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AL-KO Petrol Lawnmower Highline 51.7 SP

(51cm) Petrol 163cc B&S 650EXi Rotary Self Propelled Lawnmowercode: AK119893
Now £499.00 inc. VAT
Was: £549.00 inc. VAT You Save: £50.00 inc. VAT (9%)
Delivery within 3-5 working days
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The Highline 51.7 SP is a 4-in-one self propelled lawnmower suitable for medium / large lawns.

4INONE function

Self Propelled

Central 7-Stage cutting height adjustment

Large 70 litre EasyClick grass collector

Quality Briggs & Stratton 650 EXi engine.

The Highline 51.7 SP 4INONE is a high quality, German engineered self propelled 52cm petrol lawnmower powered by a Briggs & Stratton engine featuring the latest EXi technology.

A quality Briggs & Stratton 650 EXi 163cc petrol engine provides fantastic performance with the ReadyStart feature enabling easy starting without the need to prime. The advanced engineering on this engine eliminates the need for regular oil changes, just check the oil levels and add more when required. The engine also powers the wheel drive feature of the lawnmower which removes the requirement to push as the lawnmower will propel itself which is particularly advantageous when mowing sloped lawns.

The 4INONE function makes this mower versatile and suitable for use in a range of different mowing environments thanks to the mowing, collection, mulching and side discharge capabilities.

The MAX AIRFLOW Steel deck combined with large discharge channel increases airflow under the mower deck resulting in the grass cutting being thrown backwards in a high arc into the back of the large 70 litre capacity grass collector meaning that the collector is effectively filled from the back without the discharge channel becoming blocked.

When the grass collector box is full, the integrated indicator will alert the user. XXL smooth running wheels make the mower easy to manoeuvre over rough ground and the mowing is complete, the mower can be stored in an upright position due to the useful integrated space saving storage position.

Wide XXL wheels.

The XXL wheels with double ball bearings enables the mower to be pushed smoothly across grass or uneven land


The 4INONE function allows the user to mow, collect, mulch and side discharge all from a single machine for maximum durability.

MaxAirflow Technolgy.

The extra tall steel decks and large discharge channel increase the airflow resulting in grass clippings being thrown in a high arc to the back of the collector ensuring the collector is filled to the top and discharge channel does not get blocked.

Storage Function.

The Highline lawn mowers can be stood vertically to enable easier under deck cleaning and to save space whilst they are stored away thanks to the integrated storage function.



Power SupplyPetrol
Engine/Motor ManufacturerBRIGGS & STRATTON
Engine Model650 EXi
Engine Stroke2 Stroke
Engine/Motor Size (cc)163cc
Ignition/Start TypeRecoil
TypeFour Wheeled
Blade TypeRotary
Mowing FunctionCut / Collect / Side Discharge
Drive TypeSELF PROPELLED - Single Speed
Rear Collect/Side DischargeRear Collect
Cutting Height ControlYes
No. Height Adjustments7
Height Of Cut (mm)30-80mm mm
Cutting Width51 cm
Cutting Deck MaterialMetal
Front Wheels (mm)200 mm
Rear Wheels (mm)280 mm
Grass Bag Capacity (Ltr)70 l
Weight (Kg)35.5 Kg
Max Domestic Warranty (Yrs)5

For detailed information, please click here

Free Next Day Delivery on orders over £150.00 including vat to UK Mainland. Under £150.00, a carriage charge of £6.99 will be charged.  

No deliveries will be made on Bank Holidays.

No Weekend Deliveries Available.

Deliveries will be made by either Royal Mail, Fedex or DPD.

Please note there maybe extra charges to the follow postcodes some parts of Scottish Highlands and Ireland

Please allow additional few days for all machinery delivery due to Volumetric Weight and Size.

Important Note:

All Tractors, Robotic Mowers are strictly for bespoke delivery by our workshop. We DO NOT SHIP as these products are to be fully built, tested and delivered by our workshop within a 20 Mile Radius of our premises.

All other machinery can also benefit from our bespoke service, additional cost do apply. 

Hopefully you won’t need to return an item of your order, if you do, we’re here to help. Firstly let us know. E-mail hello@gaywaysltd.co.uk, Telephone 020 8908 4744 Please have your 'invoice number' to hand so we can deal with your request.


Please call Customer Services on 020 8908 4744 for any delivery inquiries or click here to know more.

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