Toro Model 20339 Owner's Manual

The Toro Model 20339 is a high-performance walk-behind lawn mower featuring a powerful engine, durable steel deck, adjustable cutting heights, easy-start system, mulching/bagging/side-discharge capabilities, ergonomic handle with controls, and a robust rear-wheel drive system. Below are key sections for safety, features, assembly, operation, maintenance, troubleshooting, and warranty.

1. Features at a Glance 2. Assembly Instructions 3. Safety Information 4. Specifications 5. Controls and Operation 6. Cutting Height Adjustment 7. Maintenance Schedule 8. Storage Guidelines 9. Warranty Information 10. Regulatory Compliance 11. Troubleshooting

Features at a Glance

Key components: Steel cutting deck, Briggs & Stratton engine, Rear-wheel drive system, Adjustable handle, Mulching plug, Grass bag, and Side-discharge chute.

Feature	Description
Engine	Briggs & Stratton 140cc OHV engine with easy-start system
Cutting Width	21-inch steel deck for efficient mowing
Cutting Height	Adjustable 1.5 to 4 inches in 0.5-inch increments
Drive System	Rear-wheel drive with variable speed control
Cutting Options	Mulch, Bag, or Side-discharge capability
Handle	Ergonomic foldable handle with control levers
Wheels	10-inch rear wheels, 8-inch front wheels
Fuel Tank	1.0-gallon capacity
Starter	Recoil start system
Warranty	Limited 3-year residential warranty

Assembly Instructions

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

Attach Handle: Secure upper and lower handle sections with provided bolts and wing nuts.
Install Wheels: Slide wheels onto axles and secure with hairpin clips.
Attach Grass Bag: Hook bag frame onto rear deck brackets.
Install Mulching Plug: Insert plug into rear discharge opening when mulching.
Add Oil and Fuel: Fill engine with SAE 30 oil (20 oz) and unleaded gasoline.

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

Safety Information

Read all instructions before operating. Always follow safety guidelines.

Clear Area: Remove stones, toys, and debris from lawn before mowing.
Protective Gear: Wear safety glasses, long pants, and sturdy shoes.
Keep Bystanders Away: Ensure children and pets are indoors or at a safe distance.
Slope Operation: Mow across slopes, not up and down. Avoid steep inclines.
Hot Surfaces: Keep clear of muffler and engine which become hot during use.

DANGER! Never insert hands or feet under deck while engine is running. Disconnect spark plug before performing maintenance.

Specifications

Model: 20339
Engine: Briggs & Stratton 140cc, 4-cycle OHV
Cutting Width: 21 inches
Cutting Height Range: 1.5 - 4 inches
Deck Material: Powder-coated steel
Drive Type: Rear-wheel drive, variable speed
Wheels: 10-inch rear, 8-inch front
Fuel Capacity: 1.0 gallon
Oil Capacity: 20 oz SAE 30
Weight: 65 lbs (assembled)
Warranty: 3-year limited (residential use)

Controls and Operation

Handle Controls: Drive control lever, Blade control lever, Height adjustment lever.

Starting Procedure:

Check oil and fuel levels.
Push primer bulb 3 times (cold engine).
Set throttle to FAST position.
Pull recoil starter handle firmly.

Operating: Squeeze drive control lever to handle to engage drive. Squeeze blade control lever to handle to engage blade. Release levers to stop.

Stopping: Release both control levers. Move throttle to STOP position.

Cutting Height Adjustment

Adjust all four wheels equally for level cut.

Locate height adjustment lever on each wheel.
Pull lever outward and move to desired setting (1.5 to 4 inches).
Ensure all levers are set to same position.

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

Maintenance Schedule

Interval	Task
Before each use	Check oil level, inspect blade for damage, clear deck of debris
Every 25 hours	Change engine oil, clean or replace air filter
Every season	Sharpen or replace blade, check spark plug, clean underside of deck
As needed	Check tire pressure, lubricate wheel bearings, inspect drive belt

Blade Sharpening: Remove spark plug wire. Tip mower on side. Use file to sharpen blade evenly. Balance blade before reinstalling.

Storage Guidelines

Prepare mower for off-season storage.

Run engine to warm oil, then drain completely.
Add fuel stabilizer to tank and run engine for 5 minutes.
Remove spark plug and add 1 oz of oil to cylinder. Pull starter slowly to distribute.
Clean entire mower, especially underside of deck.
Store in dry, covered area.

CAUTION! Never store mower with fuel in tank for more than 30 days without stabilizer.

Warranty Information

Toro Limited Warranty: 3 years for residential use, 90 days for commercial use from date of purchase. Covers defects in materials and workmanship. Does not cover normal wear, misuse, or lack of maintenance. Keep original receipt as proof of purchase.

For warranty service, contact authorized Toro service dealer or call 1-888-384-9939.

Regulatory Compliance

EPA Certified: Meets EPA emission standards for small nonroad engines. CARB Compliant: Approved for sale in California. ANSI/OPEI B71.1: Complies with safety standards for walk-behind mowers. For more information, visit www.toro.com or contact Toro Customer Support at 1-888-384-9939.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged filter	Check fuel level, drain old gas, clean/replace fuel filter.
Engine runs poorly	Dirty air filter, bad spark plug	Clean/replace air filter, check/replace spark plug.
Uneven cut	Dull blade, uneven tire pressure	Sharpen or replace blade, inflate tires to 15 PSI.
Loss of power	Clogged deck, dirty cooling fins	Clean underside of deck, remove debris from engine fins.
Wheels not driving	Drive belt loose or worn	Adjust tension or replace drive belt.
Excessive vibration	Unbalanced blade, loose parts	Balance or replace blade, tighten all bolts and fasteners.

Service: For repairs not covered in manual, contact authorized Toro dealer or 1-888-384-9939.