The Stihl MS661 C-M chainsaw with a 30″ bar and chain (which is the rollomatic ES light bar) is a professional chainsaw designed for the professional user. It is also the new competition saw for the Stihl Timbersports series.
The Stihl MS661 C-M has a 91.1 cc engine that produces 5.4 kW / 7.3 hp and weights only 7.4 kg without the bar and chain. The chainsaw features the environmentally friendly Stihl 2-MIX engine. The Stihl 2-stroke engine with 2-MIX provides plenty of torque and yet save around 20% on fuel compared to standard Stihl 2-stroke engines. It complies with all current EU emissions regulations.
The MS661 C-M also features Stihl M-Tronic which is a fully electronic engine management system that regulates the ignition timing and fuel metering in all conditions. It takes in to account the temperature, altitude and fuel quality and as a result provides consistency in engine performance. There is no manual adjustment of the carburettor needed. Thanks to the cold/warm start recognition, the combi-lever now only has one start position.
Other features include a decompression valve for easier starting, Stihl ElastoStart to help ensure jerk-free starting without load peaks, a long life air filter system and the Stihl HD2 filter.
On the 28 inch bar version of this model it comes with the light weight guide bar and a 3/8″ RS professional chain. The chain has low kickback, low vibration, low chatter and a smooth cutting behavior.
What else will I need to buy with my chainsaw?
- 2-Stroke Oil.
We advise STIHL MotoMix® which is Stihl’s patented premixed fuel, specially blended for ultimate performance. Like a sports drink for your engine, this 50:1 mixture is a combination of premium non-ethanol, high-octane motor fuel and our highest-quality STIHL HP Ultra oil. Clean and convenient, MotoMix® eliminates the hassle of mixing your own 2-stroke engine fuel while providing superior performance and lubrication. STIHL MotoMix® contains no ethanol, allowing it to maintain stability for up to two years after the seal is broken – so it stays fresh in your equipment during long storage periods. MotoMix® is also made of non-aromatic fuel and fully synthetic, highly biodegradable engine oil.
- Chain Oil
Chain lubricant promotes smooth operation by keeping the chain clean and free-running on the guide bar.
- Optional Extras
Chainsaw files, replacement bars and chains, chainsaw safety equipment (PPE) and log saw horses. All available in store at Masseys.
Stihl MS661 C-M Chainsaw Specification
Recommended bar length cm/inch 71 cm / 28″
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 values left/right m/s² 3) 5.5/5.5
STIHL Oilomatic saw chain pitch/type 3/8″ RS
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
Purchased from Masseys – If your chainsaw was purchased from Masseys and it develops a manufacturing fault during the warranty period, simply return the chainsaw to store and our mechanics will repair the machine free of charge. A warranty repair is when the machine has failed because of improper material or workmanship, under normal use and maintenance.
Purchased online – If you chainsaw was purchased from elsewhere, then we charge an initial £29.99 inspection charge to look at the machine. This will be refunded if the fault is a warranty issue and when the manufacturer has processed and accepted the warranty claim in full. Warranty for non-Masseys customers is 4-12 weeks as we have a duty to ensure our own customers are prioritised first.