Description
Overview:
This Genuine Stihl insulator (MPN 4241 405 8000) is a factory OEM intake insulator for small petrol-powered machines such as the FS40 and FS40C. It is a moulded, fuel- and heat-resistant elastomer component that sits between the carburettor and engine to provide an airtight intake connection while isolating vibration. By reducing vibration transfer and preventing air leaks, it helps stabilise idle, improves throttle response, and protects surrounding parts from undue wear. Built to Stihl specifications for correct fit and alignment, this black insulator supports reliable starting and consistent performance across compatible trimmers, brushcutters, blowers, vacs and Kombi engines.
Key Features:
- Genuine Stihl OEM part for assured compatibility and reliability
- Durable, fuel- and heat-resistant elastomer construction
- Provides a tight intake seal to prevent air leaks and erratic running
- Dampens engine vibration to the carburettor for smoother operation
- Helps maintain correct carb alignment and consistent idle
- Reduces wear on surrounding engine and intake components
- Direct replacement for worn or cracked insulators
- Designed for quick, straightforward fitting with standard tools
- Supports easier starting and stable performance over time
Typical Applications:
Used during routine maintenance or repair of Stihl brushcutters, trimmers, blowers and vacuums to cure air leaks, unstable idle, poor acceleration or excessive vibration at the carburettor. Ideal when refurbishing engines after long service, seasonal storage, or ethanol-related rubber degradation.
Also known as:
Intake boot, carburettor insulator, manifold insulator, isolator, vibration damper, intake spacer, carb mount, rubber intake connector, engine isolation part.
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, FC 56, FC 56 C, FC 70, FC 70 C, FC56, FC56C, FC70, FC70C, FR 410 C, FR 460 TC, FR410C, FR460TC, FS 240, FS 240 C, FS 240 RC, FS 260, FS 260 C, FS 260 RC, FS 36, FS 360 C, FS 40, FS 40 C, FS 410 C, FS 44, FS 460 C, FS 460 RC, FS 50, FS 50 C, FS 56, FS 56 C, FS 56 R, FS 56 RC, FS 70 C, FS 70 R, FS 70 RC, FS240, FS240C, FS240RC, FS260, FS260C, FS260RC, FS36, FS360C, FS40, FS40C, FS410C, FS44, FS460C, FS460RC, FS50, FS50C, FS56, FS56C, FS56R, FS56RC, FS70C, FS70R, FS70RC, HL 56 K, HL56K, HT 56 C, HT56 C, HT56C, KM 56 C, KM 56 RC, KM56C, KM56RC, MM 56 MultiSystem, MM56MultiSystem, SH 56, SH 56 C, SH 86, SH 86 C, SH56, SH56C, SH86, SH86C, SR 200, SR 200-D, SR 200-Z, SR200, SR200-D, SR200-Z, SR200D, SR200Z
Alternate Part Numbers:
4241-405-8000, 42414058000
Product Specifications
| L&S Part No. | 4241 405 8000 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42414058000 |
| 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, FC 56, FC 56 C, FC 70, FC 70 C, FC56, FC56C, FC70, FC70C, FR 410 C, FR 460 TC, FR410C, FR460TC, FS 240, FS 240 C, FS 240 RC, FS 260, FS 260 C, FS 260 RC, FS 36, FS 360 C, FS 40, FS 40 C, FS 410 C, FS 44, FS 460 C, FS 460 RC, FS 50, FS 50 C, FS 56, FS 56 C, FS 56 R, FS 56 RC, FS 70 C, FS 70 R, FS 70 RC, FS240, FS240C, FS240RC, FS260, FS260C, FS260RC, FS36, FS360C, FS40, FS40C, FS410C, FS44, FS460C, FS460RC, FS50, FS50C, FS56, FS56C, FS56R, FS56RC, FS70C, FS70R, FS70RC, HL 56 K, HL56K, HT 56 C, HT56 C, HT56C, KM 56 C, KM 56 RC, KM56C, KM56RC, MM 56 MultiSystem, MM56MultiSystem, SH 56, SH 56 C, SH 86, SH 86 C, SH56, SH56C, SH86, SH86C, SR 200, SR 200-D, SR 200-Z, SR200, SR200-D, SR200-Z, SR200D, SR200Z |
| Machine Type | Brushcutters, Backpack Blowers, Blower/Shredders |
| Fits Brands | Stihl |
| Fits Models | FS36, FS40, FS44 | FS40, FS50 | FS56, FS56C, FS56R | FS240, FS260 | FS360C FS410C | FS460C, FS460RC | BG56 | BG66 | BG86 | BR200 | SH56, SH86 | FS70C, FS70R, FS70RC | FR410C, FR460TC | HT56 C | KM56C, KM56RC | MM 56 MultiSystem | FC 56 | FC 70, FC 70 C | SR 200 | SR 200-D | SR 200-Z | HL56K |
