STIHL RM4 RTP Professional 21″ Mulch Lawn mower

STIHL RM 4 RTP 21" Professional Self-Propelled Petrol Mulching Lawn Mower for Large Gardens

STIHL’s 21" petrol professional self-propelled mulching lawn mower is built to handle large gardens and demanding conditions with ease. Powered by a reliable and easy-start HD775 OHV SC engine, this single-speed, front-wheel-drive mower delivers strong performance to a 53 cm (21") single mulching blade. Furthermore, the blade is housed within a cast aluminium deck, which is coated with a durable polymer plastic finish to help prevent minor scratches and reduce the risk of corrosion.

Designed for professional use, this 44 kg petrol mulching mower is fitted with four rubber wheels with double ball bearings, ensuring smooth operation over long distances and rough ground. As a result, stability, traction, and durability are maintained even in challenging environments. Here at APS, each mower is fully assembled and tested before delivery or collection from one of our showrooms located in London and Essex.

In addition, the STIHL RM 4 RTP is an excellent choice for professionals who demand outstanding mulching performance. Thanks to its optimised design, robust construction, and high-quality components—including anti-vibration elements, skirt protectors, and a powerful engine—this mower is built for comfort and longevity. Moreover, features such as Smart-Choke, double ball-bearing wheels, and excellent grip make operation effortless, while front and rear carrying handles allow for easy transportation when required.

Warranty- (STIHLS T&C'S Apply)

• Domestic - 5 Years 
• Commercial - 1 Year

Technical data:

• Lawn size up to 2.500m²
• Cutting width 53cm/21"
• Nominal output2.6 kW/3.5 PS
• Cutting height 30-70mm
• Weight 44kg
• Start / StopHandlebar dstart/Motor Stop
• DriveSingle speed
• Working speed 2.800rpm
• Dimensions (L/W/H) 140 x 57 x 108cm
• Guaranteed sound power level 93dB(A)
• Measured workplace LpA 80dB(A)
• Uncertainty factor 1dB(A)
• Vibration value (AHW) 2.40 / 1.20m/s2