stihl 029 chainsaw parts manual

The STIHL 029 Chainsaw is a professional-grade gasoline-powered chainsaw designed for demanding cutting tasks. This parts manual provides detailed diagrams, part numbers, and ordering information for all components of the STIHL 029 model, including the engine assembly, cutting attachment, fuel system, ignition system, air filtration, starter, clutch, chain brake, and housing components. Below are key sections for identification, engine parts, cutting attachment, fuel system, ignition, and ordering.

Model Identification & Specifications

Locate the model and serial number on the saw's identification plate. Key specifications for the STIHL 029.

Feature	Description
Engine Displacement	56.5 cc (3.45 cu. in.)
Power Output	3.4 bhp (2.5 kW)
Fuel Tank Capacity	0.55 US pt (0.26 l)
Oil Tank Capacity	0.40 US pt (0.19 l)
Guide Bar Length (Max)	20 inches (50 cm)
Chain Pitch	3/8" PMM or .325"
Weight (Powerhead)	12.8 lbs (5.8 kg)
Ignition System	Electronic, capacitor discharge (CDI)
Carburetor	STIHL ZAMA or equivalent diaphragm carb
Standard Chain	STIHL Oilomatic 3/8" PMM, .063" gauge

Engine Assembly & Crankcase

Major engine components and crankcase parts.

1. Crankcase Halves: Includes bearings, seals, and mounting screws.
2. Crankshaft Assembly: Main shaft with connecting rod and crankpin.
3. Cylinder Base Gasket: Seals cylinder to crankcase.
4. Engine Mounts: Anti-vibration elements connecting engine to housing.

WARNING! Always disconnect the spark plug before disassembling engine components. Crankcase halves are matched; do not mix parts from different assemblies.

Cylinder, Piston & Crankshaft

Parts for the combustion chamber and rotating assembly.

1. Cylinder: Includes cooling fins, exhaust port, and transfer ports.
2. Piston: With piston rings (compression and scraper ring) and wrist pin.
3. Crankshaft: Complete assembly with main bearings and seals.
4. Connecting Rod: Connects piston to crankshaft.
5. Gaskets & Seals: Cylinder base gasket, exhaust gasket, crank seals.

CAUTION! Measure piston and cylinder for wear and scoring before ordering replacements. Always replace circlips when servicing the piston.

Fuel System & Carburetor

• Fuel Tank: Includes cap, vent, and fuel pickup line.
• Carburetor: STIHL ZAMA model with adjustment screws (H, L, LA), throttle linkage, and diaphragm kit.
• Fuel Filter: In-tank filter element.
• Fuel Lines: Supply and return lines, impulse line for pump diaphragm.
• Air Filter: Pre-filter and main filter element.
• Throttle Control: Throttle trigger, cable, and lockout.
• Choke/Start Control: Lever and linkage for starting enrichment.

Ignition System & Flywheel

Components for spark generation and timing.

Ignition Module (CDI): Electronic control unit, mounted near flywheel.

Flywheel: Includes magnets, fan blades, and keyway.

Spark Plug: STIHL recommended type (e.g., BOSCH WSR6F or equivalent).

Stop Switch: Wire and contact for grounding ignition.

Ignition Wire & Boot: High-tension lead from coil to spark plug.

WARNING: The ignition system produces high voltage. Handle modules carefully and avoid shorting terminals.

Air Filtration & Cooling

Air filter system and cooling components.

1. Air Filter Cover: Latches and screws.
2. Filter Elements: Pre-filter (foam) and main filter (felt/paper).
3. Carburetor Cover/Heat Shield: Protects carb from heat.
4. Cylinder Cover: Directs cooling air over fins.
5. Fan & Flywheel: Draws air through the housing.

Tip: Clean air filter regularly. A dirty filter is a common cause of poor performance and overheating.

Starter Assembly & Rewind

Parts for the pull-start mechanism.

1. Starter Housing: Contains pulley and spring.
2. Rewind Spring: Provides retraction force.
3. Starter Rope: Handle and cord.
4. Pulley & Pawls: Engagement mechanism for crankshaft.
5. Spring Anchor & Screws: Mounting points for rewind spring.

WARNING! The rewind spring is under tension. Use proper tools and follow safety procedures when disassembling the starter to prevent injury from spring release.

Clutch, Sprocket & Chain Brake

Drive and safety components.

Centrifugal Clutch: Shoes, springs, drum, and retaining clip.

Drive Sprocket: Rim sprocket or spur sprocket, retaining nut.

Chain Brake Band: Friction band for stopping the chain.

Chain Brake Handle/Guard: Front hand guard that activates brake.

Brake Spring & Lever: Mechanism to engage and reset the brake.

Cutting Attachment & Guide Bar

Components for the cutting system.

1. Guide Bar: Various lengths, .063" gauge, STIHL DURO or ROLLOMATIC.
2. Saw Chain: STIHL Oilomatic chain, pitch 3/8" PMM or .325".
3. Chain Tensioner: Screw, adjuster, and pin.
4. Bar Mounting Hardware: Nuts, bolts, and washers.
5. Chain Sprocket (Nose): Tip sprocket for reduced friction (if equipped).
6. Clutch Cover: Side cover that houses chain brake components.

CAUTION! Always match chain pitch and gauge to the guide bar and drive sprocket. Using mismatched components is dangerous and causes rapid wear.

Housing, Handles & Controls

External parts, handles, and control linkages.

Main Housing (Tank Unit): Combines fuel and oil tanks.

Front Handle: With anti-vibration elements.

Rear Handle: Trigger housing and rear grip.

Throttle Interlock/Lockout: Safety lever.

Master Control Lever: Combined choke/stop/run control.

Decompression Valve: Button to reduce compression for easier starting (if equipped).

Muffler: Spark arrestor screen and mounting gasket.

Parts Ordering & Exploded Diagrams

Component Group	Diagram Reference	Key Part Numbers (Example)
Engine Crankcase	Diagram 1	Crankcase 1128 030 1201; Crankshaft 1128 030 0800
Cylinder & Piston	Diagram 2	Cylinder 1128 030 2003; Piston 1128 030 2005
Carburetor & Fuel	Diagram 3	Carb Kit 1128 007 1050; Fuel Line 1128 358 7700
Ignition	Diagram 4	Ignition Module 1128 400 1305; Flywheel 1128 400 1203
Starter	Diagram 5	Starter Assembly 1128 080 1801; Rope 1128 080 1400
Clutch & Sprocket	Diagram 6	Clutch Drum 1128 640 2000; Rim Sprocket 1128 007 1015
Chain Brake	Diagram 7	Brake Band 1128 650 3401; Spring 1128 650 3403
Guide Bar & Chain	Diagram 8	Guide Bar 3003 000 2016; Chain 63PM-72
Housing & Handles	Diagram 9	Tank Unit 1128 790 4701; Front Handle 1128 790 4800

Ordering: Use the full part number from the corresponding exploded diagram. Always specify your model and serial number.

Support: For genuine STIHL parts, contact an authorized STIHL dealer or visit www.stihlusa.com.