BP511S

A high-output backpack brushcutter built for professional users who need strength, reach, and stability on difficult terrain.

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BP511S
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The Shindaiwa BP511S is a heavy-duty backpack brushcutter engineered for contractors who work day in and day out on slopes, banks, and other challenging environments. Its 50.2 cm³ professional engine delivers strong, consistent cutting power, while the backpack frame shifts the weight to the operator’s core for better balance and noticeably lower fatigue compared to handheld units. This design gives the BP511S a clear advantage in areas where long hours and uneven ground make ordinary machines uncomfortable and inefficient.


Every element of the BP511S has been refined to support long, demanding commercial work. A longer shaft improves reach and posture, the enhanced harness provides better comfort, and the updated handle design offers greater control. When the job is done, the split-boom design makes the tool easy to transport and store. Built for reliability, comfort, and long-term performance, the BP511S stands out as a robust choice for professionals who expect their equipment to keep up with them.

Strong professional cutting performance.

Strong professional cutting performance.

The 50.2 cm³ two-stroke engine delivers the power needed for dense growth and extended workloads. A rugged 2-stage air filtration system keeps dirt out of the engine, reducing wear and cutting down on service intervals.

Built for reliability and ease of use.

Built for reliability and ease of use.

A swivel cable system increases flexibility and prolongs throttle cable life. The easy-start system makes starting smooth and predictable, and the protected throttle trigger adds durability. Additional conveniences include a comfortable padded harness, removable tool bag with reflector, extended starter grip, simple momentary switch, and a split-boom design for compact transport and storage.

Designed for long workdays.

Designed for long workdays.

The angled engine position brings the centre of gravity closer to the operator, reducing strain on long shifts and improving handling on slopes. A 100mm extended shaft boosts reach and comfort, while the enlarged, rubber-coated loop handle offers a more secure and comfortable grip.

Product Details.

Engine displacement (cm³) 50.2
Output (kW) 2.2
Output (ps) 3.0
Dry Weight (kg) 12.0
Fuel tank capacity (l) 10.80
Drive shaft type Solid shaft
Drive shaft diameter (mm) 8.0
Main pipe diameter (mm) 28.0
Gear reduction ratio 1.33