STIHL 044 Chainsaw Service & Parts Manual Set, 1990–2004

Use the service procedures for repair work and the later illustrated catalog to match assemblies and replacement parts to the machine’s configuration.

The step-by-step repair procedures are from the 1990 service manual; the July 2004 section is an illustrated parts catalog, not a second updated repair manual. STIHL directs later engineering changes to separate Technical Information Bulletins, which are not included in this PDF.

PDF Search, Navigation and Page Count

Text search and bookmarks: Both publications contain searchable PDF text. Embedded bookmarks cover the service-manual chapters and the beginning of the parts list; individual parts groups do not have separate bookmarks. The diagnostic flowcharts and test-connection table are readable.

One printable 158-page PDF contains both publications. The total includes the service manual’s foreword and contents pages, the parts-list title/index page and its final multilingual symbol-key/copyright page.

Engine Overhaul, Fault Tracing and Parts Identification

The following is a selection of covered work, rather than a complete contents list. Additional topics include tank-housing thread repair and servicing-aid specifications.

• Engine and crankcase repair: Cylinder and piston removal and installation, piston-ring service, crankshaft extraction and refitting, bearing and oil-seal replacement, and pressure/vacuum testing.

• Chain drive and lubrication: Clutch and sprocket service, chain-brake disassembly and assembly, chain-tensioner repair, oil-supply diagnosis and adjustable oil-pump repair.

• Starter and controls: Rewind-starter overhaul, AV handle components, Master Control linkage, throttle-trigger/interlock service and tank-housing removal.

• Fuel system: Carburetor removal, internal service, leakage testing and adjustment, plus air-filter, fuel-filter, hose and tank-vent diagnosis.

• Ignition system: Breakerless magneto fault tracing, ignition-lead and wiring-harness replacement, stop-switch service, ignition-module installation and flywheel removal.

• Heated-handle diagnostics: Dedicated fault chart, test connections, component specifications and wire routing, with service coverage for the switch, heating elements and generator.

• Illustrated parts identification: Seventeen lettered parts groups with OEM part numbers, version references, earlier-build markings and dated component changes.

The service manual states that it was prepared for STIHL servicing dealers and service-organization staff. It is best suited to experienced chainsaw technicians with the specified fixtures, testers, tachometer and electrical meter.

Engine and Exhaust Repair Depth

The repair manual carries the 044 through professional engine work, from exposing the cylinder to rebuilding the crankcase around the crankshaft. It identifies the crankshaft, connecting rod and big-end bearing as one replacement unit and calls for a complete crankcase assembly if either case half is damaged.

The standard and catalytic muffler sections cover removal, spark-arrestor inspection, the metal-carrier catalyst and the injector-nozzle/jet-tube cooling arrangement.

The leakage-testing section explains why crankshaft seals can pass a pressure test yet leak under vacuum. That distinction supports fault tracing when air leaks interfere with idle adjustment and acceleration. Oil-seal replacement is also described without complete crankcase disassembly.

Fuel, Ignition and Heating Diagnosis

Factory troubleshooting charts distinguish engine, ignition, starter, lubrication, fuel and chain-drive faults. Carburetor service extends to diaphragms, the inlet needle and control lever, valve jet, and throttle/choke shafts.

For heated handles, the fault chart separates wiring breaks, insulation faults, switch problems, generator faults and failed heating elements. The front-handle element is not separately replaceable; a failed element requires a replacement handle.

Variant and Parts Identification

The parts list distinguishes the HD-15B, USA-spec HD-17A, heated HD-11A and HD-10B carburetor family from C3M-S12B/S12A and C3M-S5G/S5E/S20/S22/S23/S24 builds. Carburetor-heating hardware and a high-altitude jet are identified where applicable.

Earlier and later engine components are separated, including the early 10 mm piston-pin setup and the later 12 mm cylinder/piston arrangement with a decompression valve. Match parts-list change markings and the machine’s configuration rather than publication dates alone.

The exploded plates are keyed directly to the parts tables. Examples cover the crankcase and crankshaft, cylinder and catalytic muffler, oil pump and clutch, ignition system, automatic-choke carburetor, and handlebar/heating element.

The 044 R material includes distinct chain-sprocket-cover and AV components. The 044/MS 440 rescue-saw conversion kit is expressly marked as not for the USA; this parts illustration does not extend the service manual to general MS 440 repair.

Tools and Assembly References

Specification sections provide engine, fuel, ignition, cutting-attachment, weight, torque, leakage-test, carburetor-adjustment and electrical-test data.

A 34-entry special-tool schedule identifies the carburetor/crankcase tester 1106 850 2905, vacuum pump 0000 850 3500, test flange 1128 850 4200, piston snap-ring installing tool 5910 890 2210 and generator centering tool 1118 893 3500.

Repair Cautions

Replacement cylinders must stay with their matching pistons; incorrect cylinder alignment during installation can break the rings. The rear-handle heating element must lie flat without creases, since poor heat transfer can overheat and destroy it.

Chainsaw repair involves sharp cutting components, stored spring energy, fuel, hot exhaust parts, rotating drive components and potentially dangerous ignition voltage. This material is intended for trained service work with the saw properly secured and the specified tools in use.

Preview of Ignition and Fastener Specifications

For the breakerless ignition module, the specification tables list primary winding resistance of 0.7–1.0 Ω and secondary winding resistance of 7.7–10.3 kΩ. The repair text distinguishes workshop operational checks from detailed module testing requiring specialized equipment.

Assembly references include 33 Nm for the flywheel mounting nut and 50 Nm for the clutch carrier. The clutch section also identifies its left-hand thread.