Model L40 is a belt driven 40Amp 14V alternator system for Lycoming engines including alternator assembly, mount- ing hardware & belt, ready to install. The alternator weighs 6.1Lbs & measures 3.9" in dia. & 5.6" long. The model L40 alternator was specifically designed to meet therigorous demands of todays weight sensitive homebuilt designs and has undergone extensive in-flight service testing. This system incorporates the latest state-of-the-art advances in solid state electronic power management as well as incorporating a factory new, modern lightweight alternator. Applicable to Lycoming 118 H.P. through the 300 H.P. engines.