Products Description
TL43/CG430/40-5/TL52/CG520/44-5 Brush Cutter Flywheel
Precision Ignition & Cooling Component for 43–52cc Brushcutters
The flywheel is a critical engine component for TL43, CG430, 40-5, TL52, CG520, 44-5, and compatible 43–52cc brushcutters. Mounted on the crankshaft, this magnetic flywheel serves three essential functions: generating electrical current for the ignition system via its embedded magnets, providing cooling airflow through integrated fins, and maintaining rotational inertia for smooth engine operation .
A damaged or worn flywheel can cause hard starting, misfiring, excessive vibration, or engine overheating due to reduced cooling airflow. This replacement flywheel restores proper ignition timing, reliable starting, and efficient engine cooling for demanding landscaping and grounds maintenance applications .
Technical Profiles & Materials
Magnetic Ignition Integration – The flywheel incorporates permanent magnets that work with the ignition coil to generate the high-voltage spark required for combustion. The flywheel is part of the magneto flywheel ignition system, which is standard for these 2-stroke engines .
Precision Balance & Cooling Design – Precision-engineered construction ensures balanced rotation, reducing engine vibration and improving overall efficiency. The flywheel features integrated cooling fins that draw air over the engine cylinder during operation, maintaining safe operating temperatures and preventing overheating .
Durable Aluminum Alloy Construction – Manufactured from lightweight yet durable aluminum alloy, offering excellent heat resistance, corrosion resistance, and long service life under demanding conditions. The robust construction withstands the high temperatures and vibration common in professional brushcutter use .
Standard 110mm Diameter Specification – The flywheel measures approximately 110mm in outer diameter, which is the standard specification for 43–52cc brushcutter engines. It features inner diameters of 11mm and 14mm, with a height of 42mm for precise fitment on the crankshaft .
Broad Model Compatibility – Fits a wide range of 43cc and 52cc brushcutters, including :
CG Series: CG430, CG520
Other Models: TL43, TL52, 40-5, 44-5, BC430, BC520
Engines: 1E40F-5 (42.7cc), 1E44F-5 (51.7cc)
Additional Compatibility: GX35, 139/140, BG430, and other 43–52cc platforms
Easy Installation – Designed as a direct bolt-on replacement requiring basic workshop tools. The flywheel attaches to the crankshaft with the Woodruff key ensuring correct timing orientation .
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Outer Diameter | 110mm |
| 2 | Inner Diameters | 11mm and 14mm |
| 3 | Height | 42mm |
| 4 | Material | Aluminum Alloy |
| 5 | Compatible Engine Displacement | 43cc – 52cc (42.7cc – 51.7cc) |
| 6 | Engine Models | 1E40F-5 (42.7cc, 1.25kW), 1E44F-5 (51.7cc, 1.47kW) |
| 7 | Ignition Type | Magneto flywheel ignition |
| 8 | Function | Ignition timing, engine cooling, rotational inertia |
| 9 | Compatible Models | TL43, CG430, 40-5, TL52, CG520, 44-5, BC430, BC520 |
| 10 | Unit of Sale | 1 piece |
Products Application
Engine Performance Restoration
Direct replacement when the original flywheel becomes damaged, the magnets weaken, or the cooling fins break. Symptoms of a faulty flywheel include hard starting, weak or no spark, misfiring, excessive vibration, or engine overheating. This replacement restores proper ignition timing and cooling airflow, ensuring reliable engine operation .
Ignition System Repair
The flywheel is a critical component of the magneto flywheel ignition system common to 2-stroke brushcutter engines . If the ignition coil produces no spark after checking the wiring and stop switch, the flywheel magnets may be weakened or damaged. Replacing the flywheel restores the magnetic field required for spark generation and consistent engine starting.
Preventative Maintenance
For professional landscapers and grounds maintenance crews, replacing the flywheel proactively during scheduled engine overhauls prevents unexpected field failures. The durable aluminum construction ensures long service life, but the flywheel should be inspected for damaged cooling fins, scoring, or weakened magnets during routine servicing.
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm this flywheel fits my brushcutter?
A:Check your machine model number on the identification plate and measure your existing flywheel diameter (110mm is standard). This flywheel is compatible with TL43, CG430, 40-5, TL52, CG520, 44-5, BC430, BC520, and compatible 43–52cc brushcutters. It is suitable for 1E40F-5 (43cc) and 1E44F-5 (52cc) engine platforms .
Q: What are the symptoms of a faulty flywheel?
A: Common symptoms include hard starting, weak or no spark from the ignition coil, misfiring under load, excessive engine vibration, or engine overheating due to broken cooling fins. A damaged flywheel can also cause incorrect ignition timing, leading to poor performance and potential engine damage .
Q: What is the function of the cooling fins on the flywheel?
A: The integrated cooling fins act as a fan, drawing air over the engine cylinder during operation. This airflow helps regulate engine temperature and prevents overheating during extended use. Damaged or broken cooling fins can cause the engine to overheat, leading to reduced performance and potential engine seizure .
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