1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 84Get this manual
10A reading of 14 amperes at 5000 RPM indicates the charging system is functioning properlyThe battery being discharged is due to the amperage draw on the system being greater than the amperage output of the engine charging system11If ammeter reads less than required amperes 5000 RPM, test the stator; refer to "Stator Ohm Test (Alternator Coils Only)"If stator tests OK, replace voltage regulator d a