CISON L4 OHV 20.5cc Inline 4-Cylinder 4-Stroke Water-Cooled Gasoline Engine Model Kit-Speed Up to 11500rpm

CISON L4-26CC DIY Engine Assembly Kit, Miniature OHV Inline 4-Cylinder 4-Stroke Water Cooled Gasoline Engine Model for RC Car & Display Collection (Kit Version)

Features: 

.Immersive Mechanical Engineering Experience: Featuring hundreds of precision metal components, this L4 engine kit delivers a challenging inline-four assembly journey. Step-by-step construction reveals real mechanical structure and working principles.

.Compact Structure with Strong Output: Designed with large displacement idea, OHV valve system and long-stroke configuration, this mini L4 engine generates impressive torque from a compact inline four layout.

.Stable Operation System: Equipped with independent lubrication, external oil pump and wet water-cooling circulation to reduce running temperature and maintain consistent performance.

.Sensitive Throttle & Deep Exhaust Note: Stainless steel intake and exhaust are integrally formed. Single carburetor design enables smooth tuning, responsive acceleration and powerful low-frequency engine sound.

.Precision CNC Craftsmanship: Three-ring piston structure, hardened cylinder liner, reinforced crankshaft and sandblasted anodized finish ensure refined appearance and mechanical accuracy.

Note:
This engine product does not include the motor starter wiring harness module, CDI ignition unit, four spark plugs, oil filter, water-cooling accessories, base, battery, or charger. Please operate the engine strictly according to the instructions provided in the manual to avoid damage caused by improper use. If any questions arise during operation, please contact customer support for assistance.

Comparison: CISON L4-175 vs. CISON L4-205

Specifications: 

.Brand: CISON
.Model: L4-26CC
.Material: Metal
.Color: Red + Silver
.Product Form: KIT (Disassembled Parts) / Complete Unit
.Engine Type: Gasoline Internal Combustion Engine
.Valve Train Type: OHV
.Bore: 20.0mm
.Stroke: 20.5mm
.Displacement: 20.5cc
.Cylinder: Inline Four-Cylinder
.Stroke: Four-Stroke
.Speed: 1500-10000 rpm
.Power: Approx. 3.5ps
.Cooling Method: Water Cooling
.Starting Method: Electric Start
.Ignition Method: CDI Ignition
.Spark Plug Type: Imperial 1/4-32 ME8 Spark Plug
.Lubrication Method: Independent Lubrication System
.Fuel Type: Recommended 92# or higher gasoline
.Engine Oil Type: Recommended 4T 10W50 engine oil (25mL)
.Starting Power: Recommended 12V lithium battery
.Product Weight: 1300g
.Package Weight: 2000g
.Product Dimensions: 13.5 x 10.2 x 10.5cm
.Package Dimensions: 20 x 20 x 25cm
.Packing: Graphic Carton
.Age: 16+

Product Introduction: 

Following the strong market response to the CISON L4-175 released in November 2022 and the L4-205 launched in February 2025, the newly upgraded CISON L4-26CC Micro Inline Four-Cylinder Engine is now officially introduced. While continuing the classic strengths of the series, it achieves a significant leap in both power and user experience.
This engine inherits the family’s compact micro inline structure, balancing flexible installation with efficient space compatibility. It comes standard with electric start, triple piston rings, a wet water-cooling system, and an independent lubrication system. Combined with a four-in-one CDI direct ignition setup, it ensures smooth starting and stable operation.
Visually, it returns to a classic aesthetic design, featuring a red cylinder head cover paired with a silver engine block, offering both display appeal and collectible value. The newly integrated exhaust manifold delivers a more distinctive engine sound, while the upgraded independent carburetor allows easier tuning and significantly enhances operational smoothness and reliability.
Core performance has been comprehensively upgraded. Displacement increases from 20.5cc to 26cc, with both bore and stroke enlarged, resulting in over 20% higher power output. Compatibility with RC vehicle models is further improved, making it suitable for modification projects or display collections.
The product remains available in two versions: a KIT assembly edition and a fully pre-assembled version, meeting different preferences for hands-on building or ready-to-run applications.

Packing List:

.L4 Engine Parts *1set
.Instruction Manual *1

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