Craftsman M110 140cc 5.50 Manual

The Craftsman M110 is a 140cc walk-behind lawn mower with a 21-inch cutting deck, featuring a Briggs & Stratton 550EXi engine, 5.50 ft-lbs torque, 3-in-1 cutting system (mulch/bag/side discharge), single-lever height adjustment, durable steel deck, rear-wheel drive, and easy-start technology. This manual covers safety, operation, maintenance, troubleshooting, and specifications to ensure proper use and longevity of your mower.

1. Features at a Glance 2. Safety Information 3. Assembly & Setup 4. Specifications 5. Controls and Operation 6. Cutting System 7. Engine Operation 8. Maintenance Schedule 9. Storage 10. Warranty Information 11. Troubleshooting

Features at a Glance

Key components: 140cc Briggs & Stratton 550EXi engine, 21-inch steel cutting deck, 3-in-1 cutting system, single-lever height adjustment, rear-wheel drive, and easy-start technology.

Feature	Description
Engine	Briggs & Stratton 140cc 550EXi, 5.50 ft-lbs torque
Cutting Width	21 inches
Cutting System	3-in-1 (Mulch, Bag, Side Discharge)
Height Adjustment	Single-lever, 6 positions (1.25-3.75 inches)
Drive System	Rear-wheel drive
Deck Material	Durable steel
Fuel Tank	1.0 quart capacity
Starting System	Recoil start with easy-start technology
Warranty	2-year limited warranty
Weight	Approx. 65 lbs

Safety Information

Read all instructions before operating. Always wear appropriate safety gear.

Clear mowing area of debris, rocks, and toys.
Never operate without guards or safety devices in place.
Do not mow on steep slopes or wet grass.
Keep hands and feet away from moving parts.
Stop engine before unclogging or adjusting.

WARNING! Gasoline is flammable; refuel outdoors with engine off and cool. Keep children and pets away during operation.

Assembly & Setup

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

Attach handle: Align with deck brackets, secure with provided bolts.
Install grass bag: Attach bagger frame to rear deck, secure bag.
Add oil: Use SAE 30 detergent oil (approx. 20 oz). Check dipstick.
Add fuel: Use fresh unleaded gasoline (87 octane min).
Check tire pressure: Inflate to 15 PSI.

CAUTION! Ensure all bolts are tightened securely. Do not operate without proper oil and fuel levels.

Specifications

Engine: Briggs & Stratton 550EXi, 140cc, 4-cycle.
Power: 5.50 ft-lbs torque.
Cutting Width: 21 inches.
Cutting Height: 1.25-3.75 inches (6 positions).
Deck: Steel, 3-in-1 capability.
Drive: Rear-wheel drive.
Fuel Capacity: 1.0 quart.
Oil Capacity: 20 oz (SAE 30).
Weight: 65 lbs (approx.).
Warranty: 2-year limited.

Controls and Operation

Handle Controls: Drive control lever, height adjustment lever, engine control (stop switch).

Starting: 1. Check oil/fuel. 2. Prime engine (3-5 presses). 3. Set throttle to FAST. 4. Pull recoil starter. Stopping: Release drive lever, move throttle to STOP, wait for blade to stop.

Height Adjustment: Move single lever to desired position (1-6). Drive Control: Squeeze lever to engage drive; release to stop. Bagging/Mulching: Install or remove bag/chute as needed.

Cutting System

3-in-1 System: Convert between mulching, bagging, and side discharge.

Mulching: Install mulch plug; grass clippings cut finely and returned to lawn.
Bagging: Attach grass bag; clippings collected for disposal.
Side Discharge: Install discharge chute; clippings ejected to side.

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

Engine Operation

Briggs & Stratton 550EXi: Air-cooled, 4-cycle, overhead valve.

Oil: Check before each use; change every 25 hours or seasonally.
Fuel: Use fresh unleaded gasoline; add fuel stabilizer for storage.
Air Filter: Clean every 25 hours; replace if damaged.
Spark Plug: Check/gap every season (0.030 inches).
Starting: Prime, set choke (if cold), pull starter firmly.

WARNING! Never run engine indoors; ensure area is well-ventilated.

Maintenance Schedule

Regular maintenance ensures performance and longevity.

Interval	Task
Before each use	Check oil level, tire pressure, blade condition
Every 25 hours	Change oil, clean air filter, inspect spark plug
Every season	Sharpen/replace blade, lubricate wheels
Storage	Drain fuel or add stabilizer, clean deck

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

Storage

Prepare mower for off-season storage to prevent damage.

Clean deck thoroughly to remove grass and debris.
Drain fuel or add fuel stabilizer and run engine 5 minutes.
Change oil if due.
Remove spark plug, add 1 tsp oil, pull starter slowly, reinstall plug.
Store in dry, covered area.

CAUTION! Never store with fuel in tank untreated; gasoline can degrade and damage engine.

Warranty Information

Craftsman M110 includes a 2-year limited warranty covering defects in materials/workmanship. Proof of purchase required. Warranty does not cover normal wear, misuse, or lack of maintenance. For warranty service, contact Craftsman at 1-888-331-4569 or visit www.craftsman.com. Keep this manual and receipt for reference.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged filter	Check fuel level; use fresh gas; clean/replace air filter.
Poor cutting performance	Dull blade, low engine speed	Sharpen/replace blade; check throttle setting.
Vibration/excessive noise	Loose blade, debris in deck	Tighten blade bolt; clean deck interior.
Won't drive	Drive cable loose, wheels obstructed	Adjust drive cable; check for debris around axles.
Engine smokes	Overfilled oil, dirty air filter	Drain excess oil; clean/replace air filter.

Service: For repairs not covered here, contact authorized service center: 1-888-331-4569.