The Husqvarna 353 is a professional-grade chainsaw featuring a 50.1cc engine, X-Torq technology for reduced emissions and fuel consumption, a robust construction with magnesium crankcase, and an air injection system for extended air filter life. This parts manual provides detailed diagrams, part numbers, and ordering information for maintenance, repair, and replacement of all components. Below are key sections covering safety, parts identification, assembly diagrams, ordering, and maintenance procedures.
Key components: X-Torq engine, magnesium crankcase, air injection system, combined choke/stop control, inertia-activated chain brake, side-mounted chain tensioner, and low vibration system.
| Feature | Description |
|---|---|
| Engine Type | 2-stroke, single cylinder, X-Torq technology |
| Displacement | 50.1 cc |
| Power Output | 3.0 kW (4.0 hp) |
| Fuel Tank Volume | 0.55 liters |
| Oil Tank Volume | 0.26 liters |
| Recommended Bar Length | 13" to 20" (33 cm to 50 cm) |
| Chain Pitch | 3/8" or .325" |
| Weight (powerhead) | 5.3 kg (11.7 lbs) |
| Ignition System | Electronic, semi-transistorized |
| Vibration Dampening | Low vibration handles |
Always wear protective equipment: helmet, gloves, eye protection, hearing protection, and chainsaw chaps.
WARNING! Chainsaws are dangerous tools. Improper use or maintenance can cause serious injury or death. Always follow safety procedures.
Refer to diagrams for part numbers. Major assemblies: Engine (crankshaft, cylinder, piston), Fuel System (tank, carburetor, filter), Cutting Equipment (bar, chain, sprocket), Ignition (spark plug, coil), and Controls (throttle, choke, chain brake).
Note: Always use genuine Husqvarna replacement parts to ensure performance and safety.
Part numbers for key engine parts:
| Part Description | Part Number | Notes |
|---|---|---|
| Cylinder Assembly | 503 87 47-01 | Includes cylinder and decompression valve |
| Piston Kit | 503 87 48-01 | Piston, rings, wrist pin, circlips |
| Crankshaft | 501 84 62-01 | Complete with bearings |
| Carburetor (Zama C1Q-S267) | 545 01 40-01 | Includes gaskets and diaphragm |
| Air Filter | 503 81 46-01 | Pre-filter and main filter element |
| Spark Plug | Champion RCJ7Y | Gap 0.5 mm (0.020") |
| Ignition Coil | 544 09 13-01 | Electronic ignition module |
| Muffler | 503 87 49-01 | With spark arrestor screen |
Parts for guide bar, chain, and drive system:
WARNING! Always use matched bar, chain, and sprocket pitch. Mismatched components cause excessive wear and can be dangerous.
Fuel tank, lines, and crankcase components.
| Component | Part Number |
|---|---|
| Fuel Tank Assembly | 501 87 51-01 |
| Fuel Cap | 501 84 75-01 |
| Fuel Filter | 501 84 76-01 |
| Fuel Line (Internal) | 544 01 13-01 |
| Impulse Line | 544 01 14-01 |
| Oil Pump | 501 87 52-01 |
| Oil Cap | 501 84 77-01 |
| Crankcase Half (Magnesium) | 503 87 50-01 |
Tip: Inspect fuel lines annually for cracks and replace if necessary.
To order parts, contact an authorized Husqvarna dealer with the model number (353) and part number.
Note: Part numbers are subject to change. Verify with your dealer for the latest information.
| Interval | Task | Parts/Notes |
|---|---|---|
| Daily | Check chain tension and sharpness | Adjust tension; sharpen if dull |
| Daily | Check chain brake function | Test activation |
| Every 10 hours | Clean air filter | Part # 503 81 46-01 |
| Every 20 hours | Clean spark arrestor screen | Part of muffler |
| Every 3 months | Replace fuel filter | Part # 501 84 76-01 |
| Annually | Replace spark plug | Champion RCJ7Y |
| As needed | Replace drive sprocket | Part # 501 84 71-01 |
| As needed | Replace guide bar and chain | Matched set per specifications |
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine will not start | No spark, fuel issue, flooded | Check spark plug; ensure fresh fuel mix; check carburetor. |
| Engine runs poorly | Clogged air/fuel filter, carb adjustment | Clean/replace filters; adjust carburetor (H/L screws). |
| Chain does not turn | Clutch worn, sprocket damaged, brake engaged | Inspect clutch/sprocket; disengage chain brake. |
| Excessive vibration | Loose components, unbalanced chain | Tighten all bolts/nuts; balance and sharpen chain. |
| Oil not feeding to chain | Clogged oil passages, faulty pump | Clean oil ports; check oil pump function. |
| Overheating | Dull chain, lean fuel mix, clogged cooling fins | Sharpen chain; adjust carburetor; clean cylinder fins. |
Service: For repairs beyond basic maintenance, contact an authorized Husqvarna service dealer.
Support: Husqvarna Customer Service: 1-800-487-5962; www.husqvarna.com