Description
Overview:
The Gasket for Stihl FS40, FS50 Brushcutter (part number 4128 129 0900) is a genuine Stihl OEM sealing component for small two‐stroke Stihl machines. Made from durable, fuel‐ and heat‐resistant composite material, it sits between mating engine parts to prevent air and fluid leaks and to maintain correct compression and intake sealing. A sound gasket helps stabilise idle, improves starting, and supports overall engine efficiency. This thin, precision die‐cut gasket is designed for an accurate fit on popular models such as the FS40 and FS50, as well as a wide range of Stihl trimmers, blowers, hedge trimmers, and related tools. It is a direct replacement part that supports reliable day‐to‐day use and routine servicing on both domestic and professional equipment.
Key Features:
- Genuine Stihl OEM part for assured compatibility and reliability
- Precision fit to help maintain compression and prevent air and fuel leaks
- Durable composite material resists heat, fuel, and vibration in regular use
- Helps restore smooth running, easier starting, and consistent performance
- Thin, accurate profile for correct assembly stack and clearances
- Direct replacement with simple, clean installation during routine servicing
- Suitable for a wide range of Stihl brushcutters, blowers, and multi‐tools
- Supports long service life when installed with clean mating surfaces
Typical Applications:
Used when refitting or servicing intake, carburettor, cylinder, air box, or related engine interfaces on Stihl handheld equipment. Ideal whenever an old gasket is damaged, compressed, or leaking, or after disassembly during maintenance such as carburettor cleaning, diaphragm replacement, or cylinder work. Helps cure air leaks that cause poor idle, hard starting, or erratic running.
Also known as:
Intake gasket, cylinder base gasket, paper gasket, carburettor mounting gasket, sealing gasket, motor gasket, spacer gasket. Commonly referred to as a seal or washer in some parts lists.
Fits Models:
BG 56, BG 56 C, BG 66, BG 66 C, BG 86, BG 86 C, BG56, BG56C, BG66, BG66C, BG86, BG86C, BR 200, BR200, BT 120 C, BT 121, BT 121 Z, BT120C, BT121, BT121Z, FC 56, FC 56 C, FC 70, FC 70 C, FC56, FC56C, FC70, FC70C, FR 230, FR 230 T, FR 350, FR 450, FR 480, FR 480 C, FR230, FR230T, FR350, FR450, FR480, FR480C, FS 120, FS 120 R, FS 200, FS 200 R, FS 230, FS 250, FS 250 R, FS 300, FS 350, FS 36, FS 38, FS 380, FS 40, FS 40 C, FS 400, FS 44, FS 45, FS 45 C, FS 45 L, FS 450, FS 46, FS 46 C, FS 480, FS 50, FS 50 C, FS 55, FS 55 C, FS 55 R, FS 56, FS 56 C, FS 56 R, FS 56 RC, FS 70 C, FS 70 R, FS 70 RC, FS120, FS120R, FS200, FS200R, FS230, FS250, FS250R, FS300, FS350, FS36, FS38, FS380, FS40, FS400, FS40C, FS44, FS45, FS450, FS45C, FS45L, FS46, FS46C, FS480, FS50, FS50C, FS55, FS55C, FS55R, FS56, FS56C, FS56R, FS56RC, FS70C, FS70R, FS70RC, FT 250, FT250, HL 56 K, HL56K, HS 45, HS 52, HS45, HS52, HT 250, HT 56 C, HT250, HT56 C, HT56C, KA 120, KA 120 R, KA 250, KA120, KA120R, KA250, KA250 Attachment, KM 56 C, KM 56 RC, KM56C, KM56RC, MM 56, MM 56 MultiSystem, MM56, SH 56, SH 56 C, SH 86, SH 86 C, SH56, SH56C, SH86, SH86C, SP 200, SP 400, SP 450, SP 451, SP 481, SP200, SP400, SP450, SP451, SP481, SR 200, SR 200 D, SR 200 Z, SR 200-D, SR 200-Z, SR200, SR200D, SR200Z
Alternate Part Numbers:
4128-129-0900, 41281290900
Product Specifications
| L&S Part No. | 4128 129 0900 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41281290900 |
| Unit of Sale | 1 |
| Applications | BG 56, BG 56 C, BG 66, BG 66 C, BG 86, BG 86 C, BG56, BG56C, BG66, BG66C, BG86, BG86C, BR 200, BR200, BT 120 C, BT 121, BT 121 Z, BT120C, BT121, BT121Z, FC 56, FC 56 C, FC 70, FC 70 C, FC56, FC56C, FC70, FC70C, FR 230, FR 230 T, FR 350, FR 450, FR 480, FR 480 C, FR230, FR230T, FR350, FR450, FR480, FR480C, FS 120, FS 120 R, FS 200, FS 200 R, FS 230, FS 250, FS 250 R, FS 300, FS 350, FS 36, FS 38, FS 380, FS 40, FS 40 C, FS 400, FS 44, FS 45, FS 45 C, FS 45 L, FS 450, FS 46, FS 46 C, FS 480, FS 50, FS 50 C, FS 55, FS 55 C, FS 55 R, FS 56, FS 56 C, FS 56 R, FS 56 RC, FS 70 C, FS 70 R, FS 70 RC, FS120, FS120R, FS200, FS200R, FS230, FS250, FS250R, FS300, FS350, FS36, FS38, FS380, FS40, FS400, FS40C, FS44, FS45, FS450, FS45C, FS45L, FS46, FS46C, FS480, FS50, FS50C, FS55, FS55C, FS55R, FS56, FS56C, FS56R, FS56RC, FS70C, FS70R, FS70RC, FT 250, FT250, HL 56 K, HL56K, HS 45, HS 52, HS45, HS52, HT 250, HT 56 C, HT250, HT56 C, HT56C, KA 120, KA 120 R, KA 250, KA120, KA120R, KA250, KA250 Attachment, KM 56 C, KM 56 RC, KM56C, KM56RC, MM 56, MM 56 MultiSystem, MM56, SH 56, SH 56 C, SH 86, SH 86 C, SH56, SH56C, SH86, SH86C, SP 200, SP 400, SP 450, SP 451, SP 481, SP200, SP400, SP450, SP451, SP481, SR 200, SR 200 D, SR 200 Z, SR 200-D, SR 200-Z, SR200, SR200D, SR200Z |
| Machine Type | Brushcutters |
| Fits Brands | Stihl |
| Fits Models | FS36, FS40, FS44 | FS38, FS45, FS46 | FS40, FS50 | FS55, FS55C, FS55R | FS56, FS56C, FS56R | FS120, FS200, FS250 | FS300, FS350, FS380 | FS400, FS450, FS480 | BG56 | HS45 | BG66 | BG86 | BR200 | SH56, SH86 | FS70C, FS70R, FS70RC | FR230, FR230T | FR350, FR450, FR480, FR480C | HT56 C | FS230 | KM56C, KM56RC | KA120, KA120R, KA250 Attachment | MM 56 MultiSystem | FC 56 | FC 70, FC 70 C | SR 200 | SR 200-D | SR 200-Z | BT 120 C | BT 121 | BT 121 Z | HL56K | HS52 | SP 481 |
