Mercury Mariner 4 and 5HP 4-Stroke Outboards Service Shop Manual 1999, Page 69Get this manual
CHARGING SYSTEM
WIRING DIAGRAMA" Rectifier Kit Installation
aAlternator Kit (t 6837A2) b- Rectifier c- Fuse Holder with 10 Amp Fuse d- Extension Harness22 in(56 cm) Long e- Battery Harness69 in(175 em) LongBattery
Battery Connections
ACAUTION
Failure to observe correct polarity when connecting battery harness leads to battery, will result in damage to the charging systemHouse battery in battery box and secu re in favorable position in boatConnect red battery harness lead to positive (+) battery terminal and black battery harness lead to negative (-) battery terminal