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Masport 400 ST 3'n1 Self Propelled

Push / Walk-Behind mower · Model 561792 · Residential-duty · Gas

A$779 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 400 ST 3'n1 Self Propelled is a residential-grade gas walk-behind mower, suited to small-to-mid home lawns, with a 18-inch deck and a 159cc engine. It weighs 78 lb (35.4 kg).

At a glance

Power Source
gas
Cutting Width
18.1 in (460 mm)
Displacement
9.7 ci (159 cc)
Weight
78 lbs (35.4 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.
  • Honda HRG466
    Deck 460 mm (18.1 in) · 145 cc · RRP A$849
    Weight 32 kg (71 lbs) (this model: 35.4 kg (78 lbs))Displacement 145 cc (8.8 ci) (this model: 159 cc (9.7 ci))
    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 400 ST 3'n1 Self Propelled ›
  • Bushranger 46TL4M Mulch & Catch Lawn Mower
    Deck 457 mm (18 in) · Air cooled, single cylinder, OHV, vertical shaft, normally aspirated petrol four stroke engine, 139 cc · RRP A$469
    Displacement 139 cc (8.5 ci) (this model: 159 cc (9.7 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 400 ST 3'n1 Self Propelled ›
  • Victa 18 in Corvette 300 Steel Base, Mulch or Catch Push Mower
    Deck 457 mm (18 in) · Briggs & Stratton, 150 cc · RRP A$699
    Weight 32.3 kg (71 lbs) (this model: 35.4 kg (78 lbs))Displacement 150 cc (9.2 ci) (this model: 159 cc (9.7 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 Victa, a different maker
    Compare with the 400 ST 3'n1 Self Propelled ›
  • Bushranger 46TK6IMSP Self Propelled Lawn Mower
    Deck 457 mm (18 in) · Air cooled, single cylinder, OHV, vertical shaft, normally aspirated petrol four stroke engine, 149 cc · RRP A$769
    Weight 31 kg (68 lbs) (this model: 35.4 kg (78 lbs))Displacement 149 cc (9.1 ci) (this model: 159 cc (9.7 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 400 ST 3'n1 Self Propelled ›
  • Victa 18 in 725 Steel Base Utility Mower
    Deck 457 mm (18 in) · Briggs & Stratton, 163 cc · RRP A$889
    Weight 26.5 kg (58 lbs) (this model: 35.4 kg (78 lbs))Max cut height 65 mm (2.6 in) (this model: 75 mm (3 in))
    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 400 ST 3'n1 Self Propelled ›

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 400 ST 3'n1 Self Propelled engine specifications
Power Sourcegas
Displacement9.7 ci (159 cc)
Start TypeAuto Choke
Engine MakeMasport
Engine ModelSeries SEVEN IC

Deck

Masport 400 ST 3'n1 Self Propelled deck specifications
Cutting Width18.1 in (460 mm)
Min Cut Height0.6 in (15 mm)
Max Cut Height3 in (75 mm)
Deck MaterialHeavy Duty Steel
Blades4
Cut Positions10
DischargeCatch, Mulch, Rear Discharge

Drive

Masport 400 ST 3'n1 Self Propelled drive specifications
Drive SystemSingle Speed Self Propelled

Dimensions

Masport 400 ST 3'n1 Self Propelled dimensions specifications
Weight78 lbs (35.4 kg)

General

Masport 400 ST 3'n1 Self Propelled general specifications
Bagger Capacity1.4 bu (50 L)

Similar models

Other push / walk-behind mowers with comparable specs — including other brands — that buyers cross-shop with the 400 ST 3'n1 Self Propelled.

Drive 19 19 in Cox · 19 in (483 mm)
Push 18-KS 18 in Cox · 18 in (457 mm)
Commercial-grade 60V lawn mower Kress · 18.5 in (470 mm)
19 in Mustang, Alloy Base, Mulch or Catch Self-Propelled Mower Victa · 19 in (483 mm)
Push 19A 19 in Cox · 19 in (483 mm)
19 in Corvette 400, Steel Base, Mulch or Catch Self-Propelled… Victa · 19 in (483 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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