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Masport 450 ST S18 2'n1

Push / Walk-Behind mower · Model 565831 · Residential-duty · Gas

A$649 Masport Australia RRP

Recommended retail price in Australian dollars, read 20 Oct 2026 from the Masport Australia product page. Whether it includes GST is not stated on the page.

Sold in Australia — listed on masport.com, checked 20 Oct 2026.

Dealers set the final price; delivery, assembly and any local offer are extra and are not tracked here.

The Masport 450 ST S18 2'n1 is a residential-grade gas walk-behind mower, suited to small-to-mid home lawns, with a 18-inch deck and a 140cc engine. It weighs 59.1 lb (26.8 kg).

At a glance

Power Source
gas
Cutting Width
18.1 in (460 mm)
Displacement
8.5 ci (140 cc)
Weight
59 lbs (26.8 kg)
Compare this mower: Pick another Masport push / walk-behind or pick from every push / walk-behind mower sold in Australia   or quick compare: vs 100 ST 2'n1 · vs 200 ST 3'n1 · vs 2'n1 Time Saver - DOV
Compare similar mowers See how this mower compares with machines of a similar size and purpose.
  • Cox Push 18SL 18 in
    Deck 457 mm (18 in) · Loncin Loncin 139cc, 139 cc · RRP A$399
    Why: Same class: push / walk-behind · 18 in deck, within 2 in of this model's 18.1 in · Gas engine, like this model · Residential-duty, like this model · By Cox, a different maker
    Compare with the 450 ST S18 2'n1 ›
  • Victa 18 in Corvette 100 Steel Base, Cut & Catch Push Mower
    Deck 457 mm (18 in) · Briggs & Stratton, 140 cc · RRP A$549
    Why: Same class: push / walk-behind · 18 in deck, within 2 in of this model's 18.1 in · Gas engine, like this model · Residential-duty, like this model · By Victa, a different maker
    Compare with the 450 ST S18 2'n1 ›
  • Victa 18 in Corvette V144 Steel Base, Mulch Push Mower
    Deck 457 mm (18 in) · Victa, 144 cc · RRP A$469
    Why: Same class: push / walk-behind · 18 in deck, within 2 in of this model's 18.1 in · Gas engine, like this model · Residential-duty, like this model · By Victa, a different maker
    Compare with the 450 ST S18 2'n1 ›
  • Bushranger 46TB6M, 625 Series Mulch & Catch Lawn Mower
    Deck 457 mm (18 in) · Briggs & Stratton 625 Series, 150 cc · RRP A$669
    Displacement 150 cc (9.2 ci) (this model: 140 cc (8.5 ci))
    Why: Same class: push / walk-behind · 18 in deck, within 2 in of this model's 18.1 in · Gas engine, like this model · Residential-duty, like this model · By Bushranger, a different maker
    Compare with the 450 ST S18 2'n1 ›
  • Bushranger 46TB5EM 500E Series Mulch & Catch Lawn Mower
    Deck 457 mm (18 in) · Briggs & Stratton 500E series vertical shaft engine., 140 cc · RRP A$589
    Weight 30 kg (66 lbs) (this model: 26.8 kg (59 lbs))
    Why: Same class: push / walk-behind · 18 in deck, within 2 in of this model's 18.1 in · Gas engine, like this model · Residential-duty, like this model · By Bushranger, a different maker
    Compare with the 450 ST S18 2'n1 ›

Chosen by stated rules, not opinion: same class, a deck within 2 in of this one, the same kind of power and a compatible duty class, then the closest power, weight and price, with other makers preferred. Figures are the manufacturers’ published ones; nothing is estimated.

Engine

Masport 450 ST S18 2'n1 engine specifications
Power Sourcegas
Displacement8.5 ci (140 cc)
Start TypeReadyStart
Engine MakeBriggs & Stratton
Engine ModelOHV Series 575EX

Deck

Masport 450 ST S18 2'n1 deck specifications
Cutting Width18.1 in (460 mm)
Min Cut Height0.4 in (10 mm)
Max Cut Height3.1 in (79 mm)
Deck MaterialSteel
Blades4
Cut Positions10
DischargeCut, Catch, Mulch

Drive

Masport 450 ST S18 2'n1 drive specifications
Drive SystemPush

Dimensions

Masport 450 ST S18 2'n1 dimensions specifications
Weight59 lbs (26.8 kg)

General

Masport 450 ST S18 2'n1 general specifications
Bagger Capacity1.3 bu (46.5 L)

Similar models

Other push / walk-behind mowers with comparable specs — including other brands — that buyers cross-shop with the 450 ST S18 2'n1.

Professional-grade 60V lawn mower Kress · 18.1 in (460 mm)
Push 18SL 18 in Cox · 18 in (457 mm)
18 in Corvette 200 Steel Base, Mulch or Catch Push Mower Victa · 18 in (457 mm)
18 in Corvette 100 Steel Base, Cut & Catch Push Mower Victa · 18 in (457 mm)
18 in Super Mulcher Petrol Lawn Mower Victa · 18 in (457 mm)
RMA 348 V Battery Lawn Mower AK System STIHL · 18.1 in (460 mm)

See all Masport mowers and specs ›

Spot a wrong spec? Suggest a correction.

Independent reference database. Specs compiled from manufacturer sources and normalized for comparison; verify with the manufacturer or dealer before purchase.

What the specs work out to

Figures MowerFacts computes from Masport’s own numbers — not published by the manufacturer.

Gate & trailer fit

  • 32 in gateFits
  • 36 in gateFits
  • 48 in gateFits

Needs at least 25 in of clearance (estimated).

Fit uses the deck width plus 6 in for the discharge chute, because Masport doesn't publish an overall width — measure before buying if a gate is tight.

Source: Masport (manufacturer) · archived copy

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