1988 Mercury 100, 4 cyl 2+2 - voltage problem?

[donmanning121]

Can anyone tell me what voltage the regulator is supposed to deliver?<br /><br />I'm getting 13.5 at idle and 14 at 1000 rpm. Then I get higher and higher readings when wide open - 15 to 16 volts.<br /><br />None of my gauges seem to work correctly - trim and temp never move - tach sometimes reads 1000's high - even voltmeter is off.

 

[Spidybot]

Re: 1988 Mercury 100, 4 cyl 2+2 - voltage problem?

16 volts sounds too high. Does not have the manual with me, but if my memory serves me you should have close to 14...<br /><br />I'll look into it later - how is your battery? Getting hot when you're running? The 16v is above the normal operating power for your gauges (not the voltmeter, ofcourse) and may be a hazard to other equipment as well.

 

[donmanning121]

Re: 1988 Mercury 100, 4 cyl 2+2 - voltage problem?

Never mind. I moved this over to the right forum.

 

[donmanning121]

Re: 1988 Mercury 100, 4 cyl 2+2 - voltage problem?

Ooops! I didn't see that someone had replied before that last post. Thanks for the tip. I haven't noticed heat in the battery- but I think I am going to replace the regulator because that may solve several problems. Otherwise this motor has been marvellous!!