STIHL 029 Parts Manual

The STIHL 029 is a professional-grade chainsaw known for its reliability and performance. This parts manual provides detailed information on the components, assembly, and maintenance of the STIHL 029 chainsaw. Below are key sections covering parts identification, diagrams, ordering information, maintenance procedures, and troubleshooting.

Parts Identification & Diagrams

Exploded view diagrams with corresponding part numbers for the STIHL 029 chainsaw.

Diagram Section	Description
Cylinder & Piston Assembly	Includes cylinder, piston, rings, wrist pin, and clips
Crankcase & Crankshaft	Main engine housing, crankshaft, bearings, and seals
Carburetor Assembly	WT-194 carburetor, throttle linkage, fuel lines, and gaskets
Clutch & Sprocket	Centrifugal clutch, drum, rim sprocket, and retaining nuts
Guide Bar & Chain	Rollomatic E bar, saw chain, bar nuts, and tensioning system
Starter Assembly	Rewind starter, pulley, spring, rope, and handle
Air Filter Cover	Plastic cover, pre-cleaner, filter element, and fasteners
Muffler & Exhaust	Spark arrestor muffler, gasket, heat shield, and mounting bolts
Front & Rear Handles	Anti-vibration system, handlebar, trigger, and safety lever
Tank & Fuel Cap	Fuel tank, oil tank, caps, vent lines, and filters

Engine Components

Detailed breakdown of the internal combustion engine parts.

1. Cylinder: 44mm bore, cast aluminum with Nikasil plating.
2. Piston: Two-ring design, includes wrist pin and circlips.
3. Crankshaft: Forged steel with integrated counterweights.
4. Connecting Rod: Needle bearing big end, small end bushing.
5. Crankcase: Magnesium alloy, split design with gasket.
6. Bearings & Seals: Main bearings (6202 & 6203), crankshaft seals.

WARNING! Engine components are precision parts; handle with care to avoid damage. Use proper tools for disassembly/assembly.

Cutting & Guide Bar Assembly

Components related to the cutting attachment and chain drive.

1. Guide Bar: STIHL Rollomatic E, 16" to 20" length options.
2. Saw Chain: 3/8" pitch, .050" gauge, round-chisel or semi-chisel.
3. Drive Sprocket: Rim-type sprocket (7-tooth standard).
4. Clutch: Centrifugal, 3-shoe design with drum.
5. Chain Tensioner: Screw-adjust type with pin and worm gear.
6. Bar Nuts: M8 flange nuts for securing guide bar.
7. Chain Catcher: Safety device to prevent broken chain contact.
8. Sprocket Cover: Plastic clutch cover with chain brake (if equipped).

CAUTION! Always ensure chain brake is functional before operation. Replace worn sprockets and chains together.

Fuel & Lubrication System

• Fuel Tank: Capacity 0.55 US quarts (0.52 liters).
• Oil Tank: Capacity 0.26 US quarts (0.25 liters) for chain oil.
• Carburetor: WT-194 with H, L, and LA adjustment screws.
• Fuel Filter: In-tank sintered bronze filter element.
• Fuel Lines: Tygon-type lines from tank to carburetor and primer.
• Oil Pump: Manual adjustable pump driven by gear from clutch drum.
• Oil Lines: Supply line from tank to pump, delivery line to bar.
• Tank Caps: Venting caps with integrated filters.

Ignition & Electrical System

Components for engine starting and spark generation.

Ignition Module: Electronic, non-adjustable, with kill wire.

Spark Plug: Bosch WSR6F or NGK BPMR7A, gap 0.020".

Stop Switch: Grounding type switch on handle.

Rewind Starter: Rope, pulley, spring, pawls, and starter handle.

Flywheel: Magneto with cooling fins and keyway.

Wiring: Kill switch wire, spark plug wire, ground connections.

Air Filter & Cooling System

Air intake and engine cooling components.

