Murray 7800203 Lawn Mower Manual

The Murray 7800203 is a 20-inch push lawn mower featuring a Briggs & Stratton 125cc engine, 3-in-1 mulching/bagging/side-discharge capability, single-lever height adjustment (1-4 inches), durable steel deck, easy-start system, and rear-bagging collection system. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly Instructions 3. First-Time Operation 4. Specifications 5. Controls and Settings 6. Connecting Attachments 7. Mowing Operations 8. Safety Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Briggs & Stratton 125cc engine, 20-inch steel cutting deck, 3-in-1 system, rear bag, single-lever height adjuster, push handle.

Feature	Description
Engine	Briggs & Stratton 125cc, 4-cycle, easy-start system
Cutting Width	20 inches
Cutting Deck	Durable steel construction
Cutting Options	3-in-1: Mulch, Bag, Side Discharge
Height Adjustment	Single-lever, 4 positions (1-4 inches)
Collection System	Rear bag with easy-empty feature
Wheels	8-inch rear, 7-inch front
Handle	Foldable push handle with comfort grip
Fuel Tank	0.5-gallon capacity
Oil Type	SAE 30 (summer) or 10W-30 (multi-season)

Assembly Instructions

Unpack and inspect all parts. Assemble on a flat, stable surface.

Attach handle: Align lower handle sections with deck brackets; secure with provided bolts and wing nuts.
Install upper handle: Connect upper handle to lower sections; secure with bolts.
Attach rear bag: Hang bag support brackets on deck hooks; attach collection bag.
Install side-discharge chute (if not pre-installed): Snap into place on deck opening.
Check wheels: Ensure all wheels are securely attached and rotate freely.

WARNING! Wear gloves during assembly. Ensure all fasteners are tight before operation.

First-Time Operation

Before starting, perform initial setup and safety checks.

Add oil: Fill engine with SAE 30 or 10W-30 oil to full mark on dipstick.
Add fuel: Use fresh unleaded gasoline (87 octane minimum). Do not overfill.
Check cutting height: Adjust lever to desired setting (recommend 2.5-3 inches for first mow).
Start engine: Set throttle to FAST, prime 3 times, pull starter cord firmly.
Engage blade: With engine running, pull blade control lever to handle.

CAUTION! Never add fuel while engine is hot. Clear mowing area of debris.

Specifications

Model: Murray 7800203
Engine: Briggs & Stratton 125cc, 4-cycle
Cutting Width: 20 inches
Cutting Height: 1 to 4 inches (4 positions)
Deck Material: Steel
Wheels: 8-inch rear, 7-inch front
Collection Bag Capacity: 1.8 bushels
Fuel Capacity: 0.5 gallons
Oil Capacity: 20 oz (0.6 liters)
Weight: 55 lbs (assembled)

Controls and Settings

Handle Controls: Blade control lever, throttle control, height adjustment lever.

Blade Control Lever: Must be held against handle to keep blade engaged (deadman switch).

Throttle Control: FAST for mowing, SLOW for idling, STOP to shut off engine.

Height Adjustment: Single lever adjusts all four wheels simultaneously (positions 1-4).

3-in-1 System Selector: Install mulch plug for mulching, bag for collection, or chute for side discharge.

Connecting Attachments

Mulch Plug: Insert into rear discharge opening. Bag: Attach brackets to deck hooks. Side-Discharge Chute: Snap onto right-side opening.

Stop engine and wait for blade to completely stop.
Select desired function and install appropriate attachment.
Ensure attachment is securely locked in place before operation.

Tip: Always disconnect spark plug wire before changing attachments.

Mowing Operations

Supports standard mowing, mulching, and bagging operations.

Starting: Prime engine, set throttle to FAST, pull starter cord.
Mowing: Walk at steady pace, overlapping passes by 2-3 inches.
Height Adjustment: Adjust based on grass type and season.
Bag Emptying: Stop engine, remove bag, empty clippings.
Mulching: Install mulch plug; mow when grass is dry.
Side Discharge: Install chute for cutting tall or wet grass.
Shut Down: Release blade control, set throttle to STOP.

WARNING! Never operate without proper attachment installed. Keep hands and feet away from discharge area.

Safety Features

Blade Control Safety: Blade stops within 3 seconds of releasing lever. Engine Kill Switch: Stops engine when blade control is released. Safety Labels: Read and understand all warning labels on mower.

Care & Maintenance

Regular maintenance ensures optimal performance and longevity.

After each use: Clean underside of deck, check for damage.
Weekly: Check oil level, inspect air filter, tighten fasteners.
Monthly: Sharpen or replace blade, check spark plug.
Seasonal: Change oil, clean/replace air filter, stabilize fuel.

CAUTION! Always disconnect spark plug before maintenance. Store in dry place.

Regulatory Information

EPA Certified: Meets emission standards for small engines. CARB Compliant: Approved for use in California. Safety Standards: Complies with ANSI B71.1-2017. Copyright © Murray LLC. For support, visit www.murray.com or contact 1-800-800-7310.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged filter	Add fresh fuel, check fuel line, clean/replace air filter.
Poor cutting performance	Dull blade, low engine speed	Sharpen/replace blade, set throttle to FAST, clear deck.
Uneven cut	Uneven tire pressure, wrong height	Check tire pressure, adjust cutting height evenly.
Excessive vibration	Loose blade, damaged deck	Tighten blade bolt, inspect deck for damage.
Bag not filling	Wet grass, clogged chute	Mow when grass is dry, clear discharge chute.

Storage: Drain fuel or add stabilizer for off-season storage.

Service: 1-800-800-7310; www.murray.com