Description
STIHL OEM 3003 005 9902 – 20" Light 04 Bar & Chain Kit – 2 Chains + 1 Guide Bar
Keep your STIHL chainsaw cutting smoothly and efficiently with the STIHL OEM 3003 005 9902 Bar and Chain Kit. This genuine STIHL replacement kit includes one 20-inch Light 04 guide bar and two STIHL 26 RM3 RAPID Micro 3 chainsaw chains, providing a complete replacement cutting attachment and an extra chain for future use.
Each chain features .325" pitch, .063" (1.6 mm) gauge, and 81 drive links. The STIHL RAPID Micro 3 chain uses a semi-chisel cutter design that provides smooth cutting performance, dependable edge retention, and reduced-kickback characteristics.
The included STIHL Light 04 guide bar combines lightweight construction with induction-hardened rails and a narrow sprocket nose designed to help reduce kickback. This combination is ideal for firewood cutting, tree maintenance, limbing, and general property maintenance.
With two chains included, you can keep one installed and have a spare ready when sharpening or replacement is needed.
What's Included in the Kit?
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Quantity 1 – STIHL Light 04 Guide Bar
- Part Number: 3003 008 6821
- Length: 20"
- Pitch: .325"
- Gauge: .063" (1.6 mm)
- Designed for 81-drive-link chain
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Quantity 2 – STIHL 26 RM3 RAPID Micro 3 Chains
- Part Number: 3689 005 0081
- Length: 20"
- Pitch: .325"
- Gauge: .063" (1.6 mm)
- Drive Links: 81 per chain
- Cutter Type: Semi-Chisel
Product Features
- Genuine STIHL OEM bar and chain kit
- Includes one 20" guide bar and two chainsaw chains
- STIHL Light 04 lightweight guide bar
- STIHL 26 RM3 RAPID Micro 3 semi-chisel chains
- .325" chain pitch
- .063" (1.6 mm) chain gauge
- 81 drive links per chain
- Reduced-kickback chain design
- Smooth, dependable cutting performance
- Semi-chisel cutters provide good edge retention
- Lightweight, durable guide bar construction
- Narrow guide bar nose helps reduce kickback
- Four-rivet sprocket nose
- Induction-hardened guide bar rails resist wear
- Laser-engraved guide bar specifications
- Suitable for firewood cutting, limbing, and general woodcutting
- Includes a spare chain for convenient replacement
Fits These STIHL Chainsaw Models
026, 029, MS260, MS261, MS270, MS271, MS280, MS290, MS291
Important: These models may use different cutting attachments depending on their configuration. Verify that your chainsaw uses the correct bar mounting pattern, .325" pitch, .063" gauge, and 81 drive links before ordering.
STIHL Light 04 Guide Bar Features
The STIHL Light 04 Guide Bar combines an updated modern design with the dependable STIHL quality expected by frequent chainsaw users.
- Lightweight Construction: Three electrically welded metal plates provide strength and stability without unnecessary weight.
- Narrow Bar Nose: Helps reduce kickback and provides good maneuverability.
- Four-Rivet Sprocket Nose: Allows the chain to travel smoothly around the bar tip while reducing wear.
- Induction-Hardened Rails: Improve wear resistance and help extend guide bar service life.
- Laser-Engraved Specifications: Displays guide bar length, pitch, gauge, drive-link count, and part number.
- Versatile Design: Ideal for frequent chainsaw use, firewood cutting, and limbing.
STIHL 26 RM3 RAPID Micro 3 Chain Features
The STIHL 26 RM3 RAPID Micro 3 chain uses semi-chisel cutters designed for dependable cutting performance and durability.
Compared with full-chisel chains, the semi-chisel cutter design is generally more forgiving when cutting wood containing minor dirt or abrasive material and can maintain its cutting edge longer under less-than-ideal conditions.
