1987 Yamaha WAVE JAMMER Service and Repair Manual

Early machines are the ones where a factory reference matters most, because almost nothing else written about them is reliable. For the 1987 Wave Jammer, coded WJ500H, that reference is Yamaha manual LIT-18616-00-26.

The same book also documents the Wave Runner, and its coverage takes in the 1987 and 1989 model years. Yamaha treated these craft as close enough relatives to service from one volume.

Working on a machine of this age, the sections you will live in are the ones with numbers: torque figures, service limits, and the wiring diagram. The diagnostic procedures are still the fastest route to a fault, and the assembly sequences keep a teardown from turning into a puzzle when it goes back together. Note the part number LIT-18616-00-26 alongside the model code when you are hunting parts, since hull identification is often the only thing a supplier can work from.