The need for electrical energy by society and industry has encouraged research to build electricity generation from new and renewable energy. The sea is a source of renewable energy, especially ocean wave energy. Mechanics for the design and construction of a floating system ocean wave power plant is a power plant that utilizes ocean wave energy with a two-floating system equipped with various components aimed at producing electric power. The aim of this research is to design and manufacture the mechanics of a sea wave power plant. The techniques used in making mechanical components are welding, cutting, smoothing, drilling and dynamo installation. The results obtained from this research are to design and build a mechanical system to produce ocean wave electricity. As a result of equipment testing in the mechanical systems lab, this wave power generator succeeded in lighting electric lights with an electric current output of around (0.01 – 0.02) Ampere and a voltage of (2.70 – 4.90) Volts with a float height of between (30 – 100) cm.