toro model 20339 manual

The Toro Model 20339 is a high-performance, walk-behind lawn mower designed for residential use. It features a powerful engine, variable speed self-propulsion, electric start capability, a durable steel deck, and mulching/bagging/side discharge options. This manual covers safety, assembly, operation, maintenance, troubleshooting, and specifications to ensure proper use and longevity of your mower.

Features at a Glance

Key components: Steel cutting deck, Briggs & Stratton engine, Self-Propel drive system, Electric start with backup recoil, Height adjustment lever, MulchPlug, Rear bagger attachment.

Assembly Instructions

Unpack all parts from the box. Verify contents against the parts list in the manual.

1. Attach the Handle: Align lower handle brackets with deck mounts. Secure with provided bolts and wing nuts.
2. Install the Upper Handle: Connect upper handle section to lower handle. Tighten knobs securely.
3. Attach the Grass Bag: Slide bagger frame onto rear deck hooks. Ensure it locks into place.
4. Connect the Battery: For electric start models, connect the red cable to positive (+) terminal and black to negative (-).
5. Add Engine Oil & Fuel: Add SAE 30 motor oil to full mark on dipstick. Add fresh unleaded gasoline (87 octane minimum).

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

First-Time Setup & Operation

Before first mow, complete pre-operation checks.

1. Check Oil & Fuel: Verify oil level is correct and fuel tank is filled with fresh gasoline.
2. Adjust Cutting Height: Set the single lever to desired height (start at highest setting for first mow).
3. Select Discharge Mode: Install MulchPlug for mulching, attach bag for bagging, or remove both for side discharge.
4. Start the Engine: Insert safety key. For electric start, turn key to "START". For recoil, pull cord briskly.
5. Engage Self-Propel: Squeeze drive control lever to handle to engage drive. Release to stop.

CAUTION! Clear mowing area of debris. Do not operate on slopes greater than 15 degrees.

Specifications

• Model: Toro 20339
• Engine: Briggs & Stratton 163cc, 4-cycle OHV
• Cutting Width: 21 inches
• Cutting Height Range: 1.25 - 3.75 inches (6 positions)
• Drive: Variable speed self-propelled (0-3.5 mph)
• Starting: Electric with 12V battery & recoil backup
• Deck Material: Powder-coated steel
• Wheels: 10" rear, 8" front
• Fuel Capacity: 1.1 quarts
• Oil Capacity: 20 oz (SAE 30)
• Weight: 78 lbs (approx.)

Controls and Functions

Primary controls located on the handle.

Handle Controls: Drive Control Lever (squeeze to go), Height Adjustment Lever, Electric Start Key Switch, Recoil Starter Handle, Bag Full Indicator.

Engine Controls: Throttle Control (CHOKE/RUN/FAST), Primer Bulb, Fuel Shut-Off Valve. Safety Features: Operator Presence Control (release handle to stop blade and drive), Safety Key, Blade Control Lever (must be engaged to start).

Maintenance Schedule

Regular maintenance ensures optimal performance and safety.

1. Before Each Use: Check oil level, inspect blade for damage, clear deck of debris.
2. Every 25 Hours: Sharpen or replace blade. Check air filter, clean or replace if dirty.
3. Every 50 Hours: Change engine oil (or annually). Check spark plug.
4. Every 100 Hours/Season End: Replace air filter, spark plug. Clean under deck thoroughly. Check drive belt tension.
5. Storage: Run engine dry of fuel or add fuel stabilizer. Remove battery for electric start models.

Tip: Always disconnect spark plug wire before performing any maintenance.

Cutting & Discharge Options

Supports three modes: Mulching, Bagging, Side Discharge.

1. Mulching: Install MulchPlug fully into the discharge chute. Cuts clippings finely and returns them to lawn.
2. Bagging: Attach grass bagger to rear hooks. Ensure bag is empty before it reaches "Full" indicator.
3. Side Discharge: Remove both MulchPlug and bagger. Clippings discharge from side chute (use optional side discharge deflector).
4. Height Adjustment: Use single lever to raise or lower deck. Match height to grass condition (taller for dry, shorter for damp).

WARNING! Never operate without a discharge chute, MulchPlug, or bagger properly installed. Keep hands and feet away from chute.

Safety Features

Operator Presence Control: Blade and drive stop within 3 seconds if handle is released. Safety Key: Must be inserted to start engine. Blade Control Lever: Interlock prevents engine starting unless lever is engaged. Rear Bagger Safety: Engine will shut off if bagger is removed during operation (on some models).

Storage & Winterization

Prepare mower for off-season storage.

1. Clean: Thoroughly clean underside of deck, wheels, and exterior.
2. Fuel: Option A: Run engine until fuel tank is empty. Option B: Fill tank and add fuel stabilizer, run engine for 5 minutes.
3. Oil: Change engine oil if due.
4. Battery: For electric start models, remove battery and store in a cool, dry place. Charge periodically.
5. Store: Keep in a dry, covered location. Engage height adjuster to highest setting to relieve spring tension.

CAUTION! Never store mower with fuel in tank indoors or near open flame. Gasoline is flammable.

Warranty Information

Toro Limited Warranty: 2-year full warranty for residential use. Covers defects in materials and workmanship. Engine covered by separate Briggs & Stratton warranty. Proof of purchase required. For warranty service, contact an authorized Toro service dealer. For support, visit www.toro.com or contact Toro Customer Support at 1-888-384-9939.

Troubleshooting

Reset: For electric start models, ensure battery is charged. Reset circuit breaker if equipped.

Service: 1-888-384-9939; www.toro.com. Use only Toro-approved parts.