STIHL Fan Housing for MS 200, MS 200 T, 020 and 020 T Chainsaws - 1129 080 1806

The STIHL Fan Housing (part number 1129 080 1806) is a genuine OEM moulded plastic cooling shroud for the STIHL MS 200, MS 200 T, 020 and 020 T chainsaws. The fan housing surrounds the flywheel and directs cooling air across the cylinder and associated engine components during operation, maintaining correct engine temperature and helping prevent overheating under sustained cutting loads. It also provides mechanical protection around the flywheel and ignition area, shielding components from sawdust, wood chips and accidental contact. A direct replacement for cracked, warped, impact-damaged or missing housings, it aligns with the original factory mounting points for a precise, rattle-free fit. Available from Gustharts, an authorised STIHL dealer with UK stock ready to ship.

This is the fan housing shell only — part 1129 080 1806. It does not include the rewind starter assembly. If you require the complete fan housing with rewind starter, the correct part is 1129 080 2105. Always confirm which component you need before ordering. Check your machine's model and serial number against the compatibility list and contact Gustharts if you need confirmation before purchasing.

Key Features

• Genuine STIHL OEM fan housing — manufactured to original specification for correct fit, airflow geometry and mounting alignment
• Part number 1129 080 1806 — also referenced as 1129-080-1806 and 11290801806 across STIHL documentation and ordering systems
• Housing shell only — does not include the rewind starter assembly; for the complete unit see part 1129 080 2105
• Directs cooling airflow across the cylinder — maintains correct engine operating temperature under sustained full-load cutting
• Protects flywheel and ignition area — shields components from sawdust, chips and accidental contact during cutting work
• Durable impact-resistant moulded plastic — built to withstand vibration, oil and fuel exposure, and outdoor working conditions
• Correct hole spacing and moulded guides — aligns with original factory mounting points for accurate, stable fitment
• Fits MS 200, MS 200 T, 020 and 020 T — covers both top-handle arborist and rear-handle variants in this STIHL platform

Technical Specification

Fits Models

• STIHL MS 200
• STIHL MS 200 T
• STIHL 020
• STIHL 020 T

Why the Fan Housing Matters - and Why Fit Genuine STIHL?

The fan housing does more than cosmetic work. On a small-displacement two-stroke engine like the MS 200 range — running at high RPM under sustained arborist and grounds maintenance loads — the cooling airflow path is fundamental to engine temperature management. A cracked, warped or missing housing breaks the designed airflow circuit, allowing hot air to recirculate around the cylinder rather than being expelled, increasing the risk of overheating and accelerating piston and cylinder wear. In a top-handle arborist saw like the MS 200 T, where the tool is regularly used in varied orientations at height, consistent cooling across all cutting positions is particularly important.

Aftermarket fan housings for the MS 200 platform are widely available, but the internal geometry of the housing — the rib profiles, vent apertures and sealing surfaces that direct airflow — are closely matched to the flywheel fan blade profile and cylinder fin arrangement. Dimensional variation in an aftermarket moulding can reduce cooling efficiency without producing any immediate visible symptom, only manifesting as premature wear over sustained use. STIHL manufactures genuine OEM housings to match the original airflow specification, ensuring the designed cooling performance is maintained for the service life of the part.

Also Known As

The STIHL fan housing is also referred to as a cooling shroud, blower shroud, air shroud, flywheel cover, fan cover, engine side cover and cooling cover. In some workshop contexts it is also called a starter housing or recoil cover — note that these terms sometimes refer to the complete fan housing and rewind starter assembly (part 1129 080 2105) rather than the housing shell alone (this part, 1129 080 1806). For correct identification when ordering, always use STIHL part number 1129 080 1806 and confirm whether you require the housing only or the complete starter assembly.

Often Replaced Alongside

When replacing the fan housing, inspect the following components at the same time — these are located in the same area and are commonly worn or damaged alongside a failed housing:

• Rewind spring (1129 190 0601) — inspect for fatigue or breakage when the fan housing is removed; standard rewind starter service item for the MS 200 range
• Fan housing with rewind starter complete assembly (1129 080 2105) — if the rewind starter mechanism is also damaged, the complete unit may be the more practical replacement
• Spark plug (NGK BPMR7A) — replace at standard service intervals or whenever ignition components are disturbed

Explore More

• STIHL Spare Parts
• STIHL Parts Finder
• STIHL Machinery
• Sharpening & Maintenance Tools

FAQs

Is this the complete fan housing and rewind starter assembly?

No. Part 1129 080 1806 is the fan housing shell only. If you require the complete fan housing with rewind starter included, the correct part is 1129 080 2105.

What is the part number for this STIHL fan housing?

The manufacturer part number is 1129 080 1806, also formatted as 1129-080-1806 and 11290801806.

Which STIHL models does this fan housing fit?

This fan housing fits the STIHL MS 200, MS 200 T, 020 and 020 T chainsaws. The 020 and 020 T are the predecessor models to the MS 200 and MS 200 T — same platform, renamed when STIHL transitioned to the MS series designation.

What does the fan housing do on a chainsaw?

The fan housing channels cooling air from the flywheel fan across the cylinder fins during engine operation. It maintains the designed airflow circuit that controls engine temperature under load, and physically shields the flywheel and ignition components from sawdust, chips and accidental contact.

When should the fan housing be replaced?

Replace if the housing is cracked, warped, impact-damaged or missing. A damaged housing disrupts the cooling airflow path and can lead to engine overheating under sustained load. Inspect during any service where the ignition or starter area is accessed.

Should I confirm my model before ordering?

Yes. Always check your machine's model number and serial number before ordering spare parts. Contact Gustharts if you need help confirming compatibility with your specific machine.

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