2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 373Get this manual
Electrical systems
Rectifier Regulator output peak voltage: Red (R)Black (B) rmin DCV Unloaded 1,500 18.9 3,500 19.5
NOTE: _ After starting the engine, disconnect the output lead (red lead) of the Rectifier Regulator when measuring the output peak voltage