Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 81Get this manual
Starting System Components The starting system consists of the following compo-
Starter Solenoid Test
1Inspect starter solenoid for cracksloose terminals or loose terminal lead connections2Connect ohm meter between terminals of starter solenoid3Connect the BLACK lead from solenoid to battery negative (-) terminal and momentarily connect the YELLOWRED tead to the positive (+) terminal of battery4Verify continuity between the starter solenoid terminals when 12 volts are applied
1Battery
2Starter Solenoid
3Neutral Safety Switch
4Starter Motor
5Ignition Switch
Description
The function of the starting system is to crank the engineThe battery supplies electrical energy to crank the starter motorWhen the ignition switch is turned to "START' position, the starter solenoid is activated and completes the starting circuit between the battery and starter