Description
Overview:
This Spark Plug Boot is a genuine Stihl component designed to protect and insulate the spark plug connection on petrol-powered tools. Made from durable, heat-resistant black rubber, it shields the plug from moisture, dust and vibration while ensuring a secure electrical path from the ignition lead to the plug. It helps maintain reliable starting and smooth running by preventing arcing and misfires. Purpose-made for Stihl machinery, it suits a wide range of models including the BT120C earth auger and FT250 trimmer, and is built to OEM specification for a proper fit and long service life. Supplied under Stihl OEM Part No. 4128 405 1000, it is an easy, quick replacement for worn or cracked boots that restores dependable ignition performance.
Key Features:
- Genuine Stihl part for assured compatibility and build quality
- Tough, heat-resistant rubber for long service life in demanding use
- Maintains a firm, insulated connection to reduce arcing and misfires
- Protects the spark plug from water, dirt, fuel splash and abrasion
- Angled boot design for tidy routing and strain relief on the HT lead
- Helps improve starting reliability and consistent engine performance
- Simple push-on fit; no special tools required
- Manufactured to OEM specification (4128 405 1000) for correct seating
- Suitable for a wide range of Stihl brushcutters, clearing saws, augers and pole pruners
- A practical preventative replacement when the original boot shows cracking or hardening
Typical Applications:
Used on Stihl earth augers, brushcutters, clearing saws and pole pruners to protect the spark plug connection and maintain consistent ignition. Ideal for routine maintenance, engine refurbishment, or resolving intermittent starting and running issues caused by damaged or perished spark plug caps in outdoor, landscaping and forestry work.
Also known as:
Spark plug cap, ignition cap, HT lead cap, plug connector, plug cover, ignition boot, suppressor cap. These terms refer to the insulated connector that fits over the spark plug terminal and joins to the high-tension lead to carry the ignition voltage safely.
Fits Models:
BT 120 C, BT 121, BT 121 Z, BT120C, BT121, BT121Z, FR350, FR450, FR480, FR480C, FS120, FS120R, FS200, FS200R, FS250, FS250R, FS300, FS350, FS380, FS400, FS450, FS480, FT250, HT250, KA120, KA120R, KA250 Attachment, KA250Attachment, SP200, SP400, SP450, SP451, SP481
Alternate Part Numbers:
4128-405-1000, 41284051000
Product Specifications
| L&S Part No. | 4128 405 1000 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Stihl |
| OEM No. | 41284051000 |
| Unit of Sale | 1 |
| Applications | BT 120 C, BT 121, BT 121 Z, BT120C, BT121, BT121Z, FR350, FR450, FR480, FR480C, FS120, FS120R, FS200, FS200R, FS250, FS250R, FS300, FS350, FS380, FS400, FS450, FS480, FT250, HT250, KA120, KA120R, KA250 Attachment, KA250Attachment, SP200, SP400, SP450, SP451, SP481 |
| Machine Type | Augers, Brushcutters, Pole Pruners |
| Fits Models | FS120, FS200, FS250 | FS300, FS350, FS380 | FS400, FS450, FS480 | FR350, FR450, FR480, FR480C | KA120, KA120R, KA250 Attachment | BT 120 C | BT 121 | BT 121 Z | SP 481 |
