Order Includes: 1x Regulator Rectifier. Compatible with Mercury Mariner models: 200 HP 1992-1999, 250 HP 1989-1990, 275 HP 1989-1994. Note: 6-Wire type, the extra wire is for the ground.. Terminal ID: Gray Tach, Yellow AC, Red (Female) Sense / Red (Male) B+, Black B-, Yellow AC. We strongly suggest comparing the posted picture to the unit(s) that needs to be replaced..
