RM 4 RT Mulching lawn mower

Robust petrol mulching mower with 1-speed drive

Ideal for large lawns up to 2500m², the RM 4 RT self-propelled mulching mower features optimised design, robustness and high quality equipment such as QuickFix, quick release handles for compact storage and transport, skirt protectors and a powerful Kohler engine. Mulching saves time as the grass clippings do not have to disposed of, instead the shredded grass is returned to the lawn acting as a natural fertiliser. Additional features such as SmartChoke, make the lawn mower easy to start and the double ball-bearing wheels and excellent grip make the mower very comfortable to use, while front and rear carrying handles help with transportation. The RM 4 RT comes with a 5 year extended domestic warranty (subject to registration and annual servicing).

Versions Price
RM 4 RT Lawn mower £649.00*
  • Technical data
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    Technical data Value
    Lawns m² up to 2,500
    Cutting width cm 53
    Cutting height mm 30-70
    Engine type Series XT675 OHV SC
    Displacement cm³ 149
    Nominal output 2.2 kW / 3.0 PS
    Working speed rpm 2,800
    Weight kg 35
    Vibration value ahw m/s² 3.2
    Uncertainty factor K m/s² 1.6
    Guaranteed sound power level LWAd [dB(A)] dB(A) 93
    Uncertainty factor KpA [dB(A)] dB(A) 2

  • Features
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    Standard features

    • Easy start engine

      Thanks to the SmartChoke technology, the engine starts up reliably and with minimal effort both during cold and warm starting. 


    • Self-propelled

      Self-propelled STIHL lawn mowers take the effort out of lawn mowing. The drive mechanism propels the mower without it physically having to be pushed. This makes working easier, especially on large lawns and inclines.

    • Mulching blade

      With the specially shaped mulching blade, the grass is cut in stages and shredded into fine particles in the housing. The fine grass clippings can then fall back onto the turf as a nutritious fertiliser.

    • Smooth running wheels

      The smooth running wheels of the STIHL lawn mowers are extremely robust and hard-wearing. They have been equipped with a traction pattern and directional stability tread pattern for effortless manoeuvring and to help hold perfect line during mowing.

    • Super soft grip

      The super soft grip is comfortable to hold, especially when used over longer periods.

    • Carrying handles

      This STIHL lawn mower is equipped with carrying handles to make transport simple and loading easy. The carrying handles are also suitable as lashing points for securing the lawn mower with a strap during transport.

    • QuickFix quick-clamping devices

      The QuickFix clamping devices can be used to effortlessly fasten or release the handlebar of the STIHL lawn mower. This enables the lawn mower to be folded away compactly or made ready for action without using tools.

    • Central cutting height adjustment

      The central cutting height adjustment is spring-loaded, which makes it easy to set the desired cutting height in several settings. The current height is indicated by a scale.

  • Accessories
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    • Moto4Plus

      Power tool petrol developed specifically for STIHL small 4-stroke engines. User- and engine-friendly thanks to fewer emissions (free from ethanol; almost no olefins and aromatic compounds). Can be kept in storage for up to five years. Reliable top performance – STIHL small 4-stroke engines and STIHL Moto4Plus are made for each other; all conceivable applications have been rigorously tested.

      Versions Price
      Moto4Plus 5 l £19.00* Save and compare
      Save and compare
    • AAL 050 V-belt pulley

      The V-belt pulley enables a speed reduction of 0.5 km/h. This allows the speed of the STIHL lawn mower to be adapted, particularly on dense, uneven terrain. For model RM 4 RT.

      Versions Price
      AAL 050 V-belt pulley £13.00* Save and compare
      Save and compare
    • SAE 30 engine oil

      High-performance engine oil for 4-stroke engines. For use in all conditions in gardens, with high-quality base oils and additives for ideal lubrication and low consumption, API SJ/CF.

      Versions Price
      SAE 30 - 600 ml £4.00* Save and compare
      Save and compare
  • Documents
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    Owners manuals

* Manufacturer's recommended retail price updated as of February 2021. The manufacturer's recommended retail prices are subject to change without notice.

The version(s) available in each country may differ from the above range and specifications; specific details may be subject to change without notice. Please ask your local STIHL Approved Dealer for further information.