Toro Model 20037 Owners Manual

The Toro Model 20037 is a high-performance walk-behind lawn mower featuring a powerful engine, adjustable cutting heights, mulching capability, rear bagging system, and easy-start technology. Designed for residential use with durable steel deck, ergonomic handle, and safety features including blade brake clutch. 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. Attachments and Accessories 7. Cutting and Mulching 8. Safety Features 9. Maintenance & Storage 10. Warranty Information 11. Troubleshooting

Features at a Glance

Key components: Steel cutting deck, Briggs & Stratton engine, height adjustment lever, rear collection bag, mulching plug, ergonomic handle with controls.

Feature	Description
Cutting Width	21-inch steel deck for efficient mowing
Engine	Briggs & Stratton 140cc OHV engine with easy-start
Cutting Heights	6-position adjustment (1.5" to 4")
Drive System	Single-speed rear-wheel drive
Collection System	Rear bag with easy-empty feature
Mulching Capability	Includes mulching plug for nutrient recycling
Handle	Ergonomic design with fold-down capability
Safety Features	Blade brake clutch system, operator presence control
Wheels	10-inch rear, 8-inch front wheels
Weight	65 lbs (without bag)

Assembly Instructions

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

Attach handle: Align handle brackets with deck mounts, secure with provided bolts.
Install wheels: Insert axles through deck brackets, secure with washers and nuts.
Attach grass bag: Hook bag frame onto rear deck brackets, ensure secure latch.
Install mulching plug: Insert into rear discharge opening when mulching.
Add engine oil: Use SAE 30 detergent oil (check dipstick for proper level).
Add gasoline: Use fresh unleaded gasoline (87 octane minimum).

WARNING! Keep hands and feet clear of cutting blade during assembly. Ensure all bolts are tightened securely.

First-Time Operation

Complete assembly and pre-operation checks before starting.

Check oil level: Ensure oil is at full mark on dipstick.
Add fuel: Fill tank with fresh unleaded gasoline.
Adjust cutting height: Set lever to desired position (middle setting recommended).
Start engine: Set throttle to FAST, pull starter cord firmly.
Engage blade: With engine running, squeeze operator presence control lever to handle.
Begin mowing: Walk at steady pace, overlapping passes slightly.

CAUTION! Clear mowing area of debris. Wear protective footwear and eye protection.

Specifications

Model: 20037 Walk-Behind Mower
Cutting Width: 21 inches
Engine: Briggs & Stratton 140cc OHV
Fuel Capacity: 1.0 gallon
Oil Capacity: 20 oz (SAE 30)
Cutting Heights: 1.5" to 4" (6 positions)
Drive: Single-speed rear-wheel
Collection Bag Capacity: 2.5 bushels
Warranty: 2-year limited residential
Weight: 65 lbs

Controls and Settings

Handle controls: Operator presence lever, drive control lever, height adjustment lever.

Engine Controls: Throttle (FAST/SLOW/STOP), choke, primer bulb, recoil starter.

Cutting Height Adjustment: Lever with 6 positions (1.5", 2", 2.5", 3", 3.5", 4"). Drive Control: Squeeze lever to engage drive wheels. Bagging/Mulching: Remove bag for mulching; install bag for collection; use plug for full mulching.

Attachments and Accessories

Available accessories: Mulching kit (included), bagging kit (included), side discharge chute (optional), wheel weights (optional).

Mulching: Install mulching plug in rear discharge opening.
Bagging: Attach collection bag to rear brackets.
Side Discharge: Remove mulching plug, install side discharge chute (sold separately).

Tip: Always stop engine and disconnect spark plug before changing attachments.

Cutting and Mulching

Supports bagging, mulching, and side discharge operations.

Bagging: Install collection bag, mow normally, empty when full.
Mulching: Install mulching plug, mow at slower pace for finer clippings.
Height Adjustment: Change based on grass type and season.
Overlap: Overlap each pass by 2-3 inches for even cutting.
Slopes: Mow across slopes, not up and down.
Wet Grass: Avoid mowing when grass is wet to prevent clogging.

WARNING! Never remove grass bag or unclog chute with engine running. Always stop engine first.

Safety Features

Blade Brake Clutch: Stops blade within 3 seconds when control lever released. Operator Presence Control: Engine stops if operator leaves position. Safety Labels: Read and understand all warning labels on mower.

Maintenance & Storage

Regular maintenance ensures optimal performance and longevity.

After each use: Clean underside of deck, check for damage.
Monthly: Check blade sharpness and balance, sharpen if needed.
Seasonally: Change oil, replace air filter, check spark plug.
Storage: Drain fuel or add stabilizer, clean thoroughly, store in dry place.

CAUTION! Always disconnect spark plug before performing maintenance. Use only Toro replacement parts.

Warranty Information

2-year limited warranty for residential use. Warranty covers defects in materials and workmanship. Not covered: Normal wear, misuse, commercial use, improper maintenance. For warranty service, contact authorized Toro dealer with proof of purchase. For support, visit www.toro.com or contact 1-800-348-2424.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, safety switch	Check fuel level; ensure spark plug connected; check safety control lever.
Poor cutting performance	Dull blade, engine speed	Sharpen or replace blade; set throttle to FAST position.
Uneven cutting	Deck level, tire pressure	Level cutting deck; ensure tires properly inflated.
Excessive vibration	Loose blade, debris	Tighten blade bolt; clean deck of debris.
Bag not filling	Wet grass, clogged chute	Mow when grass dry; clean discharge chute.

Service: Contact authorized Toro dealer for repairs. Use genuine Toro parts.

Support: 1-800-348-2424; www.toro.com