Murray C3812-010 Lawn Mower Manual

The Murray C3812-010 is a 12.5 HP, 38-inch cut rear-engine riding lawn mower designed for residential use. It features a Briggs & Stratton engine, 6-speed manual transmission, electric start, adjustable cutting height, mulching capability, and a 2.5-gallon fuel tank. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 12.5 HP Briggs & Stratton engine, 38-inch cutting deck, 6-speed transmission, Electric start key, Height adjustment lever, Mulching plug, Grass bag attachment point.

Assembly Instructions

Unpack and inspect all parts. Assembly requires basic tools.

1. Attach steering wheel: Align and tighten bolt.
2. Install seat: Place on mounts and secure with provided pins.
3. Attach cutting deck: Align with mounting points and secure belts.
4. Connect battery: For electric start models, connect positive then negative terminals.
5. Add engine oil and fuel: Use SAE 30 oil and unleaded gasoline.

WARNING! Mower is heavy; use assistance. Ensure all bolts are tightened securely.

First-Time Operation

Before first use, complete pre-operation checks.

1. Check oil level: Ensure dipstick shows full.
2. Add fuel: Fill tank with fresh unleaded gasoline.
3. Adjust cutting height: Set lever to desired position.
4. Start engine: Insert key, set choke, turn to START.
5. Engage blades: Pull deck engagement lever slowly.

CAUTION! Operate only in clear, dry conditions. Keep hands and feet away from moving parts.

Specifications

• Engine: 12.5 HP Briggs & Stratton OHV.
• Cutting Width: 38 inches.
• Transmission: 6-speed manual.
• Fuel Capacity: 2.5 gallons.
• Cutting Height Range: 1.5 to 4 inches.
• Drive System: Rear-wheel drive.
• Starting: Electric key with recoil backup.
• Weight: Approx. 450 lbs.
• Warranty: 2-year limited residential.

Controls and Settings

Operator controls located on dash and steering column.

Dashboard: Ignition key, Throttle control, Choke, Headlight switch.

Steering Column: Gear shift lever (1-6), Blade engagement lever, Parking brake lever, Height adjustment lever.

Operation: Set throttle to FAST for mowing. Use gear 1-2 for thick grass, 3-6 for transport. Engage blades only when engine is at full throttle. Adjust cutting height before starting mower.

Attaching Accessories

Supports mulching kit and grass bag.

1. Turn off engine and remove key.
2. For mulching: Install mulching plug over discharge chute.
3. For bagging: Attach grass bag to rear brackets.
4. Ensure all attachments are secure before operation.

Tip: Always disconnect spark plug wire before attaching accessories.

Mowing Operation

For best results, mow when grass is dry.

1. Start engine: Set parking brake, engage choke, turn key.
2. Select gear: Release brake, select appropriate speed.
3. Engage blades: Pull lever slowly to engage cutting deck.
4. Mow in overlapping passes: For even cut.
5. Shut down: Disengage blades, set throttle to low, turn key off.
6. Empty bag: When full, stop engine and empty grass bag.

WARNING! Never mow on slopes greater than 15 degrees. Watch for obstacles.

Safety Features

Blade brake clutch: Stops blades when engagement lever is released. Seat safety switch: Engine stops if operator leaves seat with blades engaged. Parking brake: Must be set to start engine.

Care & Maintenance

Regular maintenance ensures long life.

• After each use: Clean deck, check for debris.
• Every 25 hours: Change engine oil, check air filter.
• Every season: Sharpen blades, check spark plug, lubricate moving parts.
• Storage: Drain fuel or add stabilizer, store in dry place.

CAUTION! Always disconnect spark plug before performing maintenance.

Regulatory Information

EPA Certified: Engine meets emission standards. ANSI/OPEI B71.1: Complies with safety standards for ride-on mowers. Copyright © Murray LLC. For support, visit www.murray.com or contact 1-800-269-6215.

Troubleshooting

Service: 1-800-269-6215; www.murray.com