2si 540
I-2 PISTON AIRCRAFT ENGINE
Two Stroke International 540; Cuyuna 540; AMW 540; 2si 500; 2si 500L85; 2si 500 L-85; Cuyuna 500; AMW Cuyuna 500; AMW 500L-85
The 2si 540 and 2si 500 are a family of in-line twin-cylinder, liquid-cooled, two-stroke, dual ignition, aircraft engines that were designed for ultralight aircraft.Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page G-2 Cybair Limited Publishing, 2001.