Honda GXR120RT-KRGA Bomag Rammer Replacement Engine

Honda GXR120RT-KRGA Bomag Rammer Replacement Engine

Developed Specifically for Rammer Applications

Designed to power 110-lb. to 175-lb. rammers at multiple altitudes with ease.

More power than the GX100, with a compact, lightweight engine footprint for additional versatility in frame mounting

Fuel Efficient, High Output Operation

OHC design developed specifically for increased efficiency

Optimal power transfer for better fuel efficiency

Smooth Performance

Precision engineered components result in lower vibration

Ball bearing supported crankshaft for greater stability

Exceptionally Quiet

New design reduces operation noise by 1dB over the original GX100

Compact exhaust system is 22mm narrower than the GX100, yet quieter

Maintenance-free, low-noise timing belt creates a smaller, lighter and quieter engine

Reduced mechanical noise due to light weight, noise-reducing materials

Forged steel crankshaft and rigid crankcase

Proven Reliability

A special cast-iron cylinder sleeve and a high carbon-steel, dual-ball bearing crankshaft provide improved engine strength for rammer applications.

The recoil starter and fan cover are even more robust through the incorporation of steel in the design.

Innovative lubrication system with a dual-breather chamber optimizes engine lubricating performance in most rammer operating conditions

Oil Alert

New carburetor chamber coating and carburetor filter help to protect against fuel impurities

High quality materials, fit, and finish

3-Year Limited Warranty

Easy to Use and Maintain

Simple throttle control

Easily accessible spark plug

Easy Starting

Heavy duty recoil starter

Ergonomic, easy to grip recoil rope design

Automatic mechanical de-compression system

Emissions Compliant

CARB and EPA compliant

No catalyst necessary 

Engine Type

Air-cooled 4-stroke OHC

Bore x Stroke

60 X 43 mm


121 cm3

Net Power Output*

3.6 HP (2.7 kW) @ 3,600 rpm

Net Torque

5.5 lb-ft (7.5 Nm) @ 2,500 rpm

PTO Shaft Rotation

Counterclockwise (from PTO shaft side)

Compression Ratio


Lamp/Charge coil options

Oil alert (LED not included)


Multiple options available

Ignition System

Transistorized magneto

Starting System


Lubrication System

Forced spray system

Governor System


Air cleaner

Multiple options available

Oil Capacity

0.29 US qt. (0.28 L)

Fuel Tank Capacity



Unleaded 86 octane or higher

Dry Weight

22.9 lbs. (10.4 kg)


Length (min)

10.2” (259 mm)

Width (min)

11.5” (294 mm)

Height (min)

11.4” (290 mm)

Power source Gas
Application Commercial
Condition New

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  • Views: 2614
  • Brand: Honda Power Equipment
  • Product Code: GXR120RT-KRGA Bomag Rammer Replacement Engine
  • Availability: In Stock
  • $569.95