Products Description
MS290/MS310/MS390 Chainsaw Buffer Set
AV Annular Buffer Mount Set – Anti-Vibration Rubber Mounts for STIHL MS290, MS310 & MS390
This annular buffer set is a comprehensive replacement kit for the anti-vibration (AV) system on STIHL MS290, MS310, and MS390 chainsaws, as well as their predecessor models 029 and 039 . Rubber AV buffers are installed between the engine housing, handle housing, and front handle to isolate the operator from engine vibration and reduce fatigue during extended use . Damaged rubber buffers must always be replaced in sets to maintain balanced vibration damping . This kit provides all the necessary AV mounts to restore the saw's original vibration isolation performance when the original rubber buffers have hardened, cracked, or lost their elasticity.
Technical Profiles & Materials
Complete Anti-Vibration Mount Set – Includes annular buffers and buffer caps that mount between the front handle, handle housing, and engine housing . A typical set contains 3 annular buffers and 3 buffer caps . Replacing worn or damaged rubber AV mounts with this comprehensive set restores the saw's original vibration isolation performance.
OEM-Spec Replacement – Replaces STIHL OEM part numbers 1123 790 9900 and 1123 791 2805 . Fits STIHL 029, 039, MS290, MS310, and MS390 chainsaws . Quality aftermarket replacements from ISO-certified manufacturers offer a cost-effective alternative to genuine parts .
Durable Oil-Resistant Material – Manufactured from cross-linked polyethylene or oil-resistant rubber compounds that withstand exposure to bar oil, fuel, and outdoor working conditions . The material resists degradation from petroleum products and maintains its damping properties over time.
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | OEM Part No. | 1123 790 9900 / 1123 791 2805 |
| 2 | Compatibility | STIHL 029, 039, MS290, MS310, MS390 |
| 3 | Also Fits | MS210, MS230, MS250, 021, 023, 025 |
| 4 | Material | Cross-linked Polyethylene / Oil-resistant rubber |
| 5 | Mount Type | Annular buffer / Anti-vibration mount |
| 6 | Buffer B Inner Diameter | 7mm at one end, 8mm at the opposite end |
| 7 | Kit Contents | 3 × Ring Pads, 3 × Pad Seals (varies by kit) |
| 8 | Weight (Typical) | Approx. 100g |
Products Application
AV System Restoration
Replaces hardened, cracked, or deteriorated rubber buffers that have lost their vibration-damping properties. Restores the saw's original vibration isolation, reducing operator fatigue during extended cutting sessions . Damaged annular buffers should always be replaced in complete sets to ensure balanced vibration damping .
Handle Housing & Engine Housing Reassembly
When replacing the front handle or separating the handle housing from the engine housing, the annular buffers must be replaced to maintain proper fit and vibration isolation . These mounts are essential for reassembly after major repairs or engine work.
Preventative Maintenance Kit
When performing routine chainsaw service, inspecting and replacing the AV buffers is recommended as part of a comprehensive maintenance program. Quality aftermarket sets from brands like Jono & Johno and DLA Engine Parts provide reliable performance at competitive prices .
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 buffer set fits my chainsaw?
A:Check your chainsaw model number on the housing. This set fits STIHL 029, 039, MS290, MS310, and MS390 models, replacing OEM part numbers 1123 790 9900 and 1123 791 2805 . While the small buffers also fit other models, ensure you order a set specifically designed for your model .
Q: What are the symptoms of worn AV buffers?
A: Common symptoms include excessive vibration felt through the handle, rattling or loose feeling in the handle assembly, visible cracks or hardening of the rubber mounts, and increased operator fatigue during use. Damaged rubber buffers must always be replaced in sets to maintain balanced vibration damping .
Q: What is included in a typical buffer set?
A: A standard set includes 3 annular buffers and 3 buffer caps . Some sets may include additional components such as shim washers. Check the specific kit contents before ordering.
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