Description
The Mould King 10193 Horizontal Opposed Boxer Engine Model is a fantastic addition to any brick-building enthusiast’s collection, especially for those with a passion for engineering and mechanics. This set, consisting of 609 pieces, offers a detailed and functional replica of a boxer engine, complete with moving parts powered by an included XL motor and battery box. As a STEM-focused kit, it’s both educational and entertaining, making it a great choice for builders aged 14 and up.
Parts and Quality
The set includes 609 pieces, which are well-crafted and compatible with other major brick brands like LEGO. The pieces are primarily in shades of gray, silver, and red, with some yellow and green accents for added realism. The quality of the bricks is impressive, with a good snap-fit and no noticeable issues with loose or overly tight connections. The inclusion of the XL motor and battery box is a highlight, as they bring the model to life—allowing the fan and belts to move, simulating the engine’s operation. However, some of the smaller pieces, like the belts and connectors, can be a bit fiddly to handle, so patience is key during assembly.
Difficulty of the Build
The build difficulty is moderate, making it suitable for intermediate builders. The instructions are clear, with step-by-step diagrams that guide you through the process. However, the complexity of the engine’s moving parts—like the belt-driven fan and the piston mechanism—can be challenging for those new to mechanical builds. It took me about 3-4 hours to complete, and I found the process rewarding as the engine slowly came together. Younger builders or those less experienced might need adult supervision, especially when connecting the motor and ensuring the belts are properly aligned to avoid slippage.
Overall Experience
This set strikes a great balance between fun and education. Watching the engine “run” after completion is incredibly satisfying, and the model looks impressive on display with its sleek design and realistic details. The dimensions (18.1 cm x 13.9 cm x 12.3 cm) make it a compact yet eye-catching piece. My only minor critique is that the belts can occasionally slip if not tensioned correctly, but this can be fixed with some adjustments. For the price, it’s a solid value, offering hours of engagement and a functional model to show off.
If you’re looking to add this impressive boxer engine model to your collection, you can purchase it through this affiliate link: here.
Starr Lheureux –
The model was delivered very quickly and was very well packaged in the original box. Everything seems to be complete, highly recommended.
Kemberly Roza –
* * Fixed, class motorized boxer engine from Mould King 10193 as shown, again * *
Niam Mullins –
I like it not bad at all
Takako Ream –
The delivery was quick, but the cylinders couldn’t rotate properly. And another thing, the white rubber is torn when switched on.
Néo Lortie –
* * Fixed, class motorized boxer engine from Mould King 10193 as shown, again * *
Lakisha Mullenix –
I like it not bad at all




Reiko Jeanlouis –
The delivery was quick, but the cylinders couldn’t rotate properly. And another thing, the white rubber is torn when switched on.
Adella Tarry –
The model was delivered very quickly and was very well packaged in the original box. Everything seems to be complete, highly recommended.