Logo

1987 120hp J120TLCU charging system and tach

smcc59

New member
Hello,
I picked up a 1987 120 hp looper. The previous owner was a tinkerer and this thing has a few problems left in it.
The charging system is not working. When it runs at idle the volt meter is all over the place. When I give it a little gas, the meter settles out. The tach reads higher than what it runs at and is not even close to accurate. I changed out the voltage regulator/rectifier with a known good one. The tach worked, but the charging system is still out. Any help is appreciated.
 
Re: 1987 J120TLCU charging system and tach

Hello,
I picked up a 1987 120 hp looper. The previous owner was a tinkerer and this thing has a few problems left in it.
The charging system is not working. When it runs at idle the volt meter is all over the place. When I give it a little gas, the meter settles out. The tach reads higher than what it runs at and is not even close to accurate. I changed out the voltage regulator/rectifier with a known good one. The tach worked, but the charging system is still out. Any help is appreciated.
What are you using to ascertain your charging system is NOT working? Tester? Gauge?
Using a multi meter set to DC on the battery + and - pole with a slow increase of rpms you will see the volts increased from 12V DC to 13/14 VDC .....
Here you go Bud ..
http://forums.iboats.com/showthread.php?t=190636
 
Last edited:
Back
Top