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Description
3689 005 0081 Stihl 26RM3 Rapid Micro .325" Chainsaw Chain — 81 Drive Links Semi-Chisel Low Kickback Genuine OEM Part
The Stihl 26RM3 Rapid Micro Chainsaw Chain (81 Drive Links) is a genuine OEM replacement chain designed for STIHL chainsaws equipped with a 20-inch guide bar using a .325" pitch and .063" gauge. As the low-kickback version of STIHL Rapid™ Micro™, this RM3 chain delivers the same smooth cutting performance as standard RM chains while reducing the risk of kickback injury.
Featuring a taller-profile design with added mass, this chain is well-suited for larger displacement engines. The semi-chisel cutter design offers excellent durability and edge retention, staying sharp longer during normal cutting conditions and making maintenance easier.
This is the exact OEM chain specified by STIHL for saws running a 20" .325 .063 bar with 81 drive links, ensuring proper fitment, safe operation, and consistent performance.
Product Details
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Item Number: 3689 005 0081
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Brand Compatibility: Stihl (OEM)
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Chain Model: 26RM3 (Rapid Micro 3)
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Part Type: Chainsaw Chain Loop
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Bar Length: 20 Inch
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Pitch: .325"
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Gauge: .063" (1.6 mm)
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Drive Link Count: 81 Drive Links
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Cutter Type: Semi-Chisel
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Cutter Sequence: Standard
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Kickback Reduction: Single-Humped Drive Links
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Sharpening File Size: 3/16"
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Condition: New Genuine OEM Replacement Part
Function
This chain is designed to:
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Deliver smooth, controlled cutting performance
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Reduce kickback compared to standard chains
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Maintain sharpness longer in dirty or mixed wood
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Perform reliably on higher-displacement chainsaws
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Replace worn or damaged OEM chain loops
⚠️ Semi-chisel chains trade a small amount of cutting speed for durability, control, and easier maintenance.
Verify Fitment in 30 Seconds
Before ordering, confirm the following on your guide bar or current chain:
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Bar Length: 20"
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Pitch: .325"
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Gauge: .063"
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Drive Links: 81
⚠️ Model alone does not guarantee fitment — bar specifications must match.
These details are typically stamped on the guide bar or listed in the owner’s manual.
⚠️ .063 gauge chains will NOT fit .050 or .058 gauge bars.
Compatibility
Fits STIHL chainsaws using a 20” bar with .325 pitch, .063 gauge, and 81 drive links, including:
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Stihl MS 260
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Stihl MS 261 / MS 261 C-M
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Stihl MS 270
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Stihl MS 271
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Stihl MS 280
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Stihl MS 290 / MS 291
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Stihl MS 310 / MS 311
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Stihl MS 340 / MS 341
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Stihl MS 360 / MS 361 / MS 362
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Stihl MS 380 / MS 390 / MS 391
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Stihl MS 440 / MS 441
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Stihl MS 460 / MS 461
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Stihl MS 640 / MS 650
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Stihl MS 660 / MS 661
⚠️ Also fits other STIHL models that accept the same bar and chain specifications.
Installation / Usage
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Remove the old chain from the guide bar
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Install the new Stihl 26RM3 chain loop onto the sprocket and bar
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Adjust chain tension properly (snug but movable by hand)
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Lubricate with proper bar and chain oil
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Test saw operation before cutting use
Maintenance Tips
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Sharpen regularly using a 3/16" file
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Maintain proper depth gauge settings
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Keep chain tension properly adjusted
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Clean cutters and drive links frequently
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Lubricate with quality bar and chain oil
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Replace chain if damaged or excessively worn
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Store in dry, lightly oiled conditions to prevent corrosion


