The M25Y is a single-cylinder two-stroke, 1731NaN1 displacement, air-cooled, petrol engine design, with a poly V belt reduction drive. The reduction drive has optional reduction ratios of 2.2:1, 2.3:1, 2.5:1, 2.6:1, 2.7:1 and 2.88:1. The M25Y employs a single capacitor discharge ignition, a WB37 diaphragm carburettor and produces 210NaN0 at 7900 rpm. The weight is 14.41NaN1 including the exhaust system.[1] [2]
The engine has a centrifugal clutch that stops the propeller spinning when the engine is operated at low RPM, a safety feature for use in powered paraglider applications.[2]