STIHL RM 655 YS Gas-Powered Lawn Mower with Hydrostatic Drive

The STIHL RM 655 YS is a gas-powered, self-propelled mower aimed at larger properties, built around a 173cc engine and set apart by a hydrostatic drive that lets you dial in ground speed continuously rather than in fixed gears.

Hydrostatic drive

Unlike a stepped gear drive, the hydrostatic transmission adjusts speed smoothly and continuously from about 2.6 to 4.6 km/h, so you can fine-tune your pace to terrain or grass density instead of picking between a few fixed speeds.

Blade-brake clutch

A blade-brake clutch lets you stop the cutting blade while leaving the engine running, so you can pause to clear a path or empty the catcher without a full restart.

Durable aluminum housing

The mower deck is built from aluminum with replaceable protective strips, which resists corrosion better than steel over years of outdoor storage and use.

Key features

• 173cc STIHL Series HD775 OHV engine
• 53 cm (21 in) cutting width, aluminum deck
• Hydrostatic, infinitely variable self-propelled drive
• Blade-brake clutch for engine-running pauses
• Central 7-position cutting height adjustment, 25-85 mm range
• 70-liter grass catcher with fill-level indicator
• 3-in-1 cutting, catching, and mulching
• Height-adjustable, folding comfort handlebar

Specifications

Frequently asked questions

What fuel and oil does it use?

It runs on regular unleaded gasoline with 4-stroke engine oil per STIHL's engine specification; check the oil level before each use as with any gas mower.

What does the hydrostatic drive do differently?

It replaces the fixed gears found on simpler self-propelled mowers with a stepless hydraulic transmission, letting you adjust ground speed smoothly to any point in its range instead of jumping between preset speeds.

How is this different from the RM 655 VS?

The RM 655 YS uses a hydrostatic transmission for stepless speed control, while the RM 655 VS uses a simpler Vario gear-drive system; both share the same 173cc engine and 53cm cutting width but are separate models with separate part numbers.

What is in the box

The box includes the mower, a 70-liter folding grass catcher with fill-level indicator, and a folding, height-adjustable handlebar.