Products Description
MS070 Chainsaw CDI Stator – Electronic Ignition Module
Ignition Stator for STIHL 070, 090 & MS720 Classic Saws
The CDI stator is an essential component of the electronic ignition system for large-displacement STIHL 070, 090, and MS720 chainsaws. Unlike older points-based systems, the stator works with the flywheel to generate the high-voltage spark needed for ignition. This replacement stator resolves issues like weak spark, hard starting, or a no-start condition in saws equipped with or being converted to electronic ignition. Note that factory electronic ignition for these models is rare, with most setups being aftermarket conversions.
Technical Profiles & Materials
OEM-Spec Electromagnetic Design – Primary resistance, secondary resistance, and inductance are engineered to original equipment standards, ensuring perfect compatibility with the flywheel and precise ignition timing.
Direct Fitment – Replaces OEM part number 1106 400 0705. Designed as a plug-and-play replacement with standardized connectors for quick installation.
Durable Construction – Features a corrosion-resistant metal core with a lightweight plastic housing that protects internal components from heat and vibration, operating reliably up to 150°C.
Complete Assembly – The stator module is often sold as a complete assembly including the ignition coil and high-voltage lead, providing a comprehensive electronic ignition solution.
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | OEM Part No. | 1106 400 0705 / 1106 404 3210 |
| 2 | Compatible Models | STIHL 070, 090, 090G, MS070, MS090, MS720 |
| 3 | Also Fits | 041, 051, 075, 076, Contra (certain versions) |
| 4 | Ignition Type | Electronic CDI (Capacitive Discharge Ignition) |
| 5 | Material | Plastic housing with metal core and copper wiring |
| 6 | Max Operating Temp | 150°C |
| 7 | Installation | Plug-and-play design with standardized connectors |
| 8 | Weight (Typical) | Approx. 270g |
Products Application
Classic Chainsaw Restoration
For collectors restoring STIHL 070 and 090 saws, the CDI stator is essential for converting points ignition systems to electronic ignition. The stator module replaces the original components and provides reliable spark without the need for points maintenance. Aftermarket options offer a cost-effective solution for these increasingly rare components.
Weak Spark Diagnosis & Repair
When an MS070 has weak or no spark, hard starts, or dies under load, the stator is often the culprit. The stator (magnet assembly) is the primary electrical generator in the ignition system, and replacement restores proper ignition timing and spark intensity.
Ignition System Overhaul
The CDI stator is often the key component in a complete ignition system upgrade, converting older points-based saws to modern electronic ignition. The module includes the stator, ignition coil, and high-voltage lead, providing a comprehensive replacement solution for professional and hobbyist restorers.
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm this stator fits my MS070?
A:Check your chainsaw model number on the housing. This stator fits STIHL 070, 090, MS070, MS090, and MS720 models. It replaces OEM part numbers 1106 400 0705 and 1106 404 3210.
Q: What's the difference between OEM and aftermarket stators?
A: Genuine STIHL stators for the 070/090 are extremely rare, as the saw was primarily produced with points ignition and only a small number had factory electronic ignition. Aftermarket stators provide a modern electronic ignition solution that works with the existing flywheel, offering reliable performance at a fraction of the cost of finding original parts.
Q: How do I install the CDI stator?
A: Installation typically involves disconnecting the old stator, removing the flywheel, orienting the new stator in the same position as the old one, and connecting the wires. The gap between the coil and flywheel should be set to approximately 0.3–0.4mm.
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