Description
Overview:
This Piston Assembly 40 mm (1.57 inches) is a Genuine Stihl part designed to restore compression and smooth running in compatible two-stroke engines. Made from high-grade aluminium alloy for light weight and efficient heat transfer, it is built for durability under tough cutting conditions. It is engineered for a precise fit in Stihl chainsaws and brushcutters specified by the manufacturer, including the MS 230 and MS 230 C, helping to maintain reliable starting, strong power delivery, and lower fuel waste due to proper sealing. The 40 mm diameter matches the correct cylinder bore size on supported machines, making it suitable for routine overhauls or repairs when pistons show wear, scoring, or loss of ring seal. Ideal for professional and domestic users who need dependable performance.
Key Features:
- Genuine Stihl component for assured compatibility and performance
- 40 mm (1.57 inches) diameter for the specified cylinders on listed models
- Aluminium alloy construction for strength, low weight, and good heat dissipation
- Precision machining to help restore compression and reduce blow-by
- Supports easier starting and consistent engine power when fitted correctly
- Built for longevity in demanding cutting and clearing work
- Suitable for routine maintenance or full engine rebuilds
- Helps minimise vibration and wear when paired with a serviceable cylinder and bearings
Typical Applications:
Used during engine overhauls to replace a worn or damaged piston in compatible Stihl chainsaws and brushcutters. Common when diagnosing loss of compression, hard starting, low power, excessive smoke, or piston scoring. Suitable for preventative maintenance on frequently used machines to keep output stable and fuel use efficient.
Also known as:
Piston kit, 40 mm piston assembly, engine piston assembly, cylinder piston, two-stroke piston, replacement piston for Stihl 40 mm bore engines.
Fits Models:
021, 023, 025, FS 400, FS 450, FS 480, MS 230, MS 230 C, MS 250, MS 250 C, SP 400, SP 450
Alternate Part Numbers:
1123-030-2019, 11230302019
Product Specifications
| L&S Part No. | 1123 030 2019 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11230302019 |
| Unit of Sale | 1 |
| Machine Type | Chainsaws, Brushcutters |
| Fits Brands | Stihl |
| Key Features | - Genuine Stihl part ensures compatibility with specified models - 40 mm diameter fits Stihl MS 230, MS 230 C - Aluminium alloy for strength and efficient heat transfer - Precision machining restores compression and reduces blow-by - Suitable for engine overhauls and routine maintenance |
| Fits Models | MS230, MS230C | MS250, MS250C | FS400, FS450, FS480 | 021, 023, 025 |
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