STIHL MS 341 / MS 361 Chainsaw Manual Set, 2003–2012 (P/N 0455 212 0123)

The service procedures and illustrated parts lists work together to connect repair instructions with component positions and model-specific parts entries.

For current replacement-part numbers and engineering changes after publication, consult the latest applicable STIHL parts information and Technical Information bulletins.

Searchable PDFs and Drawing Detail

Text search and navigation: All three PDFs contain searchable text. The service manual has chapter and subsection bookmarks; the parts lists have no embedded bookmarks, and their drawing callout numbers are not searchable. Small labels in harness-routing views and parts illustrations are easier to read when zoomed.

The RAR download contains three printable English PDFs totaling 164 pages. The service manual’s count includes its front and back covers and three otherwise blank pages.

Engine, QuickStop Super, and Heating Service

These selected content highlights outline the repair coverage. Other documented topics include AV-system buffer replacement and Master Control switch-shaft service.

• Engine and crankcase repair: Step-by-step procedures for cylinder and piston replacement, piston-ring inspection, crankcase separation, crankshaft installation, and pressure/vacuum leakage testing.

• Clutch and chain braking: Clutch drum, sprocket, and clutch service; separate QuickStop Super procedures, brake-cable play adjustment, coasting-brake checks, and chain-tensioner repair.

• Fuel and air systems: Carburetor removal, leakage testing, metering and pump diaphragm service, inlet-needle inspection, accelerator-pump repair, and air-filter servicing.

• Chain lubrication: Oil-pump removal and internal service, pickup-body and suction-hose replacement, oil-tank valve cleaning, and lubrication troubleshooting.

• Ignition and starting: ZAT 3/ZAT 4 spark testing, ignition-module replacement, flywheel removal, wiring-harness checks, and rewind-starter repair.

• Heated configurations: Carburetor-heater and handle-heater diagnosis, thermostat checks, generator testing, heater replacement, and configuration-specific harness routing.

• Parts identification: Exploded assemblies paired with reference numbers, quantities, descriptions, STIHL item codes, and model or regional application notes.

The service manual is intended exclusively for properly equipped repair shops, with tooling, test equipment, and procedural depth suited to technicians experienced in chainsaw repair.

Crankcase Diagnosis and Internal Engine Work

The leakage-testing sections explain how unwanted air entering through seals, gaskets, or cracked castings affects idle adjustment and throttle response. The vacuum test addresses oil-seal faults that may remain undetected during a pressure test, giving technicians a way to investigate persistent running problems before selecting repair work.

Oil seals can be replaced without complete crankcase disassembly. Internal-engine coverage extends to bearings and crankshaft assembly; the crankshaft, connecting rod, and needle bearing are treated as an inseparable replacement unit.

Carburetors, Controls, and Starting Equipment

The parts lists identify the HD-35A carburetor for the MS 341 and HD-34A for the MS 361 family. Carburetor service distinguishes fixed-jet work, limiter-cap removal, basic settings, and user adjustment. Fuel-supply coverage includes tank ventilation, the fuel hose, pickup body, and tank-housing replacement.

Rewind-starter instructions cover pawls, the rope rotor, starter rope and grip, guide-bushing replacement, spring replacement, and tensioning. Chain-drive service also addresses the chain catcher and bar-mounting studs.

Variant Parts and Electrical References

The MS 361 parts list distinguishes MS 361, MS 361 C, MS 361 W, and MS 361 WVH configurations. Its entries separate QuickStop Super components, heated handles, WVH carburetor-heating hardware, and cylinder, muffler, and spark-arresting-screen applications for the USA, Canada, Australia, and New Zealand.

Named exploded views include Crankcase; Cylinder, Muffler; Oil pump, Clutch; Chain brake; Ignition system, Wiring harness; and Heating.

Electrical documentation combines ignition troubleshooting flowcharts, carburetor-heater and generator/handle-heater charts, connector views, and component test tables. Harness routing is shown separately for unheated saws, handle-heated saws, and combined handle/carburetor heating. This is not a separate full-system wiring-diagram publication; ignition timing is fixed rather than adjustable during repair.

Special Tools and Repair Cautions

The tool section identifies carburetor/crankcase tester 1106 850 2905, vacuum pump 0000 850 3501, crankshaft tools ZS 5910 007 2200 / 5910 007 2220 and AS 5910 007 2205, flywheel puller 1135 890 4500, and ignition testers ZAT 4 5910 850 4503 and ZAT 3 5910 850 4520, with their applications.

The chain-brake chapter warns that incorrect spring-anchor-pin removal can damage the formed bead in the crankcase bore and impair brake operation. The starter chapter warns that excessive rewind-spring tension can break the spring.

Powered testing involves a moving chain, high ignition voltage, and flammable gasoline. Follow the instruction manual’s precautions, perform fuel work outdoors away from ignition sources, and confirm correct chain-brake operation before returning the saw to service.

A Preview of Engine Specifications and Heater Checks

Both engines are specified at 59.0 cm³, with a 47 mm bore and 34 mm stroke. The engine table rates the MS 341 at 3.1 kW (4.1 bhp) and the MS 361 at 3.4 kW (4.6 bhp), both at 9,500 rpm.

For handle-heated configurations, the individual heating-element checks specify approximately 1 Ω for the rear handle and 4 Ω for the front handle at an ambient temperature of +25 °C (77 °F).