In the world of high-performance chainsaws, few names command as much respect as STIHL. The STIHL MS 660 and the MS 500i are two legendary models known for their power, precision, and reliability. When it comes to demanding tasks like “room” sawing—cutting logs or large timber pieces in confined spaces, makeshift work zones, or indoor-like sheds—these two saws often take center stage. This article explores their strengths, their suitability for indoor or semi-enclosed cutting environments, and what makes them favorites for heavy-duty users.
What is “Room” Sawing?
“Room” sawing isn’t about cutting rooms per se. It refers to a situation where sawing work happens in tight or enclosed quarters such as sawmills, wood storage sheds, timber workshops, or makeshift cutting stations set up inside garages or barns. It’s different from forest cutting, where there’s open air and more space. In “room” sawing, space is limited, ventilation might be a concern, and precision is essential.
This is where the choice of tool becomes crucial—using a saw that is both powerful and controllable, and capable of delivering clean, efficient cuts even in tighter working conditions. That’s exactly where the STIHL MS 660 and 500i shine.
STIHL MS 660 – Raw Power and Proven Performance
The MS 660 is a workhorse. Designed for the toughest tasks, it features a powerful 91.6 cc engine that delivers around 7 horsepower. This saw was originally developed for forestry professionals who need raw cutting power to fell large trees and process thick logs.
Key Benefits:
- Proven Design: The MS 660 is known for its reliability. It’s been around for years and has built a reputation among loggers and sawmill workers alike.
- Great for Large Logs: In “room” sawing settings, especially when working with dense hardwoods or oversized timber, the MS 660 slices through with ease.
- Manual Carburetor Tuning: For those who like to fine-tune their machines, the MS 660 allows manual adjustment of fuel and air mix—a big plus in variable-temperature settings indoors or under cover.
In Tight Spaces:
Despite its power, the MS 660 does demand space. It’s on the heavier side and can be overkill if you’re dealing with smaller logs or softer woods. However, in workshop setups with proper supports or sawhorses, it’s unmatched for cutting efficiency and volume.
STIHL MS 500i – Modern Innovation with Fuel Injection
The STIHL MS 500i brings cutting-edge technology to traditional chainsawing. It’s the world’s first chainsaw with electronically controlled fuel injection. At 79.2 cc and around 6.7 horsepower, it nearly matches the MS 660 in power—but with a lighter weight and more responsive throttle.
Why It’s Perfect for “Room” Sawing:
- Lighter & Faster: At just over 6.2 kg (13.7 lbs), the 500i feels nimble in hand—especially important in confined setups where mobility matters.
- Quick Acceleration: Thanks to its fuel-injection system, the MS 500i accelerates almost instantly, allowing for precise cuts in tight spaces without bogging down.
- Adaptive Performance: Indoors or in variable environments where temperature and airflow may fluctuate, the 500i adjusts fuel delivery automatically—no manual tuning needed.
Additional Perks:
- Less Fatigue: For extended cutting sessions indoors or under a roof, the reduced weight and vibration control help minimize fatigue.
- Consistent Cuts: Even if you’re switching wood types (pine to oak, for example), the electronic injection system keeps the performance smooth and predictable.
Comparing the Two in a “Room” Setting
| Feature | STIHL MS 660 | STIHL MS 500i |
|---|---|---|
| Engine Type | Carburetor | Electronic Fuel Injection |
| Power Output | ~7.0 hp | ~6.7 hp |
| Weight (dry) | ~7.3 kg (16.1 lbs) | ~6.2 kg (13.7 lbs) |
| Best For | Rugged, large log cutting | Fast, responsive cuts in tight spaces |
| Start Type | Manual pull-start | Easy start with injection |
| Maintenance | Traditional tuning required | Auto-adjusting, less maintenance |
When working in tight indoor environments like log sheds or carpentry workshops, the STIHL MS 500i has a clear edge in comfort and adaptability. However, for massive cuts or prolonged use where torque is critical, the MS 660 still delivers classic muscle that many professionals trust.
Ventilation and Safety Concerns
One of the key issues with “room” sawing is airflow. Chainsaws emit fumes, and in enclosed or semi-enclosed areas, this can be hazardous. While both the MS 660 and 500i are gas-powered and emit exhaust, the 500i tends to burn fuel more efficiently, producing less smoke and a cleaner operation overall.
No matter which model you use, it’s vital to have:
- Proper ventilation (windows, fans, or open walls)
- Carbon monoxide detectors in indoor shops
- Safety gear like hearing protection, goggles, and gloves
- Regular maintenance to prevent overheating or backfire
Real-World Experiences
Many professional woodworkers and firewood sellers who do “room” sawing tasks indoors have found the 500i to be a game-changer. Its ability to start quickly in cold sheds or dusty garages saves time and reduces frustration. Meanwhile, veteran users of the MS 660 often praise its solid build and ability to chew through anything—even logs with embedded knots or resin buildup.
One timber mill worker shared, “We use the MS 660 for our biggest logs, but for everyday cuts in the shed, the 500i is a joy to use. Lighter, faster, and starts like a dream even on cold mornings.”
Conclusion: Which One Should You Choose?
If you’re focused on “room” sawing tasks—working in a shop, under a roof, or in semi-enclosed cutting zones—the STIHL MS 500i is likely the better choice. It’s agile, tech-smart, and easier to handle in tight spaces. For those who are more traditional or need maximum torque and durability, especially for oversized logs, the MS 660 is a powerful ally.
But the truth is, you can’t go wrong with either. Both are top-tier saws built for serious users. The decision ultimately comes down to your specific needs, space, and the volume of work.
So whether you’re slicing beams in a dusty workshop or breaking down logs for furniture inside your garage, the STIHL MS 660 and 500i prove that elite chainsaws aren’t just for the forest—they belong in the “room,” to
