The Craftsman 18 42cc Chainsaw is a gas-powered chainsaw designed for general cutting tasks, featuring an 18-inch guide bar, a 42cc 2-cycle engine, automatic oiling system, chain brake, and anti-vibration handles. This manual provides detailed parts identification, assembly instructions, maintenance procedures, and safety guidelines. Below are key sections for safety, parts list, assembly, operation, maintenance, and troubleshooting.
Always wear protective gear: safety glasses, hearing protection, gloves, chainsaw chaps, and steel-toed boots. Keep bystanders at a safe distance.
| Hazard | Precaution |
|---|---|
| Kickback | Hold saw firmly with both hands; keep chain sharp; avoid tip contact |
| Fuel handling | Use fresh fuel mix (50:1); refuel in well-ventilated area away from sparks |
| Chain contact | Engage chain brake when not cutting; keep hands away from moving chain |
| Electrical hazards | Keep away from power lines; do not operate in wet conditions |
| Exhaust fumes | Operate in well-ventilated area to avoid carbon monoxide poisoning |
Key components: Engine assembly, guide bar, cutting chain, chain brake, throttle trigger, choke control, primer bulb, oil tank, fuel tank, spark plug, air filter, muffler.
WARNING! Always disconnect spark plug before performing maintenance.
Unpack and inspect all parts. Assembly requires basic tools (screwdriver, wrench).
CAUTION! Chain must be properly tensioned to prevent derailment or breakage.
Starting procedure: Place on flat surface, engage chain brake, set choke, pull starter cord.
Cold Start: Move choke lever to FULL position, press primer bulb 5 times, pull starter cord until engine fires, move choke to HALF, pull until starts, then open choke.
Warm Start: Choke in OPEN position, pull starter cord.
Cutting techniques: Use lower part of bar for cutting; let chain do the work; avoid pinching bar. Always stop engine before moving between cutting locations.
Daily: Check chain tension, sharpen chain, clean air filter, inspect bar for wear.
Weekly: Clean spark arrestor screen, check fuel lines for cracks.
Monthly: Clean cooling fins, check clutch drum and sprocket.
Seasonally: Replace spark plug, clean carburetor, replace fuel filter.
Tip: Use only genuine Craftsman replacement parts for optimal performance.
Proper chain maintenance ensures cutting efficiency and safety.
WARNING! Dull chain increases kickback risk and reduces cutting efficiency.
Three adjustment screws: L (low speed), H (high speed), T (idle).
CAUTION! Improper adjustment can cause engine damage or unsafe operation.
Long-term storage (over 30 days) requires proper preparation.
Tip: Use fuel stabilizer if storing with fuel for short periods.
Craftsman 18 42cc Chainsaw comes with a 2-year limited warranty covering defects in materials and workmanship. Warranty does not cover normal wear, misuse, or improper maintenance. Keep original receipt as proof of purchase. For warranty service, contact Craftsman Customer Service at 1-888-331-4569 or visit www.craftsman.com.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Old fuel, clogged filter, no spark | Use fresh fuel mix; clean/replace air filter; check spark plug gap (.025") |
| Engine runs poorly | Dirty carburetor, fuel line issues | Clean carburetor; inspect fuel lines for cracks; adjust carburetor |
| Chain doesn't turn | Clutch worn, drive sprocket damaged | Inspect clutch shoes; replace drive sprocket if worn |
| Excessive vibration | Loose components, unbalanced chain | Tighten all fasteners; balance chain by sharpening evenly |
| Chain throws oil | Over-oiling, wrong oil viscosity | Adjust oiler screw; use proper bar & chain oil |
| Chain comes off bar | Loose chain, worn bar, damaged drive links | Properly tension chain; replace bar if worn; inspect chain for damage |
Service: For technical assistance, call 1-888-331-4569 or visit www.craftsman.com/parts