Murray SPRINT Lawn Mower Manual

The Murray SPRINT Lawn Mower is a reliable, self-propelled walk-behind mower designed for efficient residential lawn care. It features a Briggs & Stratton engine, 21-inch steel cutting deck, single-lever height adjustment, 2-in-1 mulching/bagging capability, rear-wheel drive, and easy-start system. Below are key sections for safety, features, assembly, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Assembly Instructions 3. Safety Precautions 4. Specifications 5. Controls and Operation 6. Cutting Height Adjustment 7. Maintenance Schedule 8. Storage Guidelines 9. Warranty Information 10. Troubleshooting

Features at a Glance

Key components: Briggs & Stratton engine, 21-inch steel deck, rear bagger, single-lever height adjustment, self-propelled drive system, and mulching plug.

Feature	Description
Engine	Briggs & Stratton 140cc OHV engine with easy-start system
Cutting Width	21-inch steel cutting deck
Cutting Options	2-in-1 mulch/bag capability (bagger included)
Height Adjustment	Single-lever, 6-position (1.5-3.75 inches)
Drive System	Self-propelled rear-wheel drive with speed control
Starter	Recoil starter with primer bulb
Wheels	8-inch rear, 7-inch front wheels
Handle	Foldable, padded handle with controls
Fuel Tank	1-quart capacity
Weight	Approximately 65 lbs

Assembly Instructions

Unpack all parts and inspect for damage. Assembly requires basic tools (included).

Attach handle: Align handle brackets with deck mounts, secure with bolts and wing nuts.
Install bagger: Attach bagger frame to rear deck hooks, secure bag with clips.
Attach mulching plug: Insert plug into rear discharge chute if mulching.
Add engine oil: Fill with SAE 30 detergent oil (check dipstick).
Add fuel: Use fresh unleaded gasoline (87 octane minimum).

WARNING! Do not add fuel or oil while engine is hot. Ensure all fasteners are tight.

Safety Precautions

Always follow safety guidelines to prevent injury.

Wear protective gear: Safety glasses, long pants, sturdy shoes.
Clear mowing area: Remove stones, toys, debris before mowing.
Never mow wet grass: Increases slip risk and clogs deck.
Keep hands/feet away: From rotating blades and discharge chute.
Stop engine: Before unclogging, adjusting, or leaving mower unattended.
Children/pets: Keep at a safe distance during operation.

CAUTION! Gasoline is flammable; store in approved container away from heat.

Specifications

Model: Murray SPRINT 21-inch Self-Propelled
Engine: Briggs & Stratton 140cc, 4-cycle OHV
Cutting Width: 21 inches
Cutting Height: 1.5 to 3.75 inches (6 positions)
Drive: Self-propelled rear-wheel drive
Speed Control: Variable speed lever on handle
Bag Capacity: 2.0 bushels
Fuel Type: Unleaded gasoline (87 octane minimum)
Oil Type: SAE 30 detergent oil (20 oz capacity)
Warranty: 2-year limited warranty

Controls and Operation

Handle controls: Drive control lever, speed control, blade control bail, and recoil starter.

Starting: 1. Push primer bulb 3 times. 2. Set throttle to FAST. 3. Pull recoil starter firmly.

Self-Propelled Operation: Squeeze drive control lever to handle to engage wheels; adjust speed with lever.

Stopping: Release blade control bail to stop blade; release drive lever to stop movement. Move throttle to STOP.

Bagging/Mulching: Install bag for collection; insert mulching plug for fine clippings (remove bag).

Cutting Height Adjustment

Use single lever to adjust all wheels simultaneously.

Stop engine and wait for blades to stop.
Pull lever outward and move to desired height setting (1-6).
Release lever to lock position.
Test on small area before full mowing.

Tip: For first mow of season, set to highest setting; gradually lower for subsequent mows.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Interval	Task
Before each use	Check oil level; inspect for loose parts; clear deck of debris
Every 25 hours	Change engine oil; check air filter; sharpen blade
Every 50 hours	Replace spark plug; clean under deck; check drive belt
Season end	Drain fuel or add stabilizer; clean thoroughly; store properly

Blade Sharpening: Remove blade with wrench; sharpen at 30-degree angle; balance before reinstalling.

Storage Guidelines

Prepare mower for off-season storage to prevent damage.

Drain fuel: Run engine until tank is empty, or add fuel stabilizer.
Change oil: Replace with fresh oil to remove contaminants.
Clean: Remove grass clippings from deck, wheels, and engine.
Remove spark plug: Add 1 tablespoon oil into cylinder; pull starter slowly.
Store: In dry, covered area; cover mower to prevent dust.

CAUTION! Never store with fuel in tank without stabilizer; gasoline degrades over time.

Warranty Information

Murray SPRINT mowers come with a 2-year limited warranty covering defects in materials/workmanship. Warranty does not cover normal wear, misuse, or lack of maintenance. Proof of purchase required. For warranty service, contact authorized Murray service center or call 1-800-800-7310. Visit www.murray.com for details.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged air filter	Add fresh fuel; clean/replace air filter; check spark plug.
Poor cutting performance	Dull blade, low engine speed	Sharpen/replace blade; set throttle to FAST; clear deck.
Self-propelled not working	Drive belt loose, control cable	Check belt tension; adjust drive control cable.
Excessive vibration	Unbalanced blade, loose parts	Balance or replace blade; tighten all bolts/nuts.
Engine runs but dies	Dirty carburetor, clogged fuel line	Clean carburetor; replace fuel filter; use fresh gas.

Reset: For safety switch issues, ensure blade control bail is fully engaged.

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