Toro 21-inch HP 16551 Operator's Manual

Toro 21-inch HP 16551 Mower manual cover

Pages 12

Year 1989

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of 12

Toro 21-inch HP 16551 Mower Specification

The Toro 21-inch HP 16551 Mower is engineered to deliver robust performance and precision in residential lawn care. This mower features a 21-inch cutting deck, allowing for efficient coverage of medium to large-sized lawns. It is powered by a high-performance engine that ensures reliable operation and consistent power output. The mower is equipped with Toro's patented Recycler Cutting System, which finely chops grass clippings to provide a healthier, lush lawn by enhancing natural fertilization through mulching.

The 16551 model incorporates an adjustable cutting height mechanism, offering a range of settings to accommodate various grass types and user preferences. This feature ensures optimal grass length and contributes to the overall health and aesthetics of the lawn. The mower's ergonomic design includes a comfortable handle with easy-to-access controls, enhancing user comfort and reducing fatigue during prolonged use.

Durability is a key aspect of the Toro 16551, with a robust steel deck construction that withstands tough mowing conditions and extends the mower's lifespan. The mower also features a reliable push-start system, eliminating the hassle of traditional pull-start mechanisms and ensuring a smooth start every time.

Additionally, the design integrates easy-to-remove, high-capacity grass collection bags for efficient disposal of clippings, making maintenance straightforward and less time-consuming. The Toro 21-inch HP 16551 Mower combines reliability, user-friendly features, and advanced cutting technology to offer an efficient and effective solution for maintaining a pristine lawn.

Toro 21-inch HP 16551 Mower F.A.Q.

How do I start the Toro 21-inch HP 16551 Mower?

To start the Toro 21-inch HP 16551 Mower, ensure the fuel valve is open, the throttle is set to the 'fast' position, and the safety bar is held against the handle. Then, pull the starter rope firmly.

What type of oil should I use for maintenance of the mower?

Use SAE 30 oil for warmer temperatures above 32°F (0°C) and SAE 10W-30 for colder conditions. Always check the owner's manual for specific recommendations.

How often should the air filter be cleaned or replaced?

Inspect the air filter every 25 hours of operation or more frequently in dusty conditions. Clean it if necessary and replace it annually or after 100 hours of use.

Why won't the mower start even after pulling the starter rope?

Ensure the fuel tank is full, the spark plug is functioning, and the air filter is clean. Also, check if the engine oil is at the correct level and the safety bar is engaged.

How do I adjust the cutting height on the Toro 21-inch HP 16551 Mower?

Adjust the cutting height by moving the height adjustment levers located on each wheel. Ensure all wheels are set to the same height for an even cut.

What should I do if the mower is vibrating excessively?

Excessive vibration may be caused by a damaged blade, loose engine mounting bolts, or debris lodged in the mower. Inspect these areas and tighten or clean as necessary.

How can I sharpen the mower blade?

Remove the blade by loosening the bolt, then use a grinder or file to sharpen the blade at the original angle. Ensure the blade is balanced before reinstallation.

What is the recommended maintenance schedule for the mower?

Check the oil level before each use, clean the air filter every 25 hours, change the oil every 50 hours, and sharpen the blade annually. Refer to the manual for detailed schedules.

How do I winterize the Toro 21-inch HP 16551 Mower?

To winterize the mower, drain the fuel tank, change the oil, remove the spark plug and add a few drops of oil into the cylinder, and clean the mower thoroughly before storage.

Why is the mower leaving uncut grass behind?

Check if the blade is dull or damaged, the cutting height is set too high, or if the grass catcher is full. Also, ensure you're mowing at the appropriate speed for the grass conditions.