Description
Overview:
This genuine Stihl flywheel is a direct replacement for worn or damaged units on selected two-stroke handheld tools, including the Stihl KW85 and HL75. Built from durable, finned aluminium alloy, it stores rotational energy to stabilise engine speed, smooth out power delivery, and support reliable starting. The fin design also helps move cooling air around the cylinder shroud during operation. Supplied to OEM specification under Part No. 4137 400 1200, it matches the original fit and performance, maintaining the balance and timing geometry required by the engine. Suitable for a wide range of Stihl brushcutters, hedge trimmers, blowers, pole pruners and Kombi engines listed below, it is a practical replacement for routine maintenance or repair to keep equipment working efficiently.
Key Features:
- Genuine Stihl part for assured fit and compatibility (OEM 4137 400 1200)
- Robust, corrosion-resistant aluminium alloy construction with cooling fins
- Helps maintain steady engine speed and smooth idle by storing rotational energy
- Precisely balanced to minimise vibration and reduce wear on bearings and mounts
- Direct-fit replacement on listed models; no modification required
- Supports reliable starting and consistent ignition performance when correctly installed
- Designed for frequent professional or domestic use in demanding conditions
- Easy to fit with standard workshop tools, helping reduce downtime
- Engineered to OEM standards for longevity and dependable service
- Suitable for routine servicing as part of preventative maintenance regimes
Typical Applications:
Used on Stihl handheld engines driving brushcutters, hedge trimmers, blowers, Kombi tools and attachments. Replaces damaged or out-of-balance flywheels to restore smooth running, stable idle, and dependable acceleration. Ideal during engine overhauls, crankshaft or ignition servicing, or when poor running is traced to a chipped or cracked flywheel.
Also known as:
Engine flywheel, magneto rotor, ignition rotor, rotor, fan wheel, starter flywheel, crankshaft flywheel, engine rotor.
Fits Models:
BG75, FC73, FC75, FC85, FH75, FR85, FR85T, FS75, FS80, FS80R, FS85, FS85R, FS85RX, FS85T, HL75, HL75K, HS75, HS80, HS85, HT70, HT70K, HT75, KA85R, KA85R Attachment, KM85, KM85R, KR85, KR85 Attachment, KW85, SP80, SP80K, SP81, SP85, SP85K
Alternate Part Numbers:
4137 400 1200, 41374001200
Product Specifications
| L&S Part No. | 4137 400 1200 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41374001200 |
| Unit of Sale | 1 |
| Machine Type | Brushcutters, Hedgetrimmers, Pole Pruners, Kombi Engines |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl part, OEM 4137 400 1200 - Durable aluminium alloy with cooling fins - Direct-fit replacement for listed models - Maintains engine speed and smooth idle - Suitable for Stihl brushcutters, hedge trimmers, blowers |
| Fits Models | FS75, FS80, FS85 | HS75 | BG75 | FR85T, FR85 | HT70, HT70K, HT75 | KM85, KM85R | KA85R Attachment | KR85 Attachment | KW 85 | FC 73 | FC 75 | FC 85 | HL75, HL75K | HS80 | HS85 | SP 85 |
