Voltmeter jumps EVERY 8 seconds...

[ufm82]

Johnson 50hp- 1995 model. When idling, cruising, WOT, whatever, the voltmeter will jump for a split second ( down) and then return to normal. It is literally a jump, like you flicked a switch for a split second. I can count to exactly 8 when it does it and it will do it again. Like clockwork. System seems to be charging now but I have not put a meter to it. Sound like a regulator/rectifier going bad? <br /><br />UFM82

 

[Walker]

Re: Voltmeter jumps EVERY 8 seconds...

Since its like clockwork I would suspect the alarm system. Does your alarm horn work?

 

[backdraft]

Re: Voltmeter jumps EVERY 8 seconds...

ufm 82, disconnect all your accessories, like your radio, depth finder,etc etc. and see if the drop still occurs. nevjb

 

[OBJ]

Re: Voltmeter jumps EVERY 8 seconds...

UFM...do you notice a corresponding jump on the tach also?