1999 Sea Doo saying 12 Volt low.

[GSX99]

So I just installed a stator on my 1999 sea doo and it still saying 12 volt low when I know my battery is fully charged. It will act like it’s trying to start, I will get it to start around the 10th try and still says the 12 volt low. Help

 

[mikidymac]

What the actual voltage when...
1. At rest?
2. When cranking?
3. When reving to 4,000 rpm?

 

[Ckrawiec]

So I just installed a stator on my 1999 sea doo and it still saying 12 volt low when I know my battery is fully charged. It will act like it’s trying to start, I will get it to start around the 10th try and still says the 12 volt low. Help

Things to do:
Get the wiring diagram for your ski !
1) Ski not started or running: Find the 3 wires from the stator (my '96 GTX wires were all yellow, 2 terminated with female bullet connections, 1 was a male bullet connection, all wires terminated in the front electric box in the nose of my ski)...test resistance across all the wires 1-2, 1-3, 2-3.....should be around .6 or at least all equal (or close).
2) Check fuses in the box too....I have a 5V and a 15V fuse directly in the circuit board (ECM/MPEM). Pull, check visually or meter across, re-seat if both check out or replace accordingly. Look for any corrosion.
3) If stator resistance checks OK, reconnect wires to rectifier (order does not matter for the 2 female connections). On my ski, the Red/Purple wire (front) feeds power back to the REAR electric box through a 6 pin connection. I tested the Red/Puple wire for continuity from the front of the ski to the rear pin connection with a long jumper wire. Look at the connection of the 6 pin into the top of the rear box.....check for any corrosion , no matter how slight....clean with baking soda/water solution/gently scrape (tight) as/if necessary.
4) look inside rear electric box.....my ski has a Red/ purple wire through a 15A fuse to the red post of the starter solenoid.....check the fuse, pull and re-seat if good, replace if necessary...check your wires/terminals for clean. Check/tighten any grounds, clean and tight....cover with di-electric grease if handy.
5) Try to start ski.....skis need a good battery charge to turn over...battery greater than 12.6 volts neighborhood. There are many warnings about jumping a jetski battery...but I have had no issues with a standard car battery charger set to START and connected directly to the battery...remove as soon as the ski starts.
6) IF ski starts and runs.....watch battery voltage...should be greater than 13V while running...this tells you stator is good, rectifier/regulator is good, wiring is good, ECM is good.
7) NOTE: The Red/Purple wire also goes to the "infoCenter" to display the 12V low message.....even with a battery voltage of 12.4 V, my ski will say 12V low....but after start (and if everything is functioning properly), the 12V low message will go away and the yellow maintenance light goes out.

Good luck....this problem is a bugger to chase.