Description
Overview:
This Ignition Module is a genuine Stihl OEM spare designed for two‐stroke petrol chainsaws, including the MS 231 and MS 251. It replaces a failed or weak ignition unit to restore a strong, reliable spark and consistent timing. The module features a moulded, resin‐encapsulated body with a laminated steel core, built to resist vibration, heat and moisture inside the saw's engine housing. It mounts by the flywheel and is triggered by the flywheel magnets to generate high voltage for the spark plug. Supplied to Stihl specification under MPN 1143 400 1307, it maintains factory performance and starting behaviour while helping reduce misfires and erratic running. Suitable for regular maintenance or as a dependable fix for no‐spark and hard‐start faults on compatible Stihl models.
Key Features:
- Genuine Stihl part (OEM) for assured fit and performance
- Designed for consistent cold and hot starting on two‐stroke engines
- Resin‐potted coil and steel laminations for durability in harsh conditions
- Stable ignition timing for smoother idle and cleaner throttle response
- Direct replacement for the original module on listed models
- Electronic design with no mechanical points to adjust
- Helps resolve no‐spark, weak‐spark and intermittent misfire issues
- Compact, factory‐style form factor for neat installation under the cover
- Built to handle engine vibration, dust and moisture typical of chainsaw use
- Supports efficient running when using correct plug gap and service schedule
Typical Applications:
Used to restore reliable ignition on Stihl chainsaws that are hard to start, cut out when hot, misfire under load, or show no spark. Ideal for routine overhaul on high‐hour machines, seasonal service before intensive cutting, and as a preventative replacement to minimise downtime on site or in the workshop.
Also known as:
Ignition coil, magneto coil, ignition armature, CDI unit (capacitor discharge ignition unit), electronic coil pack, spark ignition unit, trigger module.
Fits Models:
MS 230, MS 230 C, MS 231, MS 231 C, MS 250, MS 250 C, MS 251, MS 251 C
Alternate Part Numbers:
1143-400-1307, 1143-400-1302, 1143 400 1302, 11434001302, 11434001307
Product Specifications
| L&S Part No. | 1143 400 1307 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 11434001307 |
| Unit of Sale | 1 |
| Applications | MS 231, MS 231 C, MS 251, MS 251 C, MS230, MS230C, MS231, MS231C, MS250, MS250C, MS251, MS251C |
| Fits Brands | Stihl |
| Fits Models | MS230, MS230C | MS250, MS250C | MS231, MS251 |
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