4-Cycle String Trimmers, Weed Trimmers by Troy-Bilt

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Our wide selection of 4-cycle, gas-powered string trimmers are easy to use and there’s no mixing oil and gas. Optional attachments available for select weed trimmer models.

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TB514CS Curved Shaft Gas String Trimmer

29cc, 4-Cycle Curved Shaft Gas String Trimmer / Weed Trimmer

Our most economical 4-cycle gas string trimmer, the Troy-Bilt TB514CS features a heavy duty 4-cycle engine that requires no mixing of oil and gas, is cleaner running and more powerful. And with our new SpeedLock trimmer head, you can reload line in seconds - with nothing to take apart or wind! This cordless weed trimmer model is durable and lightweight for ease of use.

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TB514CS Curved Shaft Gas String Trimmer

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up to 4 items

Overall Rating: 4.2 of 5

(35 reviews)

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TB525 EC Curve Shaft Gas String Trimmer

29cc, 4-Cycle Curve Shaft Gas String Trimmer / Weed Trimmer, Attachment-Capable Design

The TB525 EC gas string trimmer with SpringAssist™ technology is easy to start and easy to use, equipped with a dual line and our SpeedSpool 2™ bump head, allows the trimmer head to be reloaded quickly and easily on the spool! With more power at lower RPM's than a 2-cycle trimmer, this trimmer has an easy-to-use curved shaft and is designed to accept optional trimmer attachments. It also accepts our Press2Start™ electric start adapter. This Troy-Bilt weed trimmer is durable and reliable.

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TB525 EC Curve Shaft Gas String Trimmer

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up to 4 items

Overall Rating: 3.8 of 5

(19 reviews)

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TB575 EC Straight Shaft Gas String Trimmer

29cc, 4-Cycle Straight Shaft Gas String Trimmer / Weed Trimmer, Attachment-Capable Design

The TB575 EC gas string trimmer with SpringAssist™ is easy to start and easy to use, equipped with a dual line bump head and our SpeedSpool 2™ bump head to allow quick and easy loading of line! With no gas and oil mixing, this trimmer has an easy-to-use straight shaft and is designed to accept optional trimmer attachments. It is also capable of accepting our Press2Start™ electric start adapter. This Troy-Bilt weed trimmer has the versatility to meet all your trimming needs.

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TB575 EC Straight Shaft Gas String Trimmer

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up to 4 items

Overall Rating: 3.9 of 5

(20 reviews)

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TB539 ES Curved Shaft Gas String Trimmer

29cc, 4-Cycle Curve Shaft Gas String Trimmer / Weed Trimmer, Attachment-Capable Design

The TB539 ES gas string trimmer has two starting features -- SpringAssist™ technology for easy pull starting or use our Press2Start™ adapter which is included for electric start capability! With its SpeedSpool2™ technology, the TB539 ES can be reloaded without dismantling! This 4-cycle trimmer has an easy-to-use curved shaft, a 17" cutting swath and is designed to accept optional trimmer attachments. With its ease-of-use and versatility, this Troy-Bilt weed trimmer meets all your trimming needs.

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TB539 ES Curved Shaft Gas String Trimmer

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up to 4 items

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Overall Rating: 2.7 of 5

(16 reviews)

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TB590 EC String Trimmer / Brushcutter

29cc, 4-Cycle Gas Weed Trimmer / Brushcutter, Attachment-Capable

The Troy-Bilt TB590 EC gas weed trimmer features a 29cc 4-cycle engine that eliminates oil and gas mixing, runs cleaner, and is more powerful than standard 2-cycle trimmer engines. Built to handle the toughest brush and vegetation, this cordless string trimmer comes with a standard 4-tooth brush blade and a pro-style straight shaft for easy reach under trees and bushes. For the ultimate in versatility, Troy-Bilt offers several add-on trimmer attachments for this model.

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TB590 EC String Trimmer / Brushcutter

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up to 4 items

Overall Rating: 3.8 of 5

(8 reviews)

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TBP6040 XP Straight Shaft Gas String Trimmer

25cc, 4-Cycle Straight Shaft Gas String Trimmer / Weed Trimmer, Attachment-Capable Design

The TBP6040 XP gas string trimmer with SpringAssist™ is easy to start and easy to use. This 4-cycle trimmer has a straight shaft and an over-molded grip and multi-position D handle with a protective barrier bar when using the unit as a brush-cutter. The SpeedSpool2® allows the trimmer to be reloaded without dismantling. It is designed to accept optional trimmer attachments and our optional Press2Start™ electric start adapter. With its ease-of-use, versatility and 3-year limited warranty, this Troy-Bilt weed trimmer will meet all your trimming needs.

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