Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 42Get this manual

Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 42

15 Amp Stator Test (Alternator Coils Only) NOTE: Stator can be tested with out removing from engine
Troubleshooting 15 40 Ampere Alternator System