Craftsman M100 Lawn Mower Manual

The Craftsman M100 is a 21-inch push lawn mower featuring a 140cc Briggs & Stratton engine, 3-in-1 cutting system (mulch, bag, side discharge), single-lever height adjustment, easy-start technology, durable steel deck, and rear-wheel drive. This manual covers safety, assembly, operation, maintenance, troubleshooting, and specifications to ensure proper use and longevity of your mower.

Features at a Glance

Key components: 140cc Briggs & Stratton engine, 21-inch steel cutting deck, 3-in-1 discharge system, single-lever height adjustment, rear-wheel drive, foldable handle, and grass bag.

Assembly Instructions

Unpack all parts and inspect for damage. Assembly requires basic tools (included).

1. Attach handle: Align lower handle with deck brackets, secure with bolts and wing nuts.
2. Install upper handle: Connect to lower handle, tighten knobs.
3. Attach grass bag: Hook bag frame onto rear deck brackets.
4. Install side discharge chute (if using): Attach to discharge opening.
5. Add engine oil: Use SAE 30 detergent oil (approx. 20 oz).
6. Add fuel: Use fresh unleaded gasoline (87 octane or higher).

WARNING! Wear gloves during assembly. Ensure all fasteners are tight before operation.

Safety Precautions

Always follow safety guidelines to prevent injury.

1. Read manual thoroughly before use.
2. Clear mowing area of debris, rocks, and toys.
3. Wear sturdy shoes, long pants, and eye protection.
4. Do not mow wet grass or in poor visibility.
5. Never allow children or pets near mower during operation.
6. Disconnect spark plug before performing maintenance.
7. Use both hands on handle; walk, never run.
8. Refuel only when engine is cool, outdoors.

CAUTION! Engine and muffler become extremely hot. Avoid contact during and after use.

Specifications

• Model: Craftsman M100
• Engine: Briggs & Stratton 675 Series, 140cc, OHV
• Cutting Width: 21 inches
• Cutting Height Range: 1.25 - 3.75 inches (6 positions)
• Deck Material: Steel
• Drive: Rear-wheel drive
• Wheels: 8-inch rear, 7-inch front
• Fuel Type: Unleaded gasoline (87 octane minimum)
• Oil Type: SAE 30 detergent (API service class SJ or higher)
• Weight: 65 lbs (approx.)
• Warranty: 2-year limited

Controls and Operation

Handle Controls: Drive control lever (right), Height adjustment lever (center), Engine control lever (left).

Starting: 1. Push primer bulb 3 times (cold engine). 2. Set engine control to FAST. 3. Pull recoil starter firmly. Stopping: Release drive control, set engine control to STOP. Height Adjustment: Move single lever to desired position (1-6). Drive Control: Squeeze lever to engage drive; release to stop.

Cutting System Setup

3-in-1 system allows mulching, bagging, or side discharge.

1. Mulching: Install mulch plug in discharge opening. Grass clippings are cut finely and returned to lawn.
2. Bagging: Attach grass bag to rear brackets. Collects clippings for disposal.
3. Side Discharge: Install discharge chute. Ejects clippings to side (for tall/wet grass).

Tip: For best results, mow when grass is dry and never cut more than 1/3 of grass height at once.

Maintenance Schedule

Blade Sharpening: Disconnect spark plug. Remove blade, sharpen at 30-degree angle, balance before reinstalling.

Engine Care

Briggs & Stratton 675 Series engine requires regular maintenance.

1. Oil Change: Run engine briefly to warm oil. Drain via dipstick tube, refill with SAE 30 (20 oz).
2. Air Filter: Clean foam pre-cleaner every 25 hours; replace paper element if dirty.
3. Spark Plug: Gap at 0.030 inches; replace annually or every 50 hours.
4. Fuel: Use fresh unleaded gas. Add fuel stabilizer for storage over 30 days.

WARNING! Never check or add fuel while engine is running or hot.

Storage Guidelines

Proper storage extends mower life.

1. Clean underside of deck thoroughly.
2. Drain fuel tank or add fuel stabilizer and run engine 2 minutes.
3. Change oil if near service interval.
4. Remove spark plug, add 1 tablespoon oil to cylinder, pull starter slowly to coat.
5. Store in dry, covered area, preferably on level surface.
6. Cover mower to protect from dust.

CAUTION! Never store with fuel in tank indoors or near open flame.

Warranty Information

Craftsman M100 includes a 2-year limited warranty covering defects in materials or workmanship. Warranty does not cover normal wear, misuse, or lack of maintenance. Proof of purchase required. For warranty service, contact Craftsman Customer Support at 1-888-331-4569 or visit www.craftsman.com.

Troubleshooting

Service: For technical support, call 1-888-331-4569 or visit www.craftsman.com.