Manual Chainsaw Sears 358.360.121

The Sears 358.360.121 is a gasoline-powered, two-stroke engine manual chainsaw designed for general-purpose cutting, pruning, and firewood preparation. It features a guide bar, chain, manual oiling system, anti-vibration handles, chain brake, throttle trigger lockout, and choke control. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Two-stroke engine, guide bar and chain, manual chain oiler, front and rear handles, chain brake, throttle trigger with lockout, choke lever, primer bulb, and spark plug.

Assembly & Preparation

Unpack and inspect all parts. Assemble on a clean, flat surface.

1. Attach guide bar and chain: Place bar on sprocket, loop chain around bar and drive sprocket, adjust tension.
2. Fill fuel tank: Use fresh gasoline mixed with two-stroke oil at 50:1 ratio (check manual).
3. Fill chain oil tank: Use bar and chain oil only.
4. Check all fasteners: Ensure nuts, bolts, and screws are tight.

WARNING! Always wear protective gear (gloves, eye protection, hearing protection, chainsaw chaps, sturdy boots). Never operate without proper bar and chain lubrication.

First-Time Use

Perform pre-operation checks before starting.

1. Check chain tension: Chain should be snug against bar but pull freely by hand.
2. Test chain brake: Engage brake by pushing forward on front hand guard; chain should stop immediately.
3. Start engine: Place on ground, engage chain brake, set choke, pull starter cord until engine fires, then disengage choke and pull again.
4. Warm up: Allow engine to run at idle for 30 seconds before cutting.

CAUTION! Keep bystanders and pets at least 15 feet away. Plan your cut and escape path before starting.

Specifications

• Engine Displacement: Typically 40cc to 45cc (model dependent).
• Fuel Capacity: Approximately 0.5 US pints (varies).
• Chain Oil Capacity: Approximately 0.25 US pints.
• Ignition System: Electronic ignition.
• Weight: Approximately 10-12 lbs (powerhead only).
• Sound Level: Exceeds 100 dB(A); hearing protection required.
• Vibration Level: Reduced via anti-vibration mounts.
• Recommended Fuel: 89 octane or higher unleaded gasoline mixed with two-stroke oil.
• Spark Plug: Champion RCJ-6Y or equivalent.

Controls and Functions

Main controls located on the saw body. Front Handle: Chain brake lever (hand guard), throttle trigger, throttle lockout. Rear Handle: Starter grip, choke lever, primer bulb, master control lever (combines stop switch and choke).

Operation: To start, pull out choke, press primer bulb 5-10 times, engage chain brake, pull starter cord. To stop, push master control lever to "OFF" or "STOP".

Chain Tension Adjustment: Located near bar mount; use screwdriver or combination tool to turn adjusting screw.

Fuel & Lubrication

Fuel Mix: Use 50:1 gasoline to two-stroke oil ratio for most models (confirm in manual). Use fresh fuel (less than 30 days old). Chain Oil: Use only high-quality bar and chain oil. Do not use waste oil.

1. Fill fuel tank in a well-ventilated area, away from ignition sources.
2. Fill chain oil tank before each use.
3. Operate manual oiler button frequently during cutting to ensure lubrication.

Tip: Always clean area around fuel cap before opening to prevent debris from entering tank.

Operating Procedures

Supports felling, limbing, bucking, and pruning.

1. Starting: Follow cold/hot start procedure. Always engage chain brake when starting.
2. Cutting: Use full throttle when cutting. Let chain do the work; do not force.
3. Kickback Awareness: Keep nose of bar away from objects. Be aware of pinch points.
4. Manual Oiling: Press oiler button every 10-15 seconds of cutting.
5. Stopping: Release throttle, allow engine to idle, engage chain brake, move master control to "OFF".

WARNING! Never operate above shoulder height. Never cut with the upper tip (kickback zone). Always hold saw firmly with both hands.

Maintenance Schedule

Daily/Pre-Use: Check chain tension, sharpness, and lubrication. Check fuel and oil levels. Inspect for loose fasteners. Clean air filter. Weekly/Monthly: Clean spark arrestor screen. Check spark plug condition and gap. Clean cooling fins. Inspect guide bar for wear and groove depth. Seasonally: Replace fuel filter. Clean carburetor (if needed). Inspect anti-vibration elements.

Storage Guidelines

For long-term storage (over 30 days): Drain all fuel from tank and carburetor. Run engine until it stops. Remove chain, clean and soak in oil. Clean entire saw. Store in a dry, secure place, out of reach of children.

CAUTION! Storing with fuel in the carburetor will cause varnish and starting problems.

Safety Information

Read manual completely before use. Always wear Personal Protective Equipment (PPE). Keep work area clean and well-lit. Do not operate when tired or under the influence. Be aware of kickback—its causes and how to avoid it. Use proper cutting techniques. Maintain a firm grip and secure footing. Keep chain sharp and properly tensioned. The chain brake is a safety device; test it regularly.

Troubleshooting

Service: For repairs beyond basic maintenance, contact a qualified Sears service center or small engine technician.

Parts & Support: Use model number 358.360.121 for correct parts identification.