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Honda Rammer Engine

Posted on July 25, 2013

Honda Engines has introduced the all-new model GXR120 general purpose gasoline engine, a model developed primarily for use on rammers. 

Offered as a second power option to the Honda’s existing GX100 engine, the new GXR120 engine has a displacement of 121 cc, thus the engine can appropriately power 110 lb. to 175 lb. rammers at multiple altitudes, Honda said. 

Additionally, a new, special cast-iron cylinder sleeve and a high carbon-steel, dual-ball bearing crankshaft are designed to provide improved engine strength for rammer applications.  To further enhance engine durability, the recoil starter and fan cover of the new GXR120 now are even more robust through the incorporation of steel in the design.

When developing the GXR120 for the rammer marketplace, Honda engineers identified the need for a more compact and lightweight engine footprint to allow for more versatility in frame mounting.  Using an overhead camshaft (OHC) orientation similar to the Honda GX100, Honda designers incorporated a maintenance-free, low-noise timing belt to create a smaller, lighter and quieter engine. 

Also with rammer operation in mind, Honda said it integrated several features into the design of the GXR120 to make it easier and comfortable to control.  To keep  noise levels low, the GXR120 includes a newly designed and compact muffler, which is 0.87 in. (22 mm) narrower than the muffler used as standard on the Honda GX100 engine.  

This smaller muffler, combined with the OHC engine layout, reduces operation noise by 1dB over the current GX100 engine.  In addition, the heavy-duty recoil starter, together with an automatic decompression system, allow for easier engine starting, while an oil alert feature prevents the engine from starting if the oil level is too low.  The lubrication system has a dual-breather chamber that optimizes engine lubricating performance in most rammer operating conditions.