rectifier

can some on tell me which wire out of the rectifier to check for voltage
1993 johnson 175

Re: rectifier

Put your voltmeter on the battery terminals with the engine off and take a reading. Then take a reading from the same place with the engine running.


For more troubleshooting on the regulated rectifier, see Joe Reeve's comments in the Engine FAQ:

http://forums.iboats.com/showthread.php?t=190636

Re: rectifier

12.15 when off and 12.20 when runing

Re: rectifier

Not running voltage doesn't mean a thing, other than there's a battery there. Less than 13.5 or 14 VDC means a) rectifier smoked and/or b) stator smoked and/or c) wiring not good.

Start by measuring AC voltage from stator. Should typically be over 25 VAC. If not, replace stator and check again for good running DC at battery terminals. If over 13.5 VDC, you're good to go. If not the regulator/rectifier needs replacing also.

Be sure to note the difference between AC and DC above.

Regulator/rectifiier is the most common failure, but don't assume it's that without checking, unless you have a penchant for replacing parts.

Consult a shop manual fur where to check voltages.