Craftsman R110 Lawn Mower Parts Manual

The Craftsman R110 is a 21-inch push lawn mower powered by a 140cc Briggs & Stratton engine, featuring a 3-in-1 discharge system (mulch, bag, side discharge), 6-position cutting height adjustment, and a durable steel deck. This manual provides comprehensive parts identification, replacement procedures, maintenance schedules, and safety guidelines to ensure optimal performance and longevity of your mower.

1. Parts Identification & Diagram 2. Engine Components 3. Deck & Cutting System 4. Controls & Handle Assembly 5. Wheels & Drive System 6. Maintenance Schedule 7. Replacement Procedures 8. Safety Precautions 9. Troubleshooting 10. Specifications 11. Warranty & Support

Parts Identification & Diagram

Key assemblies: Engine, Cutting Deck, Handle, Wheels, Drive System, Bagging/Mulching Kit.

Part Number	Description	Qty
CMXGRAM1130047	Blade, 21-inch Mulching	1
CMXGRAM1130055	Drive Belt	1
CMXGRAM1130063	Air Filter	1
CMXGRAM1130071	Spark Plug (RC12YC)	1
CMXGRAM1130089	Oil Drain Plug	1
CMXGRAM1130097	Wheel Assembly (Rear)	2
CMXGRAM1130105	Height Adjustment Lever	1
CMXGRAM1130113	Drive Control Cable	1
CMXGRAM1130121	Deck Wash Port Plug	1
CMXGRAM1130139	Grass Bag Assembly	1

Engine Components

140cc Briggs & Stratton 450E Series engine with overhead valve (OHV) design.

Air Filter: Paper element; replace every 25 hours or season.
Spark Plug: Champion RC12YC; gap 0.030 inch; replace annually.
Oil Fill/Drain: SAE 30 detergent oil (20 oz capacity); change every 50 hours or season.
Fuel System: Carburetor with primer bulb; use unleaded gasoline only.
Muffler & Exhaust: Heat shield and spark arrestor (if equipped).

WARNING! Disconnect spark plug wire before servicing engine. Allow engine to cool.

Deck & Cutting System

21-inch stamped steel deck with single blade and 6-position height adjustment (1.25-3.75 inches).

Blade: Mulching blade (part CMXGRAM1130047); sharpen or replace if damaged.
Blade Adapter & Bolt: Retains blade; torque to 450-600 in-lb.
Deck Wash Port: Connect garden hose to clean underside.
Discharge Chute: For side discharge; removable for mulching.
Height Adjustment Lever: Single lever adjusts all four wheels.

CAUTION! Ensure blade stops rotating before inspecting or replacing.

Controls & Handle Assembly

Handle with drive control bail, safety start lever, and height adjustment.

Component	Function
Drive Control Bail	Engages drive to wheels; release to stop.
Safety Start Lever	Must be held against handle to start engine.
Height Adjustment Lever	Sets cutting height (1-6 positions).
Handle Knobs	Adjust handle height; wingnut style.
Bag Indicator	Flag indicates when bag is full.

Wheels & Drive System

Rear-wheel drive with 8-inch rear and 7-inch front wheels.

Drive Belt: Connects engine pulley to transmission; inspect for wear/cracks.
Drive Control Cable: Links bail to transmission; adjust if drive slips.
Wheel Assembly: Plastic hub with ball bearings; replace if wobbly.
Axles & Bushings: Steel axles with nylon bushings; lubricate annually.

Tip: Check tire pressure (20 PSI max) for even cutting.

Maintenance Schedule

Before Each Use: Check oil level; inspect blade for damage; clear deck of debris.
Every 25 Hours/Season: Replace air filter; check spark plug; lubricate axles.
Every 50 Hours/Season: Change oil; inspect drive belt; sharpen/replace blade.
Storage: Drain fuel or add stabilizer; clean deck; store in dry place.

Replacement Procedures

Blade Replacement:

Disconnect spark plug wire.
Tip mower on side (air filter up).
Use block to secure blade; remove bolt (left-hand thread).
Install new blade with stamped side toward deck.
Torque bolt to 450-600 in-lb.

Drive Belt Replacement:

Remove deck (4 bolts).
Release belt tension; remove old belt from pulleys.
Route new belt per diagram; reassemble.
Adjust drive control cable for proper tension.

Safety Precautions

Always wear eye protection and sturdy shoes. Keep hands and feet away from moving parts. Do not mow on slopes greater than 15 degrees. Never remove safety devices. Stop engine before unclogging or adjusting.

DANGER! Gasoline is flammable; refuel outdoors with engine off and cool.

Troubleshooting

Problem	Possible Cause	Solution
Engine won't start	Empty fuel tank; old gasoline; clogged air filter; faulty spark plug	Add fresh fuel; replace filter/spark plug; check oil level.
Poor cutting performance	Dull blade; low engine speed; clogged deck	Sharpen/replace blade; set throttle to FAST; clean deck.
Mower vibrates excessively	Unbalanced/damaged blade; loose blade bolt	Replace blade; tighten bolt to specification.
Drive does not engage	Loose drive cable; worn belt; low tire pressure	Adjust cable; replace belt; inflate tires.
Grass bags poorly	Wet grass; full bag; high cutting height	Mow when dry; empty bag; lower cutting height.

Specifications

Model: Craftsman R110
Engine: Briggs & Stratton 140cc OHV
Cutting Width: 21 inches
Cutting Heights: 6 positions (1.25-3.75 in)
Deck Material: Stamped steel
Discharge Options: Mulch, Bag, Side discharge
Wheels: 8-inch rear, 7-inch front
Weight: 65 lbs (approx.)
Oil Capacity: 20 oz SAE 30
Fuel Capacity: 1.0 gallon

Warranty & Support

Craftsman R110 mowers are backed by a 2-year limited warranty covering defects in materials/workmanship. Warranty does not cover normal wear, misuse, or lack of maintenance. For parts ordering, technical support, or to locate a service center, visit www.craftsman.com or call 1-888-331-4569. Always have model number (CMXGRAM1130000) and serial number ready when contacting support.