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weak spark

  • Thread starter Thread starter Master077
  • Start date Start date
I found burn and melted wires coming from the stator and r&r.
 
That's what happens when corrosion gets into the connections. Read the stator papers.
 
If it drops to 8 volts the battery needs to be re charged !!!!
 
Master077 said:
I did you quick test

*key off................12.46

2.)*key on*(but not cranking with lights for 10 sec).....
12.1

3.)*at idle*(1500 rpm)..... 12.4

4.)*at 2500 rpm*13.67

5.)*at 5000 rpm.....13.20

6.)*12.00
would this be a stator or a rare problem? Or do I need to do more testing?
Click to expand...

The battery seems fine (maybe a little cold) but you do have charging problems.

If you re-read the diagnosis area of the Quick test. you Will see that the difference between 1.) and 2.) is a mini load test to see how good your battery is. 2) assumes you have the headlamp connected as it is a quickie test not requiring any disassembley.

3) shows you are charging some at idle enough to pull the battery back up to level from step 1)

4) shows that you have reasonable charging and in the "old days" some would even say you were OK.

However it is 5) v.s. 4.) which shows with increasing RPM your charging voltage folded back. That is a clear indication there are dirty connections between the battery and the R/R.

6) shows that the net result of cranking, and revving up your engine to do the test that you lost charge in the battery. This is an independent test to confirm the other diagnosis.

You will usually find you can improve this by adding additional ground (battery and frame) but there will probably still be residual voltage fold back on the positive connections.

You should clean all R/R connections and follow the grounding recommendations in GS Charging health and then rerun the Quick test to make sure it is better and then proceed to the Revised Phase A tests of the stator pages. You will find it at the same link. There you will measure the actual voltage drops across the leads while charging at max current. Should be less than 0.25V (max) I prefer 0.1 or less myself.

One last word, your measurements are better than most for a mis-cared for charging system.
 
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