Installation Guide
Tools Needed:
- Adjustable wrench
- Screwdrivers (flat and Phillips)
- Pliers
- Socket set
- Safety gloves and goggles
Step-by-Step Assembly
- Unpack and Inspect: Remove all packaging materials and check for any shipping damage or missing parts.
- Handle Assembly: Attach the upper and lower handle sections using provided bolts and hardware.
- Install Wheels: Attach all four wheels to the axle using the provided washers and cotter pins.
- Height Adjustment: Set the cutting height to your preferred level using the height adjustment lever.
- Engine/Electrical Setup: For gas models: add oil and fuel. For electric models: ensure proper battery installation.
- Safety Features Check: Verify that all safety switches and blade control systems are functioning properly.
- Test Run: Start the mower in a clear area to ensure proper operation before first use.
Specifications
| Model Series | CMXGRAM1130037 |
| Type | Self-Propelled Gas Lawn Mower |
| Engine Type | Briggs & Stratton 163cc OHV |
| Cutting Width | 21 inches |
| Cutting Height Range | 1.25 - 3.75 inches |
| Drive System | Single-Speed Front Wheel Drive |
| Fuel Capacity | 1.5 quarts |
| Oil Capacity | 20 oz |
| Weight | 75 lbs |
| Wheel Size | 8 inches (front), 10 inches (rear) |
| Mulching Capability | Yes (with included kit) |
| Bag Capacity | 2.5 bushels |
Warranty Information
- Full Warranty: 3 years limited warranty
- Engine Warranty: 2 years on Briggs & Stratton engine
- Additional Coverage: Optional extended warranty available
For warranty service, contact Craftsman Customer Service at 1-888-331-4569 or visit Craftsman.com
Key Features
Briggs & Stratton Engine
Reliable 163cc OHV engine provides consistent power and performance with easy starting technology and reduced emissions.
Single Lever Height Adjustment
Quickly adjust all four wheels simultaneously with one lever, allowing for precise cutting height selection from 1.25 to 3.75 inches.
3-in-1 Capability
Mulch, bag, or side discharge with easy conversion. The versatile deck design allows for optimal grass management in any condition.
Self-Propelled Drive
Front-wheel drive system provides excellent traction and maneuverability, reducing operator fatigue on slopes and uneven terrain.
Durable Steel Deck
21-inch reinforced steel cutting deck provides durability and optimal airflow for superior cutting performance and grass dispersal.
Easy Fold Handle
Quick-release levers allow the handle to fold down for compact storage, saving valuable space in your garage or shed.
Cutting Systems Explained
Mulching
Finely cuts grass clippings and returns them to the lawn as natural fertilizer
Bagging
Collects clippings in 2.5 bushel bag for clean lawn appearance
Side Discharge
Ejects clippings to the side for quick cutting in tall or wet grass
Variable Speed
Adjustable drive speed to match your walking pace and terrain
Easy Start
Primer bulb and auto-choke system for reliable starting
Wash Port
Built-in deck wash connection for easy cleaning after use
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Engine won't start | Empty fuel tank, stale gas, spark plug issue | Check fuel level, use fresh gasoline, inspect spark plug |
| Poor cutting performance | Dull blade, wrong cutting height, clogged deck | Sharpen or replace blade, adjust height, clean deck |
| Uneven cutting | Uneven tire pressure, bent blade, uneven deck | Check tire pressure, inspect blade, level mower deck |
| Excessive vibration | Unbalanced blade, loose components, bent crankshaft | Balance blade, tighten bolts, inspect crankshaft |
| Self-propel not working | Drive belt loose or broken, drive cable adjustment | Check drive belt tension, adjust drive cable |
| Engine stalls during operation | Clogged air filter, fuel flow issue, overheating | Clean air filter, check fuel lines, allow engine to cool |
Maintenance Schedule
- Before each use: Check oil level, tire pressure, and blade condition
- Every 25 hours: Change oil, clean air filter, check spark plug
- Every 50 hours: Sharpen blade, check drive belt, lubricate wheels
- Season end: Drain fuel or add stabilizer, clean entire mower
- Season start: Change oil, install fresh fuel, test operation
- Annual: Replace air filter, spark plug, check all safety features
Manual Downloads
Current Model Manuals
CMXGRAM1130037
21" Self-Propelled Gas Mower
CMEMG2120037
21" Electric Push Mower
CMXGRAM1150037
21" High Wheel Gas Mower
CMEMB2120037
21" Battery Push Mower
Popular Previous Models
37411
21" Classic Gas Mower
37711
22" Rear Bag Mower
37911
21" Electric Start Mower
38111
22" High Wheel Mower