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1999 GTXi Low Voltage

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dperkinstx

dperkinstx

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In May I picked up a '99 GTXi. We used it a couple times per week for a couple weeks. Then we went on vacation and the Sea Doo didn't get used for a few weeks. The next time we put it in the water the "12V Low" warning was displayed. We ran it anyway. After a 5-minute ride, I killed the engine. When I tried to restart it, the battery was too low to start. I put the battery on a trickle charger and fully charged it. I took it off the charger and let it sit overnight. The next day we put it in the water. The "12V Low" wasn't initially displayed but came on after only a few minutes of riding. I took it out today without recharging the battery. The Sea Doo seemed to run worse and worse through my 30-minute ride.

Is this a battery that won't hold a charge? Or is it something else? Maybe the voltage regulator? Stator not putting out?

Full disclosure: One time the ski was put in the water with the plugs out. The hull may have filled a few inches but we got it out of the water before water got over the motor. I don't think water was high enough to get into anything electrical but I can't be sure. I pulled the Sea Doo out of the water and let it drain. I put the plugs in and ran it with no issues. Just making sure all "12V Low" possibilities are mentioned.

Thanks
 
Charge the battery to full check the voltage, put it back in the ski then run the ski at about 4k revs , check the voltage while doing this , it should go up to 14-15 volts .
 
hi just fixed same fault on my gti rfi it was rectifier/regulator
as BRITRICK says check battery at 4k revs if less than 23.5 volts it is not charging.
check yellow wire from stator should be around 40volts a/c if it is then almost certain to be your rectifier/rectifier
good luck fred
 
Fred, you can also edit a post by clicking "EDIT" at the bottom tool bar of the post.
If you edit it within a minute it won't show up that you edited it :):)
 
Update:

I fully charged the battery using a trickle charger. I started it up and started putting out through the no wake zone. The "12V Low" light came on within a minute or two.

When running the machine at full throttle, it occasionally misses a beat.

If I putt around for awhile, then take off, the motor seems to be "loaded up". It starts off very slow, then cleans up and runs OK. It's like the Sea Doo isn't firing hot enough to burn off all the fuel when idling.

The machine's top speed is a few MPH slower than a month ago - another indicator it isn't firing as hot as it should.
 
You can keep charging the battery and then riding the ski if you want to but that's not gonna fix the problem.

Do as suggested in post #2 and report back.
 
I'm on vacation. I just pulled the PWCs 1000 miles. So if "you can keep charging the battery" is what I have to do to get me through the week, then that's what I'll do. I'll have to wait until I get home to better test things as tools like voltage testers are at home.
 
I found a place in Bristol, TN that checked them out. He said one of them has a bad rectifier. He also said there's an exhaust hose that is leaking. It's one of the 2" rubber hoses. I'll see if the local Sea Doo dealer has those parts in stock tomorrow.

The repair shop said the other ski had a low battery. Hmmm. I put a trickle charger on the battery last night. This morning it showed to be fully charged. He said it wasn't but it's good to go now. What could he have possibly done that charged it better than what I did? If I get the same error next time I put it in the water, is it safe to assume I should put a new battery in it?
 
Your doo should only be pulling power from the battery when you start it, that's it.

A running engine should be making its own power, plus charging the battery on its own, using the stator. If the stator or the retifier is toast, your charging system is not generating enough power, thus sucking down the battery. It's like having a bad alternator on your car.
 
I understand how the charging system works. What I don't understand is: How can I trickle charge the battery all night, see a "full charge" light on my battery charger, take it to the shop, and have the guy tell me nothing is wrong with that particular ski other than the battery is low? And why does his charging the battery work where mine didn't? If the battery isn't holding a charge, I can understand that. If something else is draining it, I get that too. But his diagnosis is the battery is low, nothing else is wrong, even though I charged it all night.
 
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