1993 Mercury 40HP, S/N 0G012038 either not charging, or discharging battery

Joel K

Seaman Apprentice
Joined
Feb 20, 2004
Messages
31
1993 Mercury 40HP, S/N 0G012038 either not charging, or discharging battery

Problem started intermittent (from gauge reading) late last season.<br />I believe I may have a bad rectifier/regulator from checks I made from a Clymer manual, but I am unsure on the stator check.<br />The stator isn't shorted to ground, but I get no reading across the two yellow wires with a digital meter and an old analog I had to borrow, gives me either just a continuity reading or very low resistance.<br /> <br />Should I be getting a reading on the stator with a digital? <br />I'm not sure if I can trust the analog readings against the digital.<br /> <br />If I replace the rectifier and try it without replacing the stator, will it ruin the new rectifier if the stator turns out to be bad? <br />Do they usually go out as a pair?<br />Is there anything else in the charging circuit that I may be overlooking?<br />I already tried a different battery.
 

Clams Canino

Commander
Joined
Jan 10, 2004
Messages
2,179
Re: 1993 Mercury 40HP, S/N 0G012038 either not charging, or discharging battery

Re: 1993 Mercury 40HP, S/N 0G012038 either not charging, or discharging battery

No, usually it's the rectifier. the yellow wires on the stator only have about 3 ohms resistance, looking like almost a dead short.<br /><br />You can easily disconnect and ohm out the rectifier though.<br /><br />-W
 
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