CISON FL4-175 Flathead Inline 4-Cylinder Engine A 17.5cc 9000rpm Water Cooled Gasoline Model for RC Cars and Boats

Experience a masterpiece of miniature engineering with the CISON FL4-175, a 17.5cc water-cooled flathead engine designed for discerning model enthusiasts. This engine masterfully combines vintage design with modern performance, running on gasoline with a reliable CDI ignition. It is an exceptional power plant for RC cars and boats.

The main body of the engine is precision-machined from CNC aluminum, featuring a sandblasted oxidized finish that gives it a premium metal texture and a strong sense of mechanical artistry. Internally, it is built for durability and performance with components like bi-metal cast iron piston rings, a hardened cylinder liner, and a robust one-piece crankshaft.

A nod to classic automotive history, this model is a flathead engine, also known as a side-valve or valve-in-block engine. This design, where the valves are located within the engine block instead of the cylinder head, was a hallmark of early automotive manufacturing. The FL4-175 revives this classic configuration in a compact, powerful, and reliable package, offering a unique blend of retro mechanics and contemporary engineering.

Key Features:

High-Torque Performance: The engine's long-stroke and side-valve structure contribute to a lower center of gravity and lighter weight, enabling it to produce significant torque at lower RPMs for powerful and controlled performance.
Responsive and Powerful: Featuring stainless steel integrated intake and exhaust pipes and an independent single carburetor, this engine is easy to tune for a sensitive throttle response and a deep, powerful sound.
Durable and Efficient Operation: An external oil pump provides dedicated lubrication for the crankshaft, which can be paired with a mini oil filter for enhanced protection. The water-cooling system ensures stable operating temperatures for extended run times and a longer engine lifespan.
Reliable Ignition: The custom-developed four-cylinder electronic CDI igniter is compact, offers strong anti-interference capabilities, and provides stable ignition, making it highly compatible with modern RC electronics.

Upgrade Potential:

The oil pan includes a pre-reserved observation window, which can be modified with a transparent cover to allow for real-time viewing of the crankshaft in motion.
The flywheel end is designed to accommodate the installation of a simulated mechanical manual clutch, offering an upgrade path for advanced users.

RC Compatibility:

This lightweight engine is an incredible power source for various RC models. It is particularly well-suited as the "heart" for 1/8 and 1/10 scale RC crawlers and other vehicles that demand high torque.

A Collector's Item and Perfect Gift:

The CISON FL4-175 is a perfect addition to any collection of machine models or engines. It serves as an excellent choice for custom RC projects and makes a high-end, personalized gift for family, friends, and engineering enthusiasts.

Please Note: The base, CDI igniter, spark plugs, and oil filter are not included with the engine kit. For power, a 2S-3S (7.4V-12V) lithium battery is recommended. Please operate the engine according to the instruction manual to ensure proper function and prevent damage.

Specifications:

Brand: CISON
Model: FL4-175
Form: Assembly Version
Material: Metal
Cylinder Dimensions: 96 x 43mm
Weight: 1100g
Displacement: 17.5cc
Bore: 16.7mm
Stroke: 20.0mm
RPM Range: 1600-9000 RPM
Power: 2.5PS
Lubrication Method: Splash Lubrication and Independent Lubrication
Cooling Method: Water Cooling
Ignition Method: Four-Cylinder CDI Electronic Ignition
Starting Method: Electric Start
Recommended Power Supply: 6V-12V / 2S-3S Lithium Battery
Fuel Type: Gasoline
Recommended Age: 14+
Product Dimensions: 13.5 x 4.3 x 9cm
Product Weight: 1500g
Package Dimensions: 20 x 15 x 15cm
Package Weight: 1700g
Packing: Graphic Carton