With 20% more power than a 90 size and yet little more weight the 120AX is an absolute powerhouse of an engine for those large models where you don't want to go to the weight and complexity of a petrol engine.
Compact, powerful with legendary OS reliability and quality.
Supplied complete with silencer.
A superb engine that will give years of trouble free life. It is after all an O.S.!
To download a PDF of the parts listing please click here
Spares and Accessories for your O.S. Engine
If you need any spares or accessories for your engine that are not listed on the site please contact us for a price and availability.