Instruction Manual
Table Of Contents
- STIHL MS 661 C-M
- 1 Introduction
- 2 Guide to Using this Manual
- 3 Overview
- 4 Safety Precautions
- 5 Preparing the Saw for Operation
- 6 Assembling the Saw
- 7 Engaging and Disengaging the Chain Brake
- 8 Mixing Fuel and Refueling the Chainsaw
- 9 Starting and Stopping the Engine
- 10 Checking the Saw
- 11 Operating the Saw
- 12 After Finishing Work
- 13 Transporting
- 14 Storing
- 15 Cleaning
- 16 Maintenance
- 17 Repairing
- 18 Troubleshooting
- 19 Specifications
- 20 Bar and Chain Combinations
- 21 Spare Parts and Accessories
- 22 Disposal
- 23 EC Declaration of Conformity
1 Front Hand Guard
Helps protect operator’s left hand from con‐
tact with the saw chain, serves to engage the
chain brake and activates the chain brake by
inertia in certain kickback situations.
2 Muffler
Reduces chainsaw noise emissions.
3 Guide Bar
Supports and guides the saw chain.
4 Saw Chain
Cuts the wood.
5 Spiked Bumper
Toothed stop for holding saw steady against
wood while cutting.
6 Tensioning Screw
Adjusts chain tension.
7 Chain Sprocket
Toothed wheel that drives the chain.
8 Chain Catcher
Reduces risk of operator contact with the
chain if it comes off the bar or breaks.
9 Nuts
Secure chain sprocket cover to the chainsaw.
10 Chain Sprocket Cover
Covers the chain sprocket and secures the
guide bar to the chainsaw.
11 Chain Scabbard
Helps protect user from contact with saw
chain.
12 Handlebar
For holding, controlling and carrying the
chainsaw.
13 Oil Tank Cap
Closes the oil tank.
14 Limit Stop
Limits travel of oil pump adjusting screw.
15 Oil Pump Adjusting Screw
Serves to adjust chain oil feed rate.
16 Starter Grip
Serves to crank the engine.
17 Fuel Tank Cap
Closes the fuel tank.
18 Master Control Lever
For starting, running and stopping the engine.
19 Throttle Trigger
Controls engine speed.
20 Rear Hand Guard
Protects operator’s right hand from contact
with the chain if it comes off the bar or
breaks.
21 Rear Handle
For operating, holding and controlling the
chainsaw.
22 Throttle Trigger Lockout
Unlocks the throttle trigger.
23 Air Filter
Filters the air entering the engine.
24 Spark Plug Boot
Connects ignition lead to spark plug
25 Spark Plug
Ignites fuel-air mixture in the engine.
26 Decompression Valve
Eases engine starts.
27 Shroud
Covers the engine.
28 Shutter
Serves to select summer or winter operating
mode.
29 Filter Cover
Covers the air filter.
30 Filter Cover Lock
Secures filter cover to chainsaw.
# Serial Number
3.2 Features
The chainsaw may be equipped with the follow‐
ing features:
0000-GXX-A393-A0
1
1 Handle heating switch
Switches the handle heating on and off.
Heats the front and rear handles.
3.3 Symbols
Meanings of symbols that may be on the chain‐
saw:
This symbol marks the fuel tank.
This symbol marks the chain oil tank.
3 Overview English
0458-759-0121-D. VA0.A21. 3