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Honda GX Series Horizontal OHC Engine — 98cc, 3/5in. x 1in. Shaft, Model# GX100RTKRMB

Item# 44250
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Honda GX Series Horizontal OHC Engine — 98cc, 3/5in. x 1in. Shaft, Model# GX100RTKRMB

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Was $479.99
Sale $454.99

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  • Honda 98cc GX OHC 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
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Product Summary

The Honda 120cc GX Series OHC 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

  • Honda 98cc GX OHC 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
Item# 44250
Brand Honda Engines
Manufacturer's Warranty 3 year limited warranty
Ship Weight 32.0 lbs
Engine Displacement (cc) 98
Start Type Recoil
Application Rammer
Engine Type GX series OHC commercial-duty
Net Power Output (HP) 2.8 (2.1 kW) at 3,600 RPM
Net Torque (lbs./ft.) 4.2 (5.7 Nm) at 3,600 RPM
Shaft Output Horizontal
Crankshaft K-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
PTO Height (in.) 4 11/64
Bearing Type Ball
Cylinders (qty.) 1
Cylinder Bore Cast iron
Bore x Stroke (in.) 2 3/16 x 1 9/16
Compression Ratio 8.5:1
Cooling System Air cooled
Air Cleaner Type Dual element
Fuel Tank Not included
Fuel Type Gasoline
Fuel Pump Diaphragm pump
Fuel Filter Not included
Oil Capacity (qt.) 0.42
Lubrication System Splash
Low Oil Alert No
Low Oil Shutdown No
Ignition System Transistorized magneto
Governor System Centrifugal mechanical
Carburetor Rammer floatless
Throttle Control Throttle
Choke Control Throttle
Max. RPM 3,600
Muffler Included Yes
Auto Compression Release Yes
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

Customer Reviews

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Replacement Parts
Call To Order: 1-800-657-0516

Mon - Fri 7:00 AM - 6:00 PM (Central)
Sat 7:00 AM - 3:00 PM (Central)

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Honda GX Series Horizontal OHC Engine — 98cc, 3/5in. x 1in. Shaft, Model# GX100RTKRMB The price is $454.99.
Honda GX Series Horizontal OHC Engine — 98cc, 3/5in. x 1in. Shaft, Model# GX100RTKRMB
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Item# 44250
In Stock Online
Was $479.99
Sale $454.99
Save $25.00
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Hide Similarities
Engine Displacement (cc)
35.8 118 49.4 98 118
Start Type
Recoil Recoil Recoil Recoil Recoil
Application Earth auger, trimmer, Graco paint striper Pressure washer, compressor, log splitter, chipper/shredder Generator, pump, tiller, small construction equipment Rammer Cement mixer, pump
Engine Type GX series 4-stroke OHC GX series OHV commercial-duty GXH series OHV commercial-duty GX series OHC commercial-duty GX series OHV commercial-duty
Net Power Output (HP) - 3.5 (2.6 kW) at 3,600 RPM 2.1 (1.6 kW) at 7,000 RPM 2.8 (2.1 kW) at 3,600 RPM 3.5 (2.6 kW) at 3,600 RPM
Net Torque (lbs./ft.) - 5.4 (7.3 Nm) at 2,500 RPM 2.0 (2.7 Nm) at 4,500 RPM 4.2 (5.7 Nm) at 3,600 RPM 5.4 (7.3 Nm) at 2,500 RPM
Shaft Output
Horizontal Horizontal Horizontal Horizontal Horizontal
Crankshaft With clutch Q-type - K-type H type
Shaft Diameter (in.) Clutch 3/4 5/8 3/5 3/4
Shaft Length (in.) Crank/piston assembly 2 7/16 1 1/4 1 2 3/32
Shaft Keyway (in.)
- 3/16 - 0.5 x 0.2 1/4
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.)
3.9 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.)
1 17/32 x 1 3/16 2.4 x 1.7 1.65 x 1.42 2 3/16 x 1 9/16 2.4 x 1.7
Compression Ratio
8:1 8.5:1 8.0:1 8.5:1 8.5:1
Cooling System
Air Air cooled Air cooled Air cooled Air cooled
Air Cleaner Type
Semi-dry Dual element Semidry Dual element Dual element
Fuel Tank Yes - - Not included -
Fuel Type Gasoline Gasoline Gasoline Gasoline Gasoline
Fuel Tank Capacity (qt.)
0.67 2.1 0.81 - 2.1
Fuel Pump Yes - - Diaphragm pump -
Fuel Filter Yes - - Not included -
Oil Capacity (qt.)
0.106 0.59 0.26 0.42 0.59
Lubrication System
Crankcase pressure driven Forced splash Forced splash Splash Forced splash
Low Oil Alert
- Yes No No Yes
Low Oil Shutdown
- Yes - No Yes
Ignition System
Transistorized magneto Electronic Electronic Transistorized magneto Electronic
Governor System
- Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical Centrifugal mechanical
Carburetor
Diaphragm (overflow return) Float Float Rammer floatless Float
Throttle Control
Manual Remote (wire) Manual Throttle Remote (wire)
Choke Control
Manual Manual Manual Throttle Manual
Max. RPM
7,000 3,600 7,600 3,600 3,600
Muffler Included
Yes Yes, (standard, spark arrestor) Yes Yes Yes, (standard)
Auto Compression Release
Yes Yes Yes Yes Yes
Bolt Circle (in.)
3.5 3 5/8 4 11/64 - 3 5/8
Mounting Base L x W (in.)
2.78 x 2.78 6 3/8 x 3 5/32 to 3 11/32 4 3/4 x 2 1/8 3.8 x 3.5 6 3/8 x 3 5/32 to 3 11/32
Dimensions L x W x H (in.)
8 x 9 1/5 x 9 2/5 12 x 13 3/8 x 12 1/2 8 7/8 x 10 13/16 x 13 11 3/5 x 12 x 15 4/5 12 x 13 3/8 x 12 1/2
EPA/CARB Approval (California Air Resource Board)
Yes Yes Yes Yes Yes