1964 Starflite 75hp Battery voltage when idle

[heryrg2711]

I think my motor is not charging the battery.
What should be the voltage on the battery at idle? Same as on the car 13-14 volts

 

[tx1961whaler]

Re: 1964 Starflite 75hp Battery voltage when idle

It has a stator and regulator, so it should be charging at idle. Check the output of the regulator, which is located in the junction box.

 

[yorab]

Re: 1964 Starflite 75hp Battery voltage when idle

The good news is that the regulator is adjustable--to a point. That is, if it isn't a corroded mess.

 

[heryrg2711]

Re: 1964 Starflite 75hp Battery voltage when idle

Thanks, the regulator looks good. Is there a limit on these old regulators? I think cars output 13.5-14.5v to efficiently charge the battery, outboard should output the same right?

 

[yorab]

Re: 1964 Starflite 75hp Battery voltage when idle

I don't have my manuals with me, so I can't answer that. The voltage is listed in the Factory Service Manual. Perhaps somebody who has the same or similar year can look that up for you.

 

[tx1961whaler]

Re: 1964 Starflite 75hp Battery voltage when idle

From my 1966 manual: With engine @2000-2200 rpm, and ammeter showing 5-10 amps, voltage should be between 14.4 and 15.0 volts

 

[heryrg2711]

Re: 1964 Starflite 75hp Battery voltage when idle

Thanks.