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Masport Petrol Lawn Mower 400ST S18 140cc 4 Stroke


or 4 interest-free payments of $119.75

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Own it now, pay later.
  • Cut & Catch.
  • 2 Blade Disc System.
  • 18" Steel Deck.
  • RapidStart™ 4 stroke engine. 
  • 460mm (18") steel chassis.
  • Mulch Ready - Mulch Plug available as optional extra.
  • Front 175mm (7") and Rear 200mm (8") adjustable mono bearing wheels.
  • Comfortable upturned upper handle with PVC grip. 
  • Two piece lower handle for easy catcher access.
  • HDPE Plastic Catcher.
  • Power Rating (Torque) - 5ft/lb or 6.8Nm.
  • Catcher Volume - 46.5L.
  • Cutting Height Range – 8mm - 68mm.
  • Cutting Height Steps - 10.
  • Cutting Height Adjustment - Single Point.
  • Weight - 25.3kg.

Allow from 1-14 working days to collect. Products delivered to one of over 400 Mitre 10 and True Value Hardware stores across Australia.

In stock

Available nationally however we do exclude some remote and regional areas, for these areas contact your local store for delivery options. Standard delivery terms apply, calculated at checkout.

Local deliveries, DIY only, excludes trade sales. Find out more about our Delivery policy.

Collect from one of over 400 Mitre 10 or True Value Hardware stores across Australia. Check stock availability online. The store will contact you when the order is ready.

Find your nearest store


Choose the best for your lawn. The 400ST S18 lawn mower from Masport is perfect for jobs of every size, boasting a Briggs & Stratton Series 500E OHV 140cc 4 stroke petrol engine for enhanced performance and reliability. Equipped with RapidStart™ technology, the 400ST S18 is designed to start with fewer primes and pulls, helping you get down to business sooner. The durable steel deck gives you a big 18-inch (460mm) footprint, meaning less time spent cutting your lawn and more time enjoying it. 

With more than 80 years of experience building mowers, you can trust Masport for a clean cut every time. Backed by a generous four-year warranty on both chassis and engine, and with Briggs & Stratton’s own Starting Promise, Masport has you covered. 

Product Dimensions
Shipped Weight (kg)



National SKU


Product Code

Bulky Goods

Local Deliveries

Many Mitre 10 stores offer a local delivery service. Contact your local store about what options you have for local delivery.


This Policy is provided by the Mitre 10 store participating in this website that has been selected by the customer to buy the particular product/s that are subject to this Policy (Store). The Store is not required to provide a refund or replacement if the customer changes their mind. But the customer can choose a refund or exchange if a product has a major problem. View the Full Return Policy.

What you need to know before purchasing

  • Not all stores carry stock of this product, but will order it in for you. 
  • Please allow up to 14 days for stock to arrive at your selected store.
  • Products are available while stocks last.
  • Contact your local store to check stock availability.
  • Images are for illustration purposes only.
  • Price is available to online purchases only.
  • Price when purchasing in-store may vary.

Many of our products come with a guarantee or warranty from the manufacturer. In addition, they come with guarantees that cannot be excluded under the Australian Consumer Law. You are entitled to a replacement or refund for a major failure and compensation for any further reasonably foreseeable loss or damage. You are entitled to have the goods repaired or replaced if the goods fail to be of acceptable quality and the failure does not amount to a major failure. Full details of your consumer rights may be found at

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