JD-15 S83-S100-S110-S120-S130-S140 660cc Series: This is the new full mechanical version loaded with hundreds of easy to follow picture diagrams and explanations written in plain and easy to understand English. Identify your vehicle and decode all main items! Vehicle-Engine-Transmission-Differential & More! Rebuild your engine, change a clutch. Troubleshoot your engine, and find a part you need. Locate where parts are located!