MowerFacts
Home › Australia › Push / Walk-Behind › Masport › Lawn Marshal ST S18 M&C

Masport Lawn Marshal ST S18 M&C

Push / Walk-Behind mower · Model 565984 · Residential-duty · Gas

A$529 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 Lawn Marshal ST S18 M&C is a residential-grade gas walk-behind mower, suited to small-to-mid home lawns, with a 18-inch deck and a 139cc engine. It weighs 61.1 lb (27.7 kg).

At a glance

Power Source
gas
Cutting Width
18.1 in (460 mm)
Displacement
8.5 ci (139 cc)
Weight
61 lbs (27.7 kg)
Compare similar mowers See how this mower compares with machines of a similar size and purpose.
  • 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 Lawn Marshal ST S18 M&C ›
  • 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 Lawn Marshal ST S18 M&C ›
  • 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 Lawn Marshal ST S18 M&C ›
  • Deck 457 mm (18 in) · Briggs & Stratton 625 Series, 150 cc · RRP A$669
    Fuel capacity 1.5 L (0.4 gal) (this model: 0.9 L (0.2 gal))Displacement 150 cc (9.2 ci) (this model: 139 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 Lawn Marshal ST S18 M&C ›
  • Deck 460 mm (18.1 in) · 145 cc · RRP A$849
    Weight 32 kg (71 lbs) (this model: 27.7 kg (61 lbs))Max cut height 74 mm (2.9 in) (this model: 79 mm (3.1 in))
    Why: Same class: push / walk-behind · Same 18.1 in deck · Gas engine, like this model · Residential-duty, like this model · By Honda, a different maker
    Compare with the Lawn Marshal ST S18 M&C ›

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 Lawn Marshal ST S18 M&C engine specifications
Power Sourcegas
Displacement8.5 ci (139 cc)
Start TypeAuto Choke
Engine MakeAL-KO
Engine ModelOHV Series SIX

Deck

Masport Lawn Marshal ST S18 M&C deck specifications
Cutting Width18.1 in (460 mm)
Min Cut Height0.6 in (15 mm)
Max Cut Height3.1 in (79 mm)
Deck MaterialSteel
Blades4
Cut Positions10
DischargeCut, Catch, Mulch

Drive

Masport Lawn Marshal ST S18 M&C drive specifications
Drive SystemPush

Dimensions

Masport Lawn Marshal ST S18 M&C dimensions specifications
Weight61 lbs (27.7 kg)
Fuel Capacity0.2 gal (0.9 L)

General

Masport Lawn Marshal ST S18 M&C 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 Lawn Marshal ST S18 M&C.

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).

Power & run time

  • Run time per tank~0.2 h

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.

Run time assumes a typical 1 gal/hour burn at working load; real consumption varies with engine, load and cut.

Source: Masport (manufacturer) · archived copy

Suggest a correction