charging Issues

[BadBoy]

Hello I have a 1996 Johnson 130HP outboard and it does not seem to be Charging.<br />I have replaced the Rectifier and the Stator and still I only get 11.9 (DC) volts or 12.0 (DC) volts at the battery and on my deep recorder and also at the solenoid ( it shows the volts).<br />I have checked and triple checked the wire's and they are all hooked up right and none are bad the Battery cables are only 3 weeks old and the battery's are not that old maybe 4 months.<br />This thing is driving me crazy what else could be wrong.<br /><br />Also I tried measuring the volts that came from the Yellow stator wire and only got 6.0 DC Volt's is this normal.<br />And in the in the factory manual it says that the magnet's in the flywheel could be bad how often does this happen.<br /><br />Thanks<br />BadBoy

 

[wilde1j]

Re: charging Issues

What's the AC voltage from the stator to the regulator/rectifier?

 

[BadBoy]

Re: charging Issues

Originally posted by WildeOne:<br /> What's the AC voltage from the stator to the regulator/rectifier?

It was 6volts DC voltage will check it agian with the meter set to A/C In awhile.<br />What should it be reading At AC Voltage.<br /><br /><br />Thanks<br />BadBoy

 

[Xcusme]

Re: charging Issues

Voltage from the stator to the rectifier (Yellow wires) is AC voltage.<br />Voltage from the rectifier (Red wire) to the battery is DC voltage.<br /><br />The AC voltage will vary with motor RPM's<br />The DC voltage will vary with motor RPM's UNLESS you have a rectifier/regulator, then the DC voltage should be pretty constant around 13.8.

 

[BadBoy]

Re: charging Issues

Originally posted by Xcusme:<br /> Voltage from the stator to the rectifier (Yellow wires) is AC voltage.<br />Voltage from the rectifier (Red wire) to the battery is DC voltage.<br /><br />The AC voltage will vary with motor RPM's<br />The DC voltage will vary with motor RPM's UNLESS you have a rectifier/regulator, then the DC voltage should be pretty constant around 13.8.

Ok I just Checked the AC Voltage at the yellow stator wire and it read 9.volts @1100 rpm and 12volts @2000 rpm is this normal or is the stator not working.<br />And checked the red wire coming form the rectifier/regulator and it only show's 12.volts @ any speed.<br /><br />Thanks<br />BadBoy

 

[wilde1j]

Re: charging Issues

That's not very good AC voltage, since the reg/rect converts the AC to square wave DC AND the voltage isn't going any higher than the souce. You need at least 18 to 30 V AC for the charging to work. What you found suggests the stator is bad. Use the shop manual and check the specified resistances with a VOM.<br /><br />If you don't have an OEM shop manual, I suggest you get one.

 

[BadBoy]

Re: charging Issues

Originally posted by WildeOne:<br /> That's not very good AC voltage, since the reg/rect converts the AC to square wave DC AND the voltage isn't going any higher than the souce. You need at least 18 to 30 V AC for the charging to work. What you found suggests the stator is bad. Use the shop manual and check the specified resistances with a VOM.<br /><br />If you don't have an OEM shop manual, I suggest you get one.

Thats a brand new stator i put on with a brand new Rectifier.<br />What is the chance the flywheel magnets are bad.<br /><br />Thanks<br />BadBoy

 

[BadBoy]

Re: charging Issues

I just tryed a differnt FlyWheel and it still not putting out a charge.<br />This thing is driving me crazy not sure what it could be wrong i replace all three charing thins and still no charge.<br /><br /><br />Thanks<br />BadBoy

 

[wilde1j]

Re: charging Issues

You MUST have more than 12 VAC from the stator to charge. Recheck the AC voltage and let us know.

 

[BadBoy]

Re: charging Issues

Originally posted by WildeOne:<br /> You MUST have more than 12 VAC from the stator to charge. Recheck the AC voltage and let us know.

I get 9. volts AC @ 900 rpms then it go's up to about 14. Volts AC when revving the engine.<br /><br />Also I changed the Battery and i can get the volt's to go to 12.9-13.0 volt's while revving but it claims slowly.<br /><br />Thanks<br />BadBoy

 

[wilde1j]

Re: charging Issues

14 VAC is not so hot either. Use your manual and check the stator ohms.

 

[Seasport]

Re: charging Issues

What makes you think it's not charging - does your battery continue to go flat?<br /><br />To be sure you could measure the DC charging current. I think there's a 9amp current output on that stator. You'll need to hook up a DC ammeter capable of reading up to 10A. Disconnect the red wire output from the regulator from the battery side of the solenoid and place the meter in the circuit between the ddisconnected red wire and ther terminal where it was connected. You should read a DC current which varies with RPM up to about 9A at about 2500rpm. The current does depend on the charge state of the battery so it's best to discharge the battery for a while first.

 

[wilde1j]

Re: charging Issues

Way easier ... just measure voltage across with motor running. If it's not over 13 vdc at idle, no charge. No need to measure current.

