Stihl MS 650 MS 660 Instruction Manual

Pages 124

Year 2011

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Stihl MS 650 MS 660 Specification

The Stihl MS 650 and MS 660 chainsaws are designed for professional forestry and heavy-duty applications, offering robust performance and durability. Both models are equipped with a powerful engine, with the MS 650 featuring a 84.9 cc engine and the MS 660 slightly larger at 91.6 cc, providing substantial power for demanding tasks. These chainsaws incorporate advanced Stihl technology, including the IntelliCarb™ compensating carburetor, which automatically adjusts the air/fuel ratio to maintain consistent engine performance, and the ElastoStart™ starter handle, which reduces shock during starting.

The MS 650 and MS 660 feature a decompression valve to facilitate easier starting and a side-access chain tensioner for quick chain adjustments. They are also equipped with an anti-vibration system that minimizes operator fatigue during prolonged use. The chainsaws' design includes a high-capacity air filtration system, which extends the interval between filter cleanings and enhances engine longevity.

In terms of weight, the MS 650 is approximately 6.5 kg (14.3 lbs) without cutting equipment, while the MS 660 weighs around 7.3 kg (16.1 lbs), making them relatively manageable for their power class. Both models support a range of guide bar lengths, typically from 20 inches to 36 inches, accommodating various cutting needs. Safety features include a chain brake and a hand guard to protect the operator. The MS 650 and MS 660 are engineered for reliability and efficiency, making them ideal tools for professional loggers and arborists who require high performance and dependability in their equipment.

Stihl MS 650 MS 660 F.A.Q.

How do I properly start my Stihl MS 650 or MS 660 chainsaw?

To start your Stihl MS 650 or MS 660, first engage the chain brake. Set the Master Control Lever to the cold start position. Pull the starter handle until you feel resistance, then give it a brisk pull. Once the engine fires, move the Master Control Lever to the warm start position and pull again to start the engine.

What is the recommended maintenance routine for the Stihl MS 650 MS 660?

Perform regular maintenance by cleaning the air filter, checking the spark plug, sharpening the chain, and ensuring proper chain tension. Lubricate the sprocket and inspect the guide bar for wear. Regularly check fuel and oil levels.

How can I troubleshoot my chainsaw if it won't start?

If your chainsaw won't start, check the fuel level and ensure the fuel is fresh. Inspect the spark plug for fouling and replace if necessary. Make sure the air filter is clean and the choke is in the correct position.

What type of fuel and oil mixture should be used for the Stihl MS 650 MS 660?

Use a 50:1 ratio of unleaded gasoline to Stihl two-stroke engine oil. Ensure the gasoline has an octane rating of at least 89 and is ethanol-free if possible.

How do I sharpen the chain on my Stihl MS 650 MS 660?

To sharpen the chain, secure the chainsaw and use a round file that matches the chain's pitch. File each cutter at the same angle and depth, and maintain a consistent number of strokes per cutter to ensure even sharpening.

What should I do if my chainsaw's chain keeps getting loose?

If the chain keeps getting loose, check the chain tension regularly and adjust it using the tensioning screw. Ensure the guide bar nuts are properly tightened. Check for wear on the chain and sprocket.

How often should I clean or replace the air filter on my Stihl chainsaw?

Clean the air filter after every 5 hours of operation or more frequently in dusty conditions. Replace the air filter if it shows signs of damage or excessive clogging.

What are the signs of a dull chainsaw chain?

Signs of a dull chain include needing to apply more force to cut, producing fine sawdust instead of coarse chips, and smoke during cutting, even if the chain is properly lubricated.

How can I prevent my Stihl MS 650 MS 660 from overheating?

Prevent overheating by ensuring the air intake and cooling fins are clean and clear of debris. Use fresh, properly mixed fuel and avoid running the chainsaw at full throttle for extended periods.

What is the correct way to store my Stihl chainsaw when not in use?

When storing your chainsaw, clean it thoroughly, empty the fuel tank, and run the engine until it stops to clear any remaining fuel. Store it in a dry, cool location away from direct sunlight.