peradetlic
Cadet
- Joined
- Apr 10, 2014
- Messages
- 17
Another problem Inoticed on my Bayliner Capri 1987 that I got about 4 years ago:
Ever since I got it, the alternator wouldn't charge batteries (voltage readout about 11v on the dash) until about 5 minutes into driving, then the voltage would go to just shy of 14v. Never bothered me enough, or caused any issues to look into it. (I red in the manual that alternator needs some RPM to start giving power, so i assumed if that was a mechanical circuit it was getting stuck, and needed some heat and vibration to start working )
However, last weekend it wasn't charging at all. I checked "usual stuff" recommended by service manual. And I got puzzled:
Alternator output, that goes to starter and battery measures within the range impedance.
Stator impedance measures pretty high, in megaohms.
When engine is running, there is no charging, battery voltage is the same as before engine was started.
I noticed that voltage from ignition goes through the resistor to the stator. Before the resistor (ignition switch side) there is 12V, but on the stator side there is 2V. Resistor measures 70 ohm
Is this normal? I though that stator is using low current, and that voltage on stator should be 10-12v. Am I wrong here? Is resistor bad? Can I, just for testing purposes, connect 12V to stator to see if it will charge?
It is Paris (something) 60A alternator (I guess Valeo is the same type, with regulator sticking out in the back).
Can this alternator, on this boat, be replaced with "one contact" alternator, self inducing or self polarizing, or whatever it's called.? The one that just connects to the starter/battery, not to ignition switch.
THANKS!
Ever since I got it, the alternator wouldn't charge batteries (voltage readout about 11v on the dash) until about 5 minutes into driving, then the voltage would go to just shy of 14v. Never bothered me enough, or caused any issues to look into it. (I red in the manual that alternator needs some RPM to start giving power, so i assumed if that was a mechanical circuit it was getting stuck, and needed some heat and vibration to start working )
However, last weekend it wasn't charging at all. I checked "usual stuff" recommended by service manual. And I got puzzled:
Alternator output, that goes to starter and battery measures within the range impedance.
Stator impedance measures pretty high, in megaohms.
When engine is running, there is no charging, battery voltage is the same as before engine was started.
I noticed that voltage from ignition goes through the resistor to the stator. Before the resistor (ignition switch side) there is 12V, but on the stator side there is 2V. Resistor measures 70 ohm
Is this normal? I though that stator is using low current, and that voltage on stator should be 10-12v. Am I wrong here? Is resistor bad? Can I, just for testing purposes, connect 12V to stator to see if it will charge?
It is Paris (something) 60A alternator (I guess Valeo is the same type, with regulator sticking out in the back).
Can this alternator, on this boat, be replaced with "one contact" alternator, self inducing or self polarizing, or whatever it's called.? The one that just connects to the starter/battery, not to ignition switch.
THANKS!
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