- Semi-chisel cutter design
- Smooth cutting characteristics
- Reduced-kickback features
- Good cutting-edge durability
- Suitable for hardwood and softwood
- Excellent for firewood cutting and general maintenance
- STIHL OILOMATIC® lubrication system
- Recommended sharpening file: 4.8 mm (3/16")
Product Specifications
- Brand: STIHL
- OEM Kit Part Number: 3003 005 9902
- Product Type: Bar and Chain Replacement Kit
- Guide Bar: STIHL Light 04
- Guide Bar Part Number: 3003 008 6821
- Guide Bar Length: 20" (50 cm)
- Chain Type: 26 RM3 RAPID Micro 3
- Chain Part Number: 3689 005 0081
- Chain Pitch: .325"
- Chain Gauge: .063" (1.6 mm)
- Drive Links: 81 Per Chain
- Cutter Style: Semi-Chisel
- Guide Bars Included: 1
- Chains Included: 2
- Total Kit Contents: 3 Pieces
Why Replace the Guide Bar and Chain Together?
Over time, guide bar rails and chainsaw chains wear during normal cutting operations. A worn guide bar can affect chain tracking, increase vibration, and contribute to uneven cutting.
Replacing the guide bar and chain together helps restore proper chain guidance and dependable cutting performance.
With two chains included, you can keep one installed and have another ready when sharpening or replacement is needed, helping reduce downtime during cutting projects.
Related Parts & Recommended Maintenance Items
- 3689 005 0081 – STIHL 26 RM3 Replacement Chain: 20", .325" pitch, .063" gauge, 81 drive links
- 3003 008 6821 – STIHL Light 04 Guide Bar: 20" replacement guide bar
- STIHL Bar and Chain Oil: Essential for proper cutting attachment lubrication
- STIHL 4.8 mm (3/16") Round File: Recommended for sharpening 26 RM3 chain
- STIHL File Holder and Sharpening Guide: Helps maintain correct cutter angles
- STIHL Depth Gauge Tool: Helps maintain proper chain depth gauge settings
- Replacement .325" Drive Sprocket: Inspect for wear and verify the correct part for your chainsaw
- Guide Bar Groove Cleaner: Removes debris and packed sawdust
- Replacement Air Filter: Recommended during routine chainsaw service
- Replacement Spark Plug: Check maintenance requirements for your chainsaw model
Installation & Maintenance Tips
- Turn off the chainsaw, allow the engine to cool, and disconnect the spark plug before servicing.
- Remove the sprocket cover, old chain, and guide bar.
- Clean the guide bar mounting area, oil passages, and surrounding debris.
- Inspect the drive sprocket for wear before installing the new chain.
- Confirm that the chainsaw manufacturer approves the 20" cutting attachment for your model.
- Install the new STIHL Light 04 guide bar and position the chain tensioning mechanism correctly.
- Install the chain with the cutting teeth facing forward along the top of the guide bar.
- Make sure all 81 drive links are properly seated in the guide bar groove and drive sprocket.
- Verify that the drive sprocket and guide bar nose match the .325" chain pitch.
- Adjust chain tension according to the chainsaw operator's manual.
- Tighten guide bar mounting hardware according to STIHL specifications for your model.
- Check that the chain moves freely around the guide bar before starting the saw.
- Confirm adequate bar and chain oil delivery before cutting.
- Recheck chain tension after initial operation and periodically during use.
- Use a 4.8 mm (3/16") round file when sharpening STIHL 26 RM3 chain.
- Maintain proper cutter angles and depth gauge settings according to STIHL sharpening instructions.
- Inspect the guide bar rails and sprocket nose regularly for wear or damage.
- Flip the guide bar periodically, as recommended by STIHL, to promote even rail wear.
- Keep the second chain clean, sharp, and properly stored for future use.
Before You Order – Verify Compatibility
OEM Kit Number: 3003 005 9902
Guide Bar: 20" STIHL Light 04
Guide Bar Part Number: 3003 008 6821
Chain Type: STIHL 26 RM3 RAPID Micro 3
Chain Part Number: 3689 005 0081
Chain Pitch: .325"
Chain Gauge: .063"
Drive Links: 81 Per Chain
Kit Contents: 1 Guide Bar + 2 Chains
Important: Do not order based on bar length or chainsaw model alone. Verify your current guide bar mounting configuration, chain pitch, gauge, and drive-link count.
This kit is not interchangeable with 3/8" low-profile, standard 3/8", or .050" gauge chain configurations.
Some compatible chainsaw models may require different cutting attachments depending on their configuration.
Not Sure If This Is the Right Kit?
Contact us with your STIHL chainsaw model and serial number. We'll help verify the correct bar and chain kit before you order.