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

Displacement 17.5cc 20.5cc (17% increase) Valve Mechanism OHV (Overhead Valve) OHV (Overhead Valve) Cylinders Inline 4-cylinder Inline 4-cylinder Cylinder Diameter 16.7mm 18.5mm Stroke 19.5mm 19mm (Slightly shorter, more stable performance) RPM Range 1500 – 8000rpm 1800 – 11500rpm (Higher RPM, better for high performance) Power Output About 2.5 horsepower (ps) About 3.6 horsepower (ps, 45% increase) Cooling System Water cooling Water cooling Starting Mode Electronic starting Electronic starting Ignition Method CDI Ignition CDI Ignition Lubrication System Independent lubrication system Improved independent lubrication system Recommended Fuel 92# gasoline and above 92# gasoline and above Recommended Oil 2T or 4T engine oil (10W50 recommended) 2T or 4T engine oil (10W50 recommended) Suitable Models Suitable for 1/10 RC models, light off-road trucks Suitable for 1/8, 1/10 RC models, off-road trucks, tractors, boats, etc. Product Dimensions 13.5 x 10.24 x 10.5 cm 13.5 x 10.2 x 10.5 cm Product Weight 1300g 1300g Package Dimensions 20 x 20 x 20 cm 20 x 20 x 20 cm Package Weight 2200g 2000g Recommended Age 14+ years 16+ years Color Red Blue

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