Toro Model 21321 Manual

The Toro Model 21321 is a high-performance walk-behind lawn mower featuring a Briggs & Stratton engine, 21-inch cutting deck, 3-in-1 discharge system (mulch/bag/side discharge), single-lever height adjustment, easy-start technology, and durable steel construction. Designed for residential use, it offers reliable cutting performance, easy maneuverability, and low maintenance. Below are key sections for safety, features, assembly, operation, maintenance, troubleshooting, and specifications.

Features at a Glance

Key components: Briggs & Stratton engine, 21-inch steel cutting deck, single-lever height adjustment, rear bagger, mulch plug, side discharge chute, and easy-start system.

Feature	Description
Engine	Briggs & Stratton 125cc OHV engine with easy-start technology
Cutting Width	21 inches
Cutting Deck	Durable steel construction with reinforced edges
Height Adjustment	Single-lever control for 6 cutting positions (1.5-4 inches)
Discharge System	3-in-1 (mulch, bag, side discharge)
Drive System	Push-powered (non-self-propelled)
Wheels	8-inch rear, 7-inch front wheels for easy maneuverability
Starter	Recoil start system
Fuel Tank	0.5-gallon capacity
Weight	Approximately 65 lbs

Assembly Instructions

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

1. Attach handle: Align handle with deck brackets, secure with provided bolts and wrench.
2. Install wheels: Slide wheels onto axles, secure with retainer clips or nuts.
3. Attach discharge chute: Align chute with deck opening, secure with wing nut.
4. Install bagger: Hook bagger frame onto rear brackets, ensure secure fit.
5. Add mulch plug (if mulching): Insert plug into rear discharge opening.
6. Add oil and fuel: Fill engine with SAE 30 oil (check dipstick), add unleaded gasoline.

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

Safety Information

Read all instructions before operating. Always wear appropriate safety gear.

1. Clear mowing area of debris, rocks, and toys before starting.
2. Never operate without proper guards or discharge chute in place.
3. Keep hands and feet away from moving parts, especially under deck.
4. Do not mow on slopes greater than 15 degrees; mow across slopes, not up/down.
5. Stop engine and wait for blades to stop before unclogging or adjusting.
6. Refuel outdoors only, with engine off and cool.
7. Keep children and pets away from mowing area.

CAUTION! Risk of blade contact; always disconnect spark plug before maintenance.

Specifications

• Model: Toro 21321
• Engine: Briggs & Stratton 125cc, 4-cycle OHV
• Cutting Width: 21 inches
• Cutting Heights: 6 positions, 1.5 to 4 inches
• Deck Material: Steel
• Discharge Options: Mulch, Bag, Side Discharge
• Wheel Size: Front 7-inch, Rear 8-inch
• Fuel Capacity: 0.5 gallons
• Oil Capacity: 20 oz (SAE 30)
• Weight: 65 lbs (approx.)
• Warranty: 2-year limited

Controls and Operation

Handle Controls: Throttle control, drive control bar (if equipped), height adjustment lever.

Starting Procedure:

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

Stopping: Release drive control, move throttle to STOP, wait for blades to stop.

Operation Tips: Mow when grass is dry; overlap passes for even cut; avoid mowing in reverse.

Cutting Height Adjustment

Single-lever adjustment for all four wheels simultaneously.

1. Stop engine and wait for blades to stop.
2. Pull height adjustment lever outward.
3. Move lever to desired height setting (1-6).
4. Release lever to lock in position.
5. Test mower on flat surface to ensure even cut.

Recommended Heights: 2.5-3 inches for most grasses; higher in hot/dry conditions.

3-in-1 Discharge System

Configure for mulching, bagging, or side discharge.

1. Mulching: Install mulch plug in rear opening; remove bagger and side chute.
2. Bagging: Attach bagger to rear brackets; ensure side chute is removed.
3. Side Discharge: Install side discharge chute; remove mulch plug and bagger.

Tip: Empty bag frequently to maintain airflow and cutting performance.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Interval	Task
Before each use	Check oil level, inspect blade, clear deck of debris
Every 25 hours	Change oil, clean/replace air filter, check spark plug
Every season	Sharpen or replace blade, lubricate wheels and height adjuster
Storage	Drain fuel or add stabilizer, clean entire mower

Blade Sharpening: Disconnect spark plug, remove blade, sharpen at 30-degree angle, balance before reinstalling.

Storage Guidelines

Prepare mower for off-season storage to prevent damage.

1. Clean underside of deck thoroughly.
2. Drain fuel tank or add fuel stabilizer and run engine 5 minutes.
3. Change oil and replace air filter.
4. Remove spark plug, add 1 teaspoon oil to cylinder, pull starter slowly to coat.
5. Store in dry, covered area, preferably on level surface.

CAUTION! Never store with fuel in tank indoors or near open flame.

Warranty Information

Toro Model 21321 includes 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 Toro dealer or call 1-888-384-9939. Register product online at www.toro.com for faster service.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, old gas, clogged filter	Check fuel level; use fresh gas; clean/replace air filter.
Engine runs poorly	Dirty air filter, old oil	Replace air filter; change oil; check spark plug.
Uneven cutting	Dull blade, uneven height	Sharpen/replace blade; adjust cutting height evenly.
Excessive vibration	Loose blade, debris in deck	Tighten blade bolt; clean deck interior.
Bag not filling	Wet grass, clogged deck	Mow when grass dry; clean deck and bagger passages.
Wheels hard to turn	Debris in axles, lack of lubrication	Clean axles; apply light oil to wheel bearings.

Service: For technical support, contact Toro at 1-888-384-9939 or visit www.toro.com.