Description
Overview:
This Drive Pinion is a genuine Stihl replacement gear for long‐reach hedgetrimmers, designed to transfer engine power reliably to the cutter mechanism. Built from durable metal and precision‐made for a tight, accurate fit, it helps maintain smooth drive and consistent blade movement. It is intended for Stihl machines such as the HL 94 C‐E and HL 94 KC‐E, among other compatible models. By replacing a worn or damaged pinion, you restore clean cutting performance, reduce vibration, and protect adjoining components from premature wear. OEM No. 4243 640 2500 (MPN: 42436402500). A correct-fit drive pinion is essential for dependable day‐to‐day trimming, whether on domestic hedges or commercial maintenance routes.
Key Features:
- Genuine Stihl part for assured compatibility and performance (OEM No. 4243 640 2500, MPN 42436402500)
- Precision‐engineered teeth for smooth power transfer and reduced wear on the drive train
- Durable metal construction for long service life in regular professional or DIY use
- Helps restore cutting accuracy and reduces slippage when the original gear is worn or chipped
- Exact replacement fit; no modifications required when installed to manufacturer guidance
- Supports efficient trimming by maintaining consistent blade speed and engagement
- Suitable for a wide range of Stihl long‐reach hedge trimmers, including HL‐KM and HLA 135 K
- Backed by Stihl's OEM quality control for reliable operation and repeatable results
Typical Applications:
Used to replace a worn or damaged drive gear within the hedgetrimmer head, ensuring effective power transmission from the engine/gearbox to the blades. Ideal for routine maintenance by landscapers, grounds teams, arborists, and homeowners who need reliable, precise trimming on hedges, shrubs, and boundary vegetation.
Also known as:
Drive gear, pinion gear, transmission gear, cog, cutter drive gear. These terms describe the same internal gear component that engages with mating gears to drive the hedge trimmer blades.
Fits Models:
HL 56 K, HL 91 K, HL 91 KC, HL 91 KC-E, HL 94, HL 94 C, HL 94 C-E, HL 94 K, HL 94 KC, HL 94 KC-E, HL-KM, HL-KM 0 deg, HL56K, HL91K, HL91KC, HL91KC-E, HL91KCE, HL94, HL94C, HL94C-E, HL94CE, HL94K, HL94KC, HL94KC-E, HL94KCE, HLA 135 K, HLA135K, HLKM
Alternate Part Numbers:
4243-640-2500, 42436402500
Product Specifications
| L&S Part No. | 4243 640 2500 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 42436402500 |
| Unit of Sale | 1 |
| Machine Type | Hedgetrimmers |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl part ensures compatibility (OEM No. 4243 640 2500) - Precision-engineered teeth for smooth power transfer - Durable metal construction for long service life - Exact replacement fit; no modifications needed - Suitable for various Stihl long-reach hedge trimmers |
| Fits Models | HL-KM 0 deg | HL56K | HL91K, HL91KC | HL94, HL94C, HL94K, HL94KC | HL 0° |
Reviews
Ask a Question
Compatibility
Customers also bought
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£78.14 £65.12 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£79.52 £66.27
Related Products
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£78.14 £65.12 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£79.52 £66.27
