Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 45Get this manual
The following "Starter Ci rcuit Trou bleshooting Flow Chart" is designed as an aid to troubleshooting the starter ci rcuitThis flowchart will accurately locate any existing malfunctionLocation of "Test Poi nts" (called out in flow ch art) are numbered below- -BLACK
BATTERY
STARTER SOLENOID (89-68258)
STARTER
(IF EOUIPPED) (20 AMP FUSE)