 

[BadBoy]

Re: charging Issues

Well I still cant get this thing to charge.<br />I replaced the battery and got the Voltage to go as high as 13.2 volt's @ 4000 RPM but if I run the live well pump the voltage drops back down to 12.4-12.0 Volts<br />Then when i got home it wont Even go to 13 Volts now.<br />I thinking that I bought a bad stator but the place i got it from wont take it back so i would have to spend another $250.00 dollar's and that still might not be the problem.<br /><br />Also in the OEM shop manual it say to check the Ohms on the yellow wire i did and got 1.0 ohms the book say it should be 0.7 plus or minus 0.05 so I think it's in range.<br />Then it says to check the two wire plug that comes out of the stator and it should read infinity but mine has nothing.<br /><br /><br />This thing is Driving me nut's<br /><br />Thanks <br />BadBoy

 

[BadBoy]

Re: charging Issues

Originally posted by BadBoy:<br /> Well I still cant get this thing to charge.<br />I replaced the battery and got the Voltage to go as high as 13.2 volt's @ 4000 RPM but if I run the live well pump the voltage drops back down to 12.4-12.0 Volts<br />Then when i got home it wont Even go to 13 Volts now.<br />I thinking that I bought a bad stator but the place i got it from wont take it back so i would have to spend another $250.00 dollar's and that still might not be the problem.<br /><br />Also in the OEM shop manual it say to check the Ohms on the yellow wire and yellow with grey stripe coming form the stator i did and got 1.0 ohms the book say it should be 0.7 (plus or minus 0.05) so I think it's in range.<br />Then it says to check the two wire plug that comes out of the stator and it should read infinity but mine has nothing.<br /><br /><br />This thing is Driving me nut's<br /><br />Thanks <br />BadBoy

 

[BadBoy]

Re: charging Issues

Well I still cant get this thing to charge.<br />I replaced the battery and got the Voltage to go as high as 13.2 volt's @ 4000 RPM but if I run the live well pump the voltage drops back down to 12.4-12.0 Volts<br />Then when i got home it wont Even go to 13 Volts now.<br />I thinking that I bought a bad stator but the place i got it from wont take it back so i would have to spend another $250.00 dollar's and that still might not be the problem.<br /><br />Also in the OEM shop manual it say to check the Ohms on the yellow wire and yellow with grey stripe coming form the stator i did and got 1.0 ohms the book say it should be 0.7 (plus or minus 0.05) so I think it's in range.<br />Then it says to check the two wire plug that comes out of the stator and it should read infinity but mine has nothing.<br /><br /><br />This thing is Driving me nut's<br /><br />Thanks <br />BadBoy

 

[Seasport]

Re: charging Issues

I'm still not convinced that you're not charging. What other evidence do you have that it is not charging?<br /><br />13.2V is maybe a bit low but you should still be charging the battery at this voltage. The output voltage of the regulator (and charging current) will depend on the battery state. The voltage on my boat is quite often around 13.2V at say 4000rpm.<br /><br />The definitive way to find out if it is charging is to measure the current as I suggested. You need to do this with a somewhat discharged battery.<br /><br />Does your regulator have a purple wire as well as a red wire? Is this connected to your switched 12V source?<br /><br />An infinite resistance should show nothing on a meter (as opposed to zero ohms which will show 0).

 

[wilde1j]

Re: charging Issues

If he runs the motor @ 4000 RPM and the voltage is "down to 12.4-12.0 Volts", it's clearly NOT charging. A normal, fully charged battery should read a static 12.68 vdc. Any less than that w/o a big load and it's not charging.<br /><br />It's nice to measure amps, but if you open circuit with the motor running you're going to fry something, typically the reg/rect. BTW, I don't have the charging specs for that motor, but it may be more than 10A. Most of the older V4's and V6's had 6 or 9A charging systems. This one may be more. BTW, most VOM's are not capable of directly reading amps, only mA's, which means you must use a shunt of appropriate resistance value, and measure the voltage drop across the shunt, then calculate the current. Usually too much trouble.<br /><br />"two wire plug that comes out of the stator and it should read infinity but mine has nothing" Not sure what you mean here. Do you mean zero or a very high value?

 

[BadBoy]

Re: charging Issues

Originally posted by WildeOne:<br />"two wire plug that comes out of the stator and it should read infinity but mine has nothing" Not sure what you mean here. Do you mean zero or a very high value?

Well It does nothing to the meter now when i check the yellow wire's i get 1.1 OHMS but when I try the two wire plug like the shop manual says I get nothing the meter dont move one bit.<br /><br />Also took the boat out diving today and the battery was reading 11.8-12.2 all day.<br /><br /><br />Thanks<br />BadBoy

 

[Seasport]

Re: charging Issues

I think it's a 9A stator Jim. Yes and of course you don't open the circuit while the motor is running. You hook it up and then run the motor.<br /><br />I come back to the question - how do you know the battery isn't charging Badboy? Is there any other evidence other than your voltmeter reading? Does your battery go flat? Just maybe your voltmeter is reading incorrectly. Have you tried reading the battery voltage with another meter?<br /><br />Infinite ohms will give you the same reading as if the meter probes are sitting in mid air, i.e. the meter will do nothing.<br /><br />Are you sure you have hooked up the regulator the right way? Have you checked the stator windings have no connection to ground? You've replaced everything in the circuit except the battery. Maybe you shoud try another battery!