Description
Overview:
This genuine Stihl cylinder base gasket (MPN 1122 029 2301) is a 0.5 mm sealing gasket for the joint between the cylinder and crankcase on Stihl two‐stroke chainsaws, including the MS660 and 066. Made from durable, heat‐ and fuel‐resistant gasket material, it restores and maintains an airtight seal to prevent air and oil leaks and to preserve correct compression. A precise 0.5 mm thickness supports accurate assembly height, helping the engine start reliably and produce consistent power under load. Designed for the demands of forestry, arborist and construction site use, it is suitable for routine top‐end refreshes and for replacing a damaged or leaking gasket. As a genuine Stihl part, it matches the original specification for fit and performance, helping your saw run smoothly and efficiently.
Key Features:
- Genuine Stihl part for assured compatibility and specification
- 0.5 mm thickness for consistent sealing and compression
- Durable, heat‐ and fuel‐resistant construction for long service life
- Maintains an airtight seal between cylinder and crankcase to prevent leaks
- Supports reliable starting, stable idling and strong cutting performance
- Direct replacement; no modifications required when used with clean, true mating surfaces
- Suitable for professional and domestic saws used in demanding conditions
- Easy to fit with basic hand tools during top‐end service work
- Helps protect engine components by reducing the risk of lean running from air leaks
- OEM reference: 1122 029 2301 for accurate identification
Typical Applications:
Used during piston and cylinder replacement, top‐end rebuilds, decarbonising, or when diagnosing and fixing air leaks and compression loss. Ideal for restoring performance after heavy use in forestry, arboriculture, construction site work, landscaping and firewood processing, where reliable sealing is essential for engine efficiency and longevity.
Also known as:
Cylinder base gasket, barrel gasket, engine base seal, crankcase‐to‐cylinder gasket, cylinder sealing shim (0.5 mm), chainsaw cylinder seal.
Fits Models:
066, MS 650, MS 660, MS650, MS660
Alternate Part Numbers:
1122-029-2301, 11220292301
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