Technicopedia
“It features instructions for 4 different engines: a 3 cylinder inline engine, a V6 engine, a 6 cylinder horizontally opposed (Boxer) engine, and a 2-cycle engine. Ironically, this last engine can not be considered either 2 or 4 cycle because there are no valves or transfer... More ports, making the term meaningless. All of the engines feature reciprocating rectangular pistons, spark plug wires, and belts. Other features vary by model.”
Full review at www.technicopedia.com