Valach by Fiala VM 250 R5-4T WITH STARTER and electric fuel pump included

We hope to have the starter version in stock with our next batch coming in January 2024


Fiala, the manufacturers of the Valach engines, are a company that caters to the military; hence this is military grade equipment under constant development, it is and always will the most advanced engine manufacturer on the market.

At the moment we carry over 20 different models of Fiala engines.

Please contact for customized and lower shipping rates for shipping outside the US.


Valach by Fiala 250cc 5 cylinder gas radial 4stroke engine with electronic ignition

This is the deluxe 250 class radial, the complete motor is CNC milled.

COMES WITH the APS made FuelPump already included, a US$ 245 value!



This motor has been designed from the ground up for fuel pump usage, the Fiala/APS fuel pump is already included (US$250 value).

Enclosed valve train

Laser welded stainless steel exhaust ring which allows those of us who want to make custom exhaust solution (scale exhaust port location for our scale builds) much easier to achieve, soldering steel is easy.

Smart ignition - 4.5V to 9V, acoustic status feedback. The ignition will monitor your RPM at startup, you simply can not start the motor at full RPM by mistake.

The large motor mount allows for easy install using standoffs - or direct mount to your firewall.

Comes with replacement parts - 5 valve cover gaskets, 2 adjustment bolts, 1 cam follower)

Comes with tools

Comes with two metal Valach Logo plates

Original Walbro carburetor




Bore 42mm

Stroke 32mm

302mm diameter

193mm length

Weight TBA


Fiala is the only 4-stroke company in the world which produces both the engines and the propellers developed and designed to be used with them. They go hand in hand.

The Fiala propellers have quickly become a staple in the global UAV industry as no other propeller matches their efficiency.

Hence it is important to run the Fiala propellers with the Fiala engines should you want to run the diameters and pitches shown in the Fiala manual. These specifications are based only, and I cannot stress that enough, on their purpose designed and built Fiala propellers.

Other brands run the risk of over torquing and stressing the engine unnecessarily, limiting performance and service life.


Recommended props:

32 x 20 Fiala 2blade

34 x 18 Fiala 2blade

30 x 20 Fiala 3blade

32 x 18 Fiala 3blade