty GX series OHV commercial-duty GXH series OHV commercial-duty GX series OHV commercial-duty GX series OHV commercial-duty
Rated Power (HP) 3.5 3.5 2.1 3.5 -
Torque (ft./lbs.)
5.40 at 2,500 RPM 5.40 at 2,500 RPM 2.00 at 4,500 RPM 5.40 at 2,500 RPM 4.2 @ 3,600 RPM
Shaft Output
Horizontal Horizontal Horizontal Horizontal Horizontal
Crankshaft Q-type T type - H type K-type
Shaft Diameter (in.) 3/4 5/8 (threaded) 5/8 3/4 3/5
Shaft Length (in.) 2 7/16 2 7/16 1 1/4 2 3/32 1
Shaft Keyway (in.)
3/16 - - 1/4 0.5 x 0.2
Shaft End Tapped (Diameter (in.)/Threads per inch) 5/16–24 - 1/4–28 - 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 4 11/64 3 11/32 4 11/64 -
Bearing Type
- - - - 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 2.4 x 1.7 1.65 x 1.42 2.4 x 1.7 2 3/16 x 1 9/16
Compression Ratio
8.5:1 8.5:1 8.0:1 8.5:1 8.5:1
Cooling System
Air cooled Air cooled Air cooled Air cooled Air cooled
Air Cleaner Type
Dual element Dual element Semidry Dual element Dual element
Fuel Tank - - - - Not included
Fuel Type Gasoline Gasoline Gasoline Gasoline Gasoline
Fuel Tank Capacity (qt.) 2.1 2.1 0.81 2.1 -
Fuel Filter
- - - - Not included
Oil Capacity (qt.)
0.59 0.59 0.26 0.59 0.42
Lubrication System
Forced splash Forced splash Forced splash Forced splash Splash
Low Oil Alert
Yes Yes No 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 Float Rammer floatless
Throttle Control
Remote (wire) Manual Manual Remote (wire) Throttle
Choke Control
Manual Manual Manual Manual Throttle
Max. RPM
3,600 3,600 7,600 3,600 3,600
Muffler Included
Yes, (standard, spark arrestor) Yes, (standard) Yes Yes, (standard) Yes
Auto Compression Release
Yes Yes Yes Yes Yes
Bolt Circle (in.) 3 5/8 3 5/8 4 11/64 3 5/8 -
Mounting Base L x W (in.)
6 3/8 x 3 5/32 to 3 11/32 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 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 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 11 3/5 x 12 x 15 4/5
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes