RM 4.0 RTP 21” Mulcher


The STIHL RM 4.0 RT petrol lawnmower is a mulching specialist. The specially shaped mulching blade shreds the grass step-by-step into fine particles, which then fall back onto the turf.

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The RM 4 RTP is a self-propelled professional mulching mower, designed with power and endurance in mind. The machine includes several features which make it the natural choice for professionals such as central height adjustment, front and rear carrying handles and ergonomic controls. To make this a robust machine and well suited to the pro market, it features a powerful easy start engine, cast aluminium deck, large rubber wheels with aluminium rims, crankshaft protection, front and side deck protection and a protective gearbox cover. Primary areas of use include parks, orchards and roadside verges. Low vibration figures make it the ideal machine for use by professionals.

  • Easy start engine
  • Self-propelled
  • Mulching blade
  • Super soft grip
  • Carrying handle
  • Sheet steel deck
  • Aluminium deck
Technical data
Technical data Value
Lawns m² up to 2.500
Cutting width cm 53
Cutting height mm 30-70
Engine type Series XT800 OHV SC
Displacement cm³ 173
Nominal output U/min 2.6 kW / 3.5 PS
Working speed rpm 2.800
Weight kg 44
Vibration value ahw m/s² 2.4
Uncertainty factor K m/s² 1.2
Guaranteed sound power level LWAd [dB(A)] dB(A) 93
Uncertainty factor KpA [dB(A)] dB(A) 2


Additional information

Weight 36 kg



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