The Craftsman M230 is a 21-inch push lawn mower featuring a 140cc Briggs & Stratton engine, 3-in-1 mulching/bagging/side-discharge capability, single-lever height adjustment, and durable steel deck. This manual provides comprehensive parts identification, maintenance procedures, troubleshooting, and safety information to ensure optimal performance and longevity of your mower.
Key components of the Craftsman M230 lawn mower for reference during assembly, maintenance, and parts ordering.
| Part Name | Description |
|---|---|
| Engine (140cc) | Briggs & Stratton 675 Series, OHV |
| Deck | 21-inch stamped steel, corrosion-resistant |
| Blade | 21-inch mulching blade, 3-point star center |
| Height Adjustment Lever | Single-lever, 6 positions (1.25-3.75 inches) |
| Drive Control Bar | Engages self-propelled drive system |
| Rear Bag | 2.1 bushel capacity, fabric with handle |
| Wheels | 8-inch rear, 7-inch front |
| Starter Handle | Recoil start with rope |
| Oil Fill Cap/Dipstick | For engine oil check and fill |
| Fuel Tank | 1.1-quart capacity, located on engine |
Critical safety precautions to prevent injury during operation and maintenance.
WARNING! Gasoline is flammable. Refuel outdoors only when engine is cool. Do not smoke near fuel.
Regular maintenance ensures reliable operation and extends mower life.
CAUTION! Always disconnect spark plug before inspecting or replacing blade.
The 21-inch steel deck houses the cutting blade and supports mulching, bagging, and side-discharge functions.
Blade Removal: Disconnect spark plug. Tip mower on side (carburetor up). Use block of wood to secure blade, then remove center bolt (usually 5/8" or 15/16").
Blade Sharpening: Maintain original cutting angle. Balance blade before reinstallation (use blade balancer).
Deck Cleaning: After use, hose out clippings from underside. Allow to dry to prevent rust.
The M230 features a front-wheel drive system engaged by the drive control bar.
Tip: If drive does not engage, check belt tension and for debris around drive wheels.
Primary controls located on handle for easy operation.
WARNING! Keep hands and feet away from discharge chute during operation.
Proper storage prevents fuel system issues and corrosion.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | No fuel, old gas, clogged filter, bad spark plug | Check fuel level, replace fuel if stale, clean/replace air filter, check spark plug. |
| Engine runs poorly | Dirty air filter, water in fuel, clogged carburetor | Replace air filter, drain fuel tank, clean carburetor. |
| Uneven cutting | Dull blade, uneven tire pressure, bent blade | Sharpen or replace blade, check tire pressure, inspect blade for damage. |
| Vibration | Unbalanced blade, loose blade bolt, debris on blade | Balance or replace blade, tighten blade bolt, clean blade and deck. |
| Drive not engaging | Worn drive belt, debris in drive wheels | Inspect and replace belt if needed, clean around drive wheels. |
Refer to the official Craftsman parts diagram (Model 917.376xxx) for exact part numbers. Common replacement parts:
Order parts through Sears PartsDirect or authorized Craftsman service centers.
Craftsman M230 lawn mowers are backed by a limited warranty. Residential use: 2-year full warranty on mower, 2-year limited warranty on engine. Proof of purchase required. Warranty does not cover normal wear items (blades, belts, filters), damage from misuse, lack of maintenance, or commercial use. For warranty service, contact Craftsman Customer Care at 1-888-331-4569 or visit www.craftsman.com.