The Murray 866086-00 is a walk-behind, gas-powered lawn mower featuring a Briggs & Stratton engine, 21-inch steel cutting deck, single-lever height adjustment (6 positions), 2-in-1 side discharge/mulching capability, rear bagger, easy-start system, and durable steel construction. Below are key sections for safety, features, assembly, operation, maintenance, troubleshooting, and specifications.
Key components: Briggs & Stratton engine, 21-inch steel deck, height adjustment lever, rear grass bag, mulching plug, discharge chute, recoil starter, and fuel tank.
| Feature | Description |
|---|---|
| Engine | Briggs & Stratton 125cc gas engine with easy-start technology |
| Cutting Width | 21-inch steel cutting deck |
| Cutting Options | 2-in-1: Side discharge or mulching (plug included) |
| Height Adjustment | Single-lever, 6 positions (1.5" to 3.75") |
| Grass Bag | Rear-mounted, 2.1 bushel capacity |
| Drive System | Push-powered (non-self-propelled) |
| Starter | Recoil pull-start mechanism |
| Fuel Tank | 0.5-gallon capacity |
| Wheels | 8-inch rear, 7-inch front plastic wheels |
| Deck Material | Rust-resistant painted steel |
Unpack and inspect all parts. Assembly requires basic tools (included).
WARNING! Do not attempt to start engine before adding oil and fuel. Keep hands clear of cutting blade during assembly.
Always operate mower with caution to prevent injury.
CAUTION! The blade rotates at high speed. Keep hands and feet away from deck at all times.
Handle includes recoil starter grip, operator presence control (bail), and height adjustment lever.
Starting: 1. Check oil and fuel. 2. Prime engine (if equipped). 3. Set throttle to FAST. 4. Pull recoil starter firmly.
Stopping: Release operator presence control (bail) to stop blade. Move throttle to STOP to stop engine.
Mowing: Engage bail to start blade, walk at steady pace, overlap passes slightly for even cut.
Single lever adjusts all four wheels simultaneously.
Tip: For first mow of season, set to highest setting, then gradually lower.
| Interval | Task |
|---|---|
| Before each use | Check oil level, inspect blade for damage, clear deck of debris |
| Every 25 hours | Change engine oil (or annually) |
| Every season | Replace air filter, spark plug |
| As needed | Sharpen or replace blade, check tire pressure |
| After each use | Clean underside of deck, wipe down mower |
WARNING! Always disconnect spark plug wire before performing any maintenance.
Refer to Briggs & Stratton manual for detailed engine maintenance.
Prepare mower for off-season storage to prevent damage.
CAUTION! Never store mower with fuel in tank indoors or near open flame.
Murray 866086-00 comes with a 2-year limited warranty covering defects in materials and workmanship under normal residential use. Warranty does not cover wear items (blade, belts, etc.), damage from misuse, lack of maintenance, or commercial use. To make a warranty claim, contact Murray customer service at 1-800-269-6215 or visit www.murray.com. Keep original receipt as proof of purchase.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | No fuel, old gas, clogged filter, bad spark plug | Check fuel; use fresh gas; clean/replace air filter; check spark plug. |
| Engine runs poorly | Dirty air filter, old gas, clogged carburetor | Clean/replace air filter; drain old gas; clean carburetor. |
| Uneven cutting | Dull blade, uneven tire pressure, deck clogged | Sharpen/replace blade; check tire pressure; clean deck. |
| Excessive vibration | Loose blade, bent blade, debris in deck | Tighten blade bolt; replace bent blade; clean deck. |
| Grass not discharging | Wet grass, deck clogged, engine speed too low | Mow when dry; clean deck; run engine at FAST setting. |
| Wheels not turning freely | Debris in axles, over-tightened nuts | Clean axles; adjust wheel nuts. |
Service: For engine issues, contact Briggs & Stratton at 1-800-233-3723. For mower issues, contact Murray at 1-800-269-6215 or visit www.murray.com.