Stihl MS 261 C-M Workshop Manual


Stihl MS 261 C-M Service Workshop Manual for the MS261 C-M chainsaw. View free page images online or download full PDF with images, diagrams and information. Print or save to any suitable device.
Download PDF Manual

Stihl MS 261 C-M Service Workshop Manual Repair

Stihl MS 261 C-M Service Workshop Manual for the Repair and service of MS261 C-M  chainsaws. The PDF manual has diagrams and detailed information to troubleshoot and repair the chainsaw. View free page images online or download a full digital PDF that you can easily save, print or view on all devices from mobiles, tablets or computers.

What’s covered in the Stihl MS 261 C-M Workshop Manual-Service manual, an M-Tronics Tech notes manual, a parts list and operator manuals.

Service PDF manuals cover every subject with detailed descriptions of repair and servicing methods specific to the MS261 C-M saw including  Stihl M-Tronics starting information, troubleshooting the carburetor, clutch, Chain Drive, Chain Lubrication and Tensioner, fuel, Starter, and the ignition system. Complete disassembly and assembly of all parts are described in detail.

Also suitable for: MS 261 C-M, MS 261 C-M VW,, MS 261 C-M VWZ Artic, MS 261 C-M Z, MS 261 C-MQ, MS 261 C-MQ Z, MS 261 C-Q and MS 261 C-Q Z chainsaws.

Detailed Description of the Stihl MS 261 C-M Workshop Manual

Specifications, M-Tronic Wiring, Troubleshooting Chart, Carburetor removal and installation, Carburetor Repair, Clutch, Chain Brake, Pistons, Engine, Ignition system, Starter, Servicing, Controls, Fuel System, Attachments and Special Tools.

This manual helps you with the information you need quickly and easily.

Stihl MS 261 C-M Chainsaw Specifications

Replace carburetor with a Zama carb: Zama 5Z OEM-C1Q S229A (MS 261 C-M 1141 120 0620)

MS261 C-M Engine

STIHL single-cylinder two-stroke engine
DISPLACEMENT: 3.06 (50.2 cc)
Bore: 1.76 in (44.7 mm)
Stroke: 1.26 in (32 mm)
ENGINE POWER: 4.0 HP (3.0 kW) at 10,000 rpm
Idle speed: 2,800 rpm
Cut-off speed: 14,000 rpm
Torque: 2.21 lbf.ft (3 Nm) at 7,000 rpm
Electronic magneto ignition
Spark plug (resistor type): Bosch WSR 6 F, NGK BPMR 7 A
Electrode gap: 0.02 in (0.5 mm)
All position diaphragm carburetor with an integral fuel pump
Fuel capacity: 16.9 fl.oz (0.50 l)
Fully automatic, speed-controlled oil pump with a rotary piston. Additional manual oil flow control
Oil tank capacity: 9.1 fl.oz (0.27 l)
Weight (without bar and chain): 10.8 lbs (4.9 kg)

MS261 C-M Cutting attachments
Rollomatic E guide bars

Reduced kickback STIHL guide bars (with green label)
Bar lengths: 40, 45, 50 cm (16, 18, 20 in.)
Pitch: .325″ (8.25 mm)
Groove width: 1.6 mm (0.063 in.)
Sprocket nose: 11-tooth

Saw chain.325″

Low kickback STIHL saw chain (with green label)
Rapid Micro 3 (26 RM3) Type 3634
Pitch: .325″ (8.25 mm)
Drive link gauge: 1.6 mm (0.063 in)

Chain sprocket

7-tooth for .325″ (spur sprocket)

Replace spark plug with Bosch WSR 6 F or NGK BPMR 7 A.

Starting the Stihl MS 261 C-M chainsaw by pressing the button, the decompression valve will be opened. The decompression valve is closed automatically when the engine fires for the first time. For this reason, press the button again before each additional starting attempt. You can flood an M-Tronic chainsaw quite easily if you’re used to old saws that required holding the throttle open to start.

You may need to RESET the M-Tronics, which is easy to do.

Sometimes hard starting problems can be malfunctioning solenoids that control the fuel mixture.

STIHL MS 261 C-M Chain Saw – Series 1141

Stihl MS 261 C-M Service Workshop Manual PDF

* Online preview