MS 661 C-M
Extremely powerful 5.4kW professional saw with STIHL M-Tronic (M)
General
Big timber saw for the toughest jobs in forestry. The M-Tronic guarantees optimum engine performance at all times, while its single start position and stop button function mean easy starting. Controlled-delivery high-performance oil pump for conveying high quantities of oil; HD2 filter with very good filter effect, economical 2-MIX engine.
Versions
Price-
MS 661 C-M,Bar length 20"/50cm€1,714.00*
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MS 661 C-M,Bar length 25"/63cm€1,714.00*
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MS 661 C-M,Bar length 30"/75cm€1,714.00*
* Manufacturer's recommended retail price updated as of 2021. The manufacturer's recommended retail prices are subject to change without notice.
The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.
Technical data

Technical data
Technical data | Value |
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Displacement cm³ | 91,1 |
Power output kW/bhp | 5,4/7,3 |
Weight kg 1) | 7,4 |
Power-to-weight ratio kg/kW | 1,4 |
Sound pressure level dB(A) 2) | 105 |
Sound power level dB(A) 2) | 118 |
Vibration level left/right m/s² 3) | 6,9/5,6 |
STIHL Oilomatic saw chain type | 3/8" RS |
Recommended bar length cm/inch | 71 or 75cm/28 or 30" |
1) Without fuel, without bar and chain
2) K-factor according to DIR 2006/42/EC = 2.5 dB (A)
3) K-factor according to DIR 2006/42/EC = 2m / s ²
The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.
Features

Standard features
The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.
Accessories

Accessories
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2-in-1 file holder
Practical tool for quickly sharpening the teeth and depth gauge in a single step. Ideal for occasional users. For 1/4" P, 3/8" P, .325", 3/8" and .404" saw chains, integrated file tolerance compensation (only from STIHL).
Versions
Price- 2-in-1 file holder, 3/8" ø 5.2 mm €53.00*
* Manufacturer's recommended retail price updated as of 2021. The manufacturer's recommended retail prices are subject to change without notice.
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HP Super two-stroke engine oil
Semi-synthetic oil with low-ash additives for clean low-smoke burning. 'Low-smoke oil' performance class: JASO-FD, ISO-L-EGD. Fuel/oil ratio: 50:1. Particularly recommended for STIHL 4-MIX engines.
Versions
Price- HP Super two-stroke oil, 1 l metering bottle €20.00*
* Manufacturer's recommended retail price updated as of 2021. The manufacturer's recommended retail prices are subject to change without notice.
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ADVANCE GTX trekking chainsaw boots
Special profile sole with very good grip. High quality, water-repellent suede. With breathable and waterproof GORE-TEX® membrane. Additional water and wear protection provided by high-rise rubber edge. Highly absorbent, removable inner sole. Suitable for demanding, professional chainsaw users on hillsides and for tree maintenance. EN ISO 17249, cut resistance Class 2 (= 24 m/s).
Technical data Value Leg height 20 cm Weight 1) 2,5 kg Cut protection class Class 2 Size 39 - 47 1) Approx per pair, using size 42
Versions
Price- ADVANCE GTX trekking chainsaw boots, size 43 / 9 €363.00*
* Manufacturer's recommended retail price updated as of 2021. The manufacturer's recommended retail prices are subject to change without notice.
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The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.