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Regulator and stator testing on a 96 XP

MAL

Active Member
I am working on a 96 XP. It runs good, but after about a half mile it falls on its face and barely runs. When I shut it off at that point it may or may not crank over. I still get 2 beeps, but no starter engagement or even clicks when I hit the start stop button. It has a new battery and last year a new DESS post and key. I held the start button for about 10 seconds and then suddenly it started to crank over and started up. The start/stop button tests ok. Next I checked the voltage on the battery when it was running, and it only has about 12.4V idling and 12.7V revved up. I have done some testing on the regulator. When I check the voltage coming from the rectifier's red wire, I get no voltage, but when I hit the start or stop, I get a brief voltage spike of up to 19V DC, but no voltage while it s running. With the regulator disconnected I tested for continuity between the 3 yellow wires and the red wire that are potted into the regulator. No continuity between all yellow to yellow wire possibility's. Red to the yellow with the female connector is the only connector combination with continuity...0 ohms. I am not sure what these tests mean, but it seems like the regulator is bad. I then tested the stator. from inside the e-box. yellow to yellow resistance is 1.0 Ohms on all combinations of yellow to yellow and none had continuity to ground I then checked the voltage with it running. With the meter connected to the yellow male connector and to either female connectors I had 52V AC. But female to female I get 0 volts. I am not sure if I am doing these test properly, but it seems that the stator is bad also. I need to confirm my testing procedure and double check my results. This post is a little wordy, but if anybody can help with testing procedure and expected results I would greatly appreciate it.
 
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I retested the yellow stator wires. Now all have 46V AC. Hopefully that means that the stator is good and my test was bad.
 
I think the simplest tests you can do for the regulator is to fully charge your battery, disconnect the red lead from the regulator and run the ski. Since the battery will not be charging you should not go too far or run for a long time but I'm pretty sure you could run for the 10-15 minutes it would take to see if the symptoms you reported don't show up. Also,with the regulator connected you reported only 12.7Vdc at high revs which points to a bad regulator. Sound like the regulator should be replaced and by running without the red wire connected and not getting the issues it would point to those issues being caused by the regulator.
 
I don’t know if 46 AC volts is good or not, I know my ATV was about 60 AC volts, but the reason I posted was to let you know you have a better chance of receiving a reply from someone if you don’t reply to your post. Some people che k posts that have 0 replies, so if you reply to your post then it won’t show in that search. Good luck with the Seadoo, hot as He double hockey sticks today and I was on a roof all day. Corona Time
 
I ordered a regulator. I think the stator is probably ok. I was confused because every regulator failure that I have read about causes high voltage.
 
They don't just cause high voltage. They allow AC voltage to the MPEM that makes it do all kinds of crazy things. When mine went out the voltage showed 12.5V at idle and at 4,500rpm. But the engine would only run on 1 cylinder. I pulled the red wire and the engine came alive on both cylinders and ran perfectly.
 
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