John Deere SST18 Riding Mower Parts

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The John Deere SST18 Select Series lawn tractor, manufactured from approximately 2002-2005, offered a unique blend of maneuverability and power for homeowners. Powered by an 18 HP V-Twin Kawasaki engine and often equipped with a 42-inch mowing deck, the SST18 was popular for its smooth ride and easy operation. Find all the replacement parts you need to keep your SST18 running like new.

The John Deere SST18 was introduced as part of the Select Series lawn tractors, designed to offer enhanced comfort and performance compared to entry-level models. A key feature was its Synchro Steering Technology (SST), which linked the steering wheel to the rear wheels, providing tighter turning radius and improved maneuverability around obstacles in the yard. This system helped make yardwork easier and more efficient. The SST18 is powered by an 18 horsepower Kawasaki V-twin engine, delivering ample power for mowing and light yard work. The engine size is approximately 603cc. The transmission is a hydrostatic type, offering smooth, variable speed control. Available deck widths were typically 42 inches, providing a good balance between cutting capacity and maneuverability. This model was primarily intended for residential use on medium-sized lawns, and it stands out from other models in the John Deere lineup due to its SST system, offering enhanced control and maneuverability in smaller spaces.

Specifications

Engine	Kawasaki 18 HP 603cc V-Twin
Transmission	Hydrostatic
Deck Size	42 inches
Ground Speed	0-5.5 mph forward, 0-3.2 mph reverse
Fuel Capacity	2.4 gallons
Weight	555 lbs
Years Produced	2002-2005 (approximate)

Maintenance Tips

Check and replace belts (deck and drive) every 2-3 years, or sooner if showing signs of wear (cracks, fraying).
Sharpen mower blades at least once a season, or more often if you mow frequently or encounter sandy soil. Replace bent or damaged blades immediately.
Change the engine oil and filter annually, or every 50 hours of operation. Clean or replace the air filter regularly to ensure proper engine performance.
Before winter storage, stabilize the fuel with a fuel stabilizer, disconnect the battery, and store the tractor in a dry location.

History & Background

The John Deere SST18 was introduced in the early 2000s as part of the Select Series, designed to provide an upgrade over basic lawn tractors. The unique Synchro Steering Technology (SST) was a key selling point. While not heavily redesigned during its production run, the SST18 filled a niche for homeowners seeking improved maneuverability and ease of use.

Frequently Asked Questions

What size deck does the John Deere SST18 have?

The John Deere SST18 typically comes equipped with a 42-inch mower deck.

What engine is in the John Deere SST18?

The John Deere SST18 is powered by an 18 horsepower Kawasaki V-Twin engine.

What belt do I need for my John Deere SST18?

You will typically need both a deck belt and a drive belt. Refer to your owner's manual for the specific belt part numbers or measure the existing belts to find suitable replacements. Common replacement part numbers for the deck belt are GX20072 or GY20570, and the drive belt is M154621. Always verify the correct part number for your specific unit.

What blades fit the John Deere SST18?

The John Deere SST18 typically uses two 21-inch blades to achieve its 42-inch cutting width. Blades with part number M127503 or similar are commonly used for this model. Ensure the center hole and blade length are correct for proper fitment.

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