When it comes to professional-grade chainsaws, Stihl consistently ranks among the top manufacturers in the world. Whether you’re a seasoned logger, an arborist, or a landowner handling heavy-duty cutting tasks, the Stihl MS 661 C-M and Stihl 462 C-M are two standout choices. Pair either one with an Oregon EXL chain, a 20-inch guide bar, and a 7-pin rim sprocket, and you have a cutting setup that balances raw power, efficiency, and performance in one well-rounded package.
In this article, we’ll dive into the key features, performance differences, and practical applications of both chainsaws—and examine how the Oregon EXL chain and 7-pin rim enhance cutting performance.
Stihl MS 661 C-M: Built for Maximum Power
The MS 661 C-M is Stihl’s powerhouse for large timber and demanding felling jobs. Designed for professional forestry work, this saw is engineered to handle high stress and long run times in rugged conditions.
Key Specifications:
- Engine power: 7.2 hp (5.4 kW)
- Displacement: 91.1 cc
- Weight (without bar/chain): 16.5 lbs (7.5 kg)
- Bar length range: 20″–36″
- M-Tronic engine management: Yes
- Decompression valve & ElastoStart handle: Included
This saw excels in high-volume cutting operations and is best suited for felling large-diameter hardwood trees. The M-Tronic system automatically adjusts fuel mixture, optimizing performance in varying altitudes and temperatures. This makes the 661 both smart and reliable in diverse conditions.
Stihl MS 462 C-M: The Lightweight Powerhouse
While the MS 661 is all about brute force, the MS 462 C-M takes a more agile approach to cutting. It offers a powerful performance in a lightweight, maneuverable design—ideal for long hours of limbing, bucking, and felling medium to large trees.
Key Specifications:
- Engine power: 6.0 hp (4.4 kW)
- Displacement: 72.2 cc
- Weight (without bar/chain): 13.2 lbs (6.0 kg)
- Bar length range: 16″–28″
- M-Tronic engine management: Yes
- Highly responsive throttle and fast acceleration
Weighing over 3 lbs less than the MS 661, the 462 C-M significantly reduces user fatigue. It still provides enough torque and RPM to handle hardwoods, especially when combined with a high-performance chain and rim sprocket.
Oregon EXL Chain: Fast, Smooth, and Efficient Cutting
The Oregon EXL chain is a professional-grade, full chisel chain optimized for high-speed cutting and durability. When matched with a 20-inch bar, it becomes a versatile option for both chainsaws.
Key Features of the Oregon EXL Chain:
- Full chisel cutters for aggressive, fast cuts
- LubriTec™ oiling system for longer life
- Low vibration design
- File-friendly for easier sharpening
The EXL chain’s square-corner chisel cutters slice through wood cleanly and efficiently, making it ideal for hardwood and softwood alike. While full chisel chains can dull quicker than semi-chisel types, the EXL’s edge retention is impressive, especially when properly maintained and used with quality bar oil.
On both the MS 661 and 462, this chain enhances performance by maximizing the saw’s horsepower output, translating energy into cleaner, faster cuts.
20-Inch Bar: Balanced and Versatile
Both saws can accommodate longer guide bars, but the 20-inch bar offers a sweet spot of balance, control, and versatility. It’s large enough to handle serious timber while staying nimble for limbing and bucking.
Why 20 Inches Works Well:
- Improved handling and control vs. longer bars
- Reduces engine strain
- Efficient for felling trees up to 36″ in diameter (with proper technique)
- Lighter weight = less user fatigue
Pairing a 20″ bar with the Oregon EXL chain creates a nimble yet capable setup, especially effective on the 462 C-M, where the weight savings multiply overall efficiency.
7-Pin Rim Sprocket: Speed and Performance
The 7-pin rim sprocket is another key piece of the performance puzzle. Most saws come standard with a 7-tooth sprocket, but some models offer 8-tooth options for higher chain speed. Sticking with a 7-pin offers a great balance between torque and chain speed.
Benefits of a 7-Pin Rim Sprocket:
- Maintains chain speed without overloading engine
- Ideal for general-purpose cutting
- Works well with full chisel chains like the EXL
- Smoother chain engagement
For the MS 661, a 7-pin sprocket helps tame the massive power output, keeping the chain speed manageable and safer for big cuts. On the MS 462, it complements the fast-revving nature of the engine, offering consistent, high-speed cutting without compromising torque.
Practical Applications and Recommendations
MS 661 C-M Setup (20″ Bar, Oregon EXL, 7-Pin Rim):
- Best for large tree felling, storm cleanup, and milling
- Handles big hardwoods like oak, hickory, and maple
- Great for experienced professionals needing maximum power
MS 462 C-M Setup (20″ Bar, Oregon EXL, 7-Pin Rim):
- Excellent for mid-size to large trees, especially in forestry and firewood processing
- Great choice for arborists or landowners seeking a lighter saw with pro-level performance
- More maneuverable for limbing and climbing tasks
If you only want one saw to do it all, the 462 C-M with this setup offers an excellent balance. If your work involves constant large-tree felling, the 661 C-M is worth the extra weight and cost.
Final Thoughts
Both the Stihl MS 661 C-M and the Stihl 462 C-M are exceptional chainsaws designed to meet different cutting needs. Outfitting them with a 20-inch bar, Oregon EXL chain, and a 7-pin rim sprocket ensures top-tier performance, reduced user fatigue, and dependable results in the field.
The 661 is a powerhouse for the toughest jobs, while the 462 offers a more refined and agile cutting experience. Whichever saw you choose, pairing it with the right accessories—like the EXL chain and the proper sprocket—will unlock its full potential.
