Description
Overview:
The Drive Pinion for Stihl hedge trimmers is a genuine replacement gear that transmits drive within the cutter gearbox to keep the blades moving smoothly. Made from durable metal for long service life, it is engineered for the operating loads seen in professional and domestic trimming. This pinion meshes with the mating gears to maintain consistent blade motion and clean cutting performance. It suits petrol hedge trimmers in the HS81/HS82/HS86 family, including HS81R and HS81RC. Manufacturer Part Number (MPN): 4237 642 0400. As a Genuine Stihl Part, it offers correct fit, reliable operation and compatibility with the specified models when refurbishing a worn or noisy gearhead.
Key Features:
- Genuine Stihl OEM part for accurate fit and dependable performance
- Precision-machined tooth profile for smooth gear engagement and reduced wear
- Durable metal construction designed for extended service life under load
- Direct replacement for worn or damaged pinions; no modifications required
- Helps restore steady blade drive and consistent cutting quality
- Compatible with HS81, HS82 and HS86 series gearboxes (see model list)
- Supports routine maintenance and cost-effective overhaul of the gearhead
- Suitable for both professional and domestic hedge trimming duties
Typical Applications:
Used during gearbox repairs or service on Stihl hedge trimmers when the original pinion shows wear, chipped teeth, excessive backlash, or noise under load. Common in routine overhauls for landscaping contractors, grounds teams, estate maintenance and homeowners who operate HS81/HS82/HS86 series machines regularly.
Also known as:
Pinion gear, gear wheel, cogwheel, spur gear, output gear, transmission pinion, cutter drive pinion, gearbox pinion.
Fits Models:
HS 81 R, HS 81 RC, HS 81 T, HS 81 TC, HS 82, HS 86 R, HS 86 T, HS81, HS81R, HS81RC, HS81T, HS81TC, HS82, HS86, HS86R, HS86T
Alternate Part Numbers:
4237-642-0400, 42376420400
Product Specifications
| L&S Part No. | 4237 642 0400 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42376420400 |
| Unit of Sale | 1 |
| Machine Type | Hedgetrimmers |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl OEM part ensures accurate fit and performance - Precision-machined tooth profile reduces wear and ensures smooth operation - Durable metal construction for extended service life - Compatible with HS81, HS82, and HS86 series gearboxes - Direct replacement requires no modifications for installation |
| Fits Models | HS81, HS86 | HS82 |
Reviews
Ask a Question
Compatibility
Customers also bought
-
![]()
Bumper Strip for Stihl 084, 044 - 1121 648 6610£2.05 £1.71
