All about the product

Self-Propelled Gas Lawn Tractor | Combined Lawn Mower | 11 kW, 107 cm (YT-85551)

Self-Propelled Gas Lawn Tractor YT-85551 – a powerful and convenient combined lawn mower designed for the maintenance of large lawns in farms, private estates, and commercial areas. Its 11 kW (14.96 HP) LONCIN LC1P91F-1 engine and 107 cm cutting width allow for quick and even mowing of large areas, while the hydrostatic drive ensures smooth movement without gear shifting.

The tractor features a 5-step central cutting height adjustment of 35–75 mm, allowing the cutting to be adapted to the lawn's condition and season. An integrated 220 l grass collection bag reduces the frequency of emptying, while a comfortable seat, ergonomic levers, and large wheels ensure comfortable operation.

Main Features

• Powerful 11 kW gasoline LONCIN engine (14.96 HP) with overhead valves.


• Wide 1070 mm (107 cm) cutting width with two cutting blades.


• 5-level central cutting height adjustment in the range of 35–75 mm.


• Self-propelled with hydrostatic (automatic) transmission – smooth speed adjustment.


• Electric starter – quick and convenient ignition.


• 220 l capacity grass collection bag with mesh.


• Large 15" front and 17" rear wheels for good traction on uneven surfaces.


• Front headlights for working in low visibility conditions.


• Integrated towing hook for the trailer (compatible with YT-85554).


• Comfortable, adjustable seat and ergonomically placed control levers.

Technical Specifications

• Brand / Series: Yato, GRF (EU representative: TOYA S.A.).


• Engine: LONCIN LC1P91F-1, gasoline, 4-stroke, with overhead valves (OHV).


• Engine displacement: 546 cm³.


• Power: 11 kW (14.96 HP).


• Max. RPM: 2650 min⁻¹.


• Cutting width: 1070 mm (107 cm), 2 cutting blades.


• Cutting height: 35–75 mm.


• Cutting height levels: 5, central adjustment.


• Grass bag capacity: 220 l, mesh.


• Fuel type: unleaded gasoline E10.


• Fuel tank capacity: 5 l.


• Oil type: SAE 15W-40.


• Oil tank capacity: 1.6 l.


• Drive: self-propelled, hydrostatic transmission (automatic).


• Ignition: electric starter.


• Voltage: 12 V DC.


• Battery type: lead-acid.


• Battery capacity: 12000 mAh, charger included.


• Spark plug: RN9YC.


• Air filter type: T420.


• Cooling: air.


• Body material: metal.


• Wheels: front 15" (381 mm) ×2, rear 17" (432 mm) ×2.


• Number of engine cylinders: 1.


• Number of engine strokes: 4.


• Acoustic sound pressure level: 85.73 ± 3.0 dB(A).


• Acoustic sound power level: 98.1 ± 1.06 dB(A).


• Vibration: 6.113 ± 2.4 / 6.103 ± 2.4 / 1.937 ± 0.8 m/s².


• Weight: 188.5 kg.


• Compatible with: trailer / accessory YT-85554 (towing hook included).


• Symbol: YT-85551.

Additional Information and Equipment

• Ability to mow in reverse.


• Integrated lights for better visibility in the dark or cloudy days.


• Integrated cup holder for longer work sessions.


• Convenient, ergonomically arranged control elements and levers.


• Sturdy metal body designed for use in intensive conditions.

Operation and Safety

• The engine is factory filled with gasoline but without oil – before the first start, it is necessary to add engine oil and fuel.


• The first oil change is recommended after ~5 working hours, then every 20–25 working hours.


• Always check the oil level and overall technical condition before operation.


• Do not use the lawn mower without a complete grass collection system or a deflector.


• Always keep hands and feet away from the blades and discharge openings.


• Use personal protective equipment: hearing, eye, and foot protection.

Instructions