1990 Johnson 120 over charging

[Coffeeman 59]

My 1990 Johnson 120 outboard has started to over charge when running at speed. What can I do to correct this? Goes over 18 volts, switch on the nav lights and it drops but creeps up same if I use the trim.

 

[ct1762@gmail.com]

My 1990 Johnson 120 outboard has started to over charge when running at speed. What can I do to correct this? Goes over 18 volts, switch on the nav lights and it drops but creeps up same if I use the trim.

1st test battery directly with a simple multimeter to rule out a bad volt gauge. if its still overcharging, the rectifier will need further (simple diode) testing. 90% sure it will need a fresh replacement.

 

[racerone]

Just replace the water cooled voltage regulator.

 

[Coffeeman 59]

1st test battery directly with a simple multimeter to rule out a bad volt gauge. if its still overcharging, the rectifier will need further (simple diode) testing. 90% sure it will need a fresh replacement.

The meter is correct according to my multimeter. Looks like I better take it out of the water and go to work. Thanks

 

[Coffeeman 59]

Just replace the water cooled voltage regulator.

Thanks. I better get it out of the water and go to work. Now to find a parts list for an engine that old.

 

[racerone]

Parts lists are available everywhere online for these motors back to 1968 and back to the 1950's as well.-----evinrudeparts.ca ---Is but one such place.

 

[saltchuckmatt]

1990 is old? Wow.

No need to take boat out of the water....1 hour job or so then joy!

Just fitted this young girl for Mister Estrada!