Live Steam 
Twin Cylinder "Marine" Model Steam Engine 
Fully Machined Kit in Brass, Bronze & Steel 


The vertical twin cylinder "marine" engine is a simple design, yet retains the basic mechanics of engines which powered boats, farm equipment, and workshops in the nineteenth century.

NOTE: Some of the pictures are of the assembled, painted and polished model. This listing is for the kit of parts, see picture, not painted or polished.

The marine engine layout has two double acting cylinders, eccentric driven slide valves and the brass flywheel offers smooth running and is capable of powering a range of accessories, in a variety of roles. The engine also includes triple split bronze pedestal bearings for the crank shaft, tube sliders and a substantial cast base.

On the twin crank shaft, the cranks for each cylinder are offset by 90° which means the engine will self-start in any position.

The engine will run in reverse by applying the steam (or air) input to the outlet ports. Our Reversing/Throttle Valve (optional extra) will control the direction and speed of the engine in either direction.

The kit consists of precision produced parts each carefully made and checked to ensure ease of assembly and reliability in service.

The cylinder assembly and piston are manufactured from brass and the piston shaft, connecting rod, column screws and valve from stainless steel so are not susceptible to the corrosion. The piston shaft passes through an adjustable gland and the steam inlet can be on the front or back of the chests.

To accommodate more confined spaces, e.g. in a boat, see the 15mm short version of this engine.

Detail Specification:
- Type: Tube Slider
- Bore: 14mm
- Stroke: 18mm
- Flywheel Diameter: 56mm
- Valve type: Piston
- Height: 160mm
- Length: 110mm
- Width: 75 mm
- Weight: 1.7Kg
- Connections: 1/4" x 40 tpi ME

The kit consists of a set of fully machined parts that can easily be assembled using simple tools such as a screw driver, allen keys, pliers and metal file. The parts are mainly unfinished metal and will also require painting, polishing, filing, etc. to achieve the appearance shown in the pictures.

NOTE: The kit is supplied with slot head screws (as per the pictures) but socket and hex head screws are available as an option. Some screws as provided may need to the cut or filed to length to complete the model.

Other options also available including a Manifold set which combines the two inlet or outlet ports together into a single port.

When assembled the engine is fully working and can be run using steam or simply using compressed air e.g. from hand or foot pumps.

To power the engine with live steam, connect it to one of our Model Steam Boilers.

Vertical Marine Twin Cylinder Engine Kit

  • Product Code: VTA2
  • Availability: 36
  • £235.00


Available Options


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Tags: Live Steam, Model Steam Engine, Fully Machined Kit, Twin Cylinder, Marine Engine