1. Remove air filter cover by rotating latches.
2. Air filter element: Felt or mesh, clean with soapy water and air dry.
3. Pre-cleaner: Optional foam insert for dusty conditions.
4. Cooling fins: Keep clean of debris for proper engine cooling.
5. Fan wheel: On flywheel, directs air over cylinder.
6. Deflectors: Ensure air flow is not obstructed.

Tip: Check air filter before each use. A dirty filter causes poor performance and engine damage.

Handle & Safety Features

Controls, handles, and safety devices.

1. Front Handle: D-shaped with integrated chain brake (on some models).
2. Rear Handle: Contains throttle trigger, throttle lockout, and stop switch.
3. Anti-Vibration System: Rubber mounts between engine and handles.
4. Chain Brake: Inertia-activated or manual via front hand guard.
5. Hand Guard: Protects right hand from kickback and activates chain brake.
6. Throttle Lockout: Must be depressed to operate throttle.
7. Debris Deflector: On clutch cover to direct sawdust away.
8. Spark Arrestor: In muffler to prevent emission of burning particles.

WARNING! Never operate a chainsaw with missing or defective safety features. Always wear proper PPE.

Maintenance Schedule

Regular maintenance tasks and intervals.

Interval	Task	Parts Required
Daily/Before Use	Check chain tension, sharpness, lubrication	Chain oil, file
Every 10 hours	Clean air filter, check spark plug	Filter element, spark plug
Every 20 hours	Clean cooling fins, check fuel filter	Fuel filter, cleaning brush
Every 50 hours	Replace spark plug, clean muffler screen	Spark plug, muffler gasket
Every 100 hours	Replace fuel filter, check carburetor settings	Fuel filter, carb kit
Annually	Check clutch springs, replace drive sprocket	Sprocket, clutch springs

Torque Specifications

Critical fastener torque values for proper assembly.

• Cylinder Nuts: 180 in-lbs (20 Nm)
• Crankcase Screws: 70 in-lbs (8 Nm)
• Clutch Nut: Left-hand thread, 250 in-lbs (28 Nm)
• Flywheel Nut: 400 in-lbs (45 Nm)
• Spark Plug: 180 in-lbs (20 Nm)
• Guide Bar Nuts: 70 in-lbs (8 Nm)
• Handle Mounting Bolts: 90 in-lbs (10 Nm)
• Muffler Bolts: 70 in-lbs (8 Nm)

CAUTION! Use a torque wrench for critical fasteners. Over-tightening can strip threads; under-tightening can cause failure.

Parts Ordering Information

How to identify and order genuine STIHL parts.

Use the 10-digit STIHL part number from diagrams. Contact an authorized STIHL dealer for ordering. Provide model number (029) and serial number (located on crankcase).

Common Part Numbers:

• Piston Kit: 1125 030 2005
• Cylinder: 1125 030 1203
• Carburetor Kit: 1125 007 1060
• Air Filter: 1125 120 1600
• Spark Plug: 0000 400 1300
• Guide Bar 16": 3003 000 2016
• Saw Chain 16": 3613 005 0065

Troubleshooting & Service

Symptom	Possible Cause	Corrective Action
Engine will not start	No spark, fuel issue, flooded	Check spark plug, fuel freshness, choke setting. Clean carburetor.
Engine runs poorly	Dirty air filter, clogged fuel filter, incorrect carb adjustment	Clean/replace filters. Adjust H and L screws per manual.
Chain does not turn	Clutch worn, sprocket damaged, chain brake engaged	Inspect clutch shoes and springs. Replace sprocket. Disengage brake.
Excessive vibration	Loose fasteners, unbalanced chain, AV mounts damaged	Tighten all bolts. Sharpen chain evenly. Replace AV mounts.
Chain does not oil	Oil tank empty, clogged oil line, pump failure	Fill tank. Clean oil passages. Inspect oil pump gear.
Overheating	Dirty cooling fins, lean carburetor setting, low oil mix	Clean fins. Enrich L screw. Use proper 50:1 fuel mix.

Service Note: For major repairs, consult an authorized STIHL service dealer.

Support: Contact STIHL USA at 1-800-467-8445 or visit www.stihlusa.com.