Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 70Get this manual
Table of Contents Page Specifications 28-1 Starter Motor 28-2 Battery 2B4 Precautions 28-4 Recommended Battery 2B4 Operating Engine Without Battery 2B4 Specific Gravity Readings 2B-4 Specific Gravity Cell Comparison Test 28-5 Electrolyte Level 2B5 Charging Discharged Battery 2B5 Winter Storage of Batteries 286 Battery Charging System Troubleshooting 28-6 Battery Charging System 2B7 15 Ampere Charging System 2B7 Description: 28-7 Alternator System Test (6 Ampere Stator) 2B8 Alternator System Test (15 Ampere Stator) 2B9 Stator Ohms Test 2B9 Stator (Battery Charge Coil) 2B9 RectifierRegulator Diode Test 28-10 Starting System Components 2811 Description 28 11 Troubleshooting the Starting Circuit 2B-11 Starter Solenoid Test 2B 11 Starter Motor 2B 14 Removal 2B 14 Disassembly 2B 14 Cleaning and Inspection 2B-15 Testing 2B1 Armature test for shorts 2B-1 Armatu re Test For Ground 2B-15 Checking positive Brushes and Terminals 2B-16 Testing Negative Brushes For Ground 2B-16 Brush Replacement 2B 16 Reassembly 2B 17 Instaliation 2B18