Toro 21-inch SD 16403 Operator's Manual

Toro 21-inch SD 16403 Mower manual cover

Pages 14

Year 1991

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of 14

Toro 21-inch SD 16403 Mower Specification

The Toro 21-inch SD 16403 Mower is a robust, self-propelled lawn maintenance machine engineered for efficiency and ease of use. It features a 21-inch cutting deck that is designed to deliver precise and clean cuts, ideal for medium to large-sized lawns. The mower is powered by a high-performance engine that ensures consistent power delivery, reducing the need for frequent maintenance and enhancing longevity. Its self-propelled mechanism offers variable speed control, allowing users to adjust the pace to match their comfort level and terrain conditions. Equipped with a durable steel deck, the mower offers superior durability and resistance to wear and tear, ensuring reliable performance over time.

The cutting height can be easily adjusted through a user-friendly lever system, providing a range of options to suit various grass lengths and types. The mower incorporates a mulching feature that recycles grass clippings back into the lawn, promoting healthier grass growth and reducing waste. Additionally, the design includes a rear bagging capability, allowing for easy collection and disposal of clippings if preferred.

Ergonomically designed handles contribute to user comfort, reducing fatigue during prolonged use. The compact design and folding handles make storage convenient, even in limited spaces. The Toro 21-inch SD 16403 Mower combines innovative engineering with practical features, making it a reliable choice for homeowners seeking a balance of power, versatility, and user-friendly operation.

Toro 21-inch SD 16403 Mower F.A.Q.

How do I start the Toro 21-inch SD 16403 Mower?

Ensure the mower is on a flat surface. Press the primer bulb three times, then pull the starter handle firmly. Make sure the throttle lever is set to the 'Start' position.

What kind of oil should I use for the Toro 21-inch SD 16403 Mower?

Use SAE 30 oil for temperatures above 32°F (0°C) and 10W-30 for temperatures below 32°F (0°C) to ensure optimal performance.

How often should I sharpen the mower blades?

Sharpen the mower blades after approximately every 25 hours of use to maintain cutting efficiency and prevent damage to the grass.

What should I do if the mower doesn’t start?

Check the fuel level and ensure the fuel is fresh. Examine the spark plug for wear and replace if necessary. Check the air filter for debris and clean or replace it as needed.

How do I change the cutting height on the Toro 21-inch SD 16403 Mower?

Adjust the cutting height by repositioning the wheels. Use the height adjustment levers located at each wheel. Ensure all wheels are adjusted to the same height.

What is the recommended maintenance schedule for this mower?

Perform regular maintenance including checking and changing the oil every 25 hours of operation, cleaning or replacing the air filter every 25 hours, and inspecting the spark plug annually.

How do I clean the mower after use?

Allow the mower to cool down then use a garden hose to rinse off grass clippings from the underside. Avoid spraying directly onto the engine. Dry thoroughly before storing.

How can I improve the mower's performance on uneven terrain?

Ensure the tire pressure is consistent across all wheels. Adjust the cutting height to a higher setting to avoid scalping the lawn.

What should I do if the mower vibrates excessively during operation?

Check for damage or imbalance in the blade. Tighten any loose bolts or nuts, especially around the blade and engine mountings.

How do I winterize the Toro 21-inch SD 16403 Mower?

Run the engine until it stops from lack of fuel. Change the oil and clean the air filter. Remove the spark plug and add a tablespoon of oil into the cylinder; pull the starter handle slowly to distribute the oil. Store in a dry place.