Mountfield 1643H-SD Twin Ride-on Mower


The 1643H-SD Twin is a dedicated side discharge tractor with a 108cm twin-bladed deck.
With extra power from the upgraded Stiga ST 550 twin-cylinder engine makes even the toughest and largest areas a cinch to cut. It really is a lawn tractor perfect for all gardens up to 3-acres in size.

  • Powered by STIGA with an ST 550 585cc Twin-cylinder engine
  • 108 cm cutting width
  • Pedal operated hydrostatic transmission
  • Seven Cutting height positions, 25 – 80 mm
  • Blades engaged at the touch of a button
  • Optional mulching plug, battery charger and tow hitch available separately

£2,999.00 £3,372.00

The 1643H-SD Twin is a fantastic side discharge lawn tractor. Powered by a formidable Stiga ST550 585cc twin-cylinder engine that is powerful to cut through the toughest of lawns. With no bulky collection basket present, it is also highly manoeuvrable.

The 108cm twin bladed cutting deck makes light work of large areas and the hydrostatic transmission, akin to the automatic transmission in cars, is slick. There are seven cutting heights all selected using one lever and a simple flick of a switch engages the blades.

As a dedicated side-discharge machine this mower is excellent when grass growth is fast, however, you could choose to mulch the clippings using a mulching plug/plate (available as an optional extra) that is simple to fit. When mulching, the clippings are finely cut and blown back down onto the lawn to decompose and return valuable nutrients to the soil.

Cleaning after use couldn’t be easier just connect your hose to the deck nozzle, turn on the water and engage the blades and you will quickly have a clean deck and blades ready for next time.
With a wide range of towed accessories available, the Tow Hitch available as an optional extra makes the 1643H-SD extremely versatile in all seasons.
And of course, the 1643H-SD Twin comes with a reassuring five-year extended warranty. (T&Cs apply). The battery charger, mulching plug and tow hitch are sold separately.

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Weight208 kg


Power10.8 kW
Power sourcePetrol
Battery capacity18 Ah
Engine BrandSTIGA
Engine modelST 550 Twin Powered by STIGA
Displacement586 cm³
Engine rotation speed2800 rpm
Battery Voltage12 V
Engine coolingAir
Fuel tank capacity
6 l
Maximum working area3 m²
Cutting methodSide discharge
Cutting width108 cm
Reverse mowingYes
Blade rotationUntimed
Cutting height adjustmentManual with lever
Cutting height positions7 positions
Cutting height range25 – 80 mm
Number of blades2
Blade typeMulching
Additional cutting methodMulching
Blade engagement typeElectric
Minimum uncut radius65 cm
TractionRear-wheel drive
Transmission methodPedal-operated
Transmission typeHydrostatic
Steering wheelMountfield ergonomic
Seat typeMountfield classic
Seat adjustmentScrews
Front wheel size15×5.00-6
Rear wheel size18×8.50-8
Washing linkYes
Storage compartmentYes
Cup holderYes
Pivoting front axleYes
Antiscalp wheels2
Safety systemSeat with Safety Contact Breaker
Mulching kitOptional
Battery chargerOptional
Trailer hitch kitOptional
Guaranteed sound power level (LwA) – dB(A)
Measured sound pressure level at operator ear dB(A)
Measured sound power level dB(A)
Max vibration on driver’s seat (m/s²)
Max vibration on steering wheels (m/s²)3
Pack weight207.5 kg
Product length1726 mm
Product width1315 mm
Product height1100 mm
Weight159 kg