Superjet 2004 is not charging

K

Killerpirate

Location
Sliedrecht
Hello,

Recently i fell of my jetski and i wanted to start it back up, but nothing happened, like, really nothing happened. Checken the lanyard switch, batt connection etc etc but nothing worked. Then i bought a new battery and everything worked OK. I thought , o well battery went bad.. Couple days ago the same happened. Fell of, try to start again and nothing happened!! Didnt click, turn over etc. So i checkd the battery voltage while running (with a 3rd battery) and it stays at 12.7V, same as when the ski is off. Opened the e box, bit of corrosion here and there, but nothing looking off.

I measured the résistance between the 2 green wires that comes from the flywheel and the resistance was 1.2 Ohm. The résistancebrtween the 2 wires going into the voltageregulator is 24 MEGA Ohm. Are those numbers as they should be? And why is my battery not charging? Busted voltage regulator? Or could it be something with the flywheel magneto? I read something about a pulsar, lighting coil? Are those the coils inside the ebox? Or are they in the flywheel area?

Thanks!
 
Last edited:
Harbor

Harbor

Location
Stockton
Killerpirate said:
Hello,

Recently i fell of my jetski and i wanted to start it back up, but nothing happened, like, really nothing happened. Checken the lanyard switch, batt connection etc etc but nothing worked. Then i bought a new battery and everything worked OK. I thought , o well battery went bad.. Couple days ago the same happened. Fell of, try to start again and nothing happened!! Didnt click, turn over etc. So i checkd the battery voltage while running (with a 3rd battery) and it stays at 12.7V, same as when the ski is off. Opened the e box, bit of corrosion here and there, but nothing looking off.

I measured the résistance between the 2 green wires that comes from the flywheel and the resistance was 1.2 Ohm. The résistancebrtween the 2 wires going into the voltageregulator is 24 MEGA Ohm. Are those numbers as they should be? And why is my battery not charging? Busted voltage regulator? Or could it be something with the flywheel magneto? I read something about a pulsar, lighting coil? Are those the coils inside the ebox? Or are they in the flywheel area?

Thanks!
Click to expand...

The 12.7 and it being about the same as battery voltage with engine off is not uncommon... look for around a point .2 volt raise with engine on....

Anyways, what was the battery voltage @ when it wouldn’t crank ?

My ski was acting up a couple months ago... no cranking.... interminably... isolated it to one of the 3, start, stop, lanyard, switches...forget which...also starter relay would not close when first jumped then started working..
I had to do both...start stop harness and starter relay... only OE parts

Basically 12v from the fuse goes up to the start stop switches.. if all switches are allow continuity, then 12v is sent to one side of the starter relay..

You’ll have to check at relay as well....
You can test at the In-line connectors by your carbs...

If your battery was actually dead when it wouldn’t start, like 7 v or something then disregard the start stop relay info
 
Last edited:
K

Killerpirate

Location
Sliedrecht
Harbor said:
The 12.7 and it being about the same as battery voltage with engine off is not uncommon... look for around a point .2 volt raise with engine on....

Anyways, what was the battery voltage @ when it wouldn’t crank ?

My ski was acting up a couple months ago... no cranking.... interminably... isolated it to one of the 3, start, stop, lanyard, switches...forget which...also starter relay would not close when first jumped then started working..
I had to do both...start stop harness and starter relay... only OE parts

Basically 12v from the fuse goes up to the start stop switches.. if all switches are allow continuity, then 12v is sent to one side of the starter relay..

You’ll have to check at relay as well....
You can test at the In-line connectors by your carbs...

If your battery was actually dead when it wouldn’t start, like 7 v or something then disregard the start stop relay info
Click to expand...
Thanks for your reply. The battery voltage was around 11 volts when it wouldnt start. But it dropped to 2 volts during cranking. Thats way to low. Right now i am looking for the issue in the coil or regulator. Is there a way to test the coil? And what are the specs of the regulator?
 
Harbor

Harbor

Location
Stockton
There are links to service manuals in the tech facts section If that helps

Iam working and not trying to get all involved, got my own issues right now

I just hate chasing my tail... so I’ll ad make sure you don’t have a parasitic draw on the ski, like a failing bilge pump etc, drawing more power off the system than it can replace...

Verify the new battery isn’t junk

Good luck
 
Last edited:
E350

E350

Site Supporter
Location
Sacramento Delta
Killerpirate: Harbor knows allot more than I do. So listen to him. But just for my edification, would you mind posting up the charging profile for the battery you are using?

You can find the charging profile at the manufacturer's website.
 
mikidymac

mikidymac

Location
California
If you only have 11v when cranking and your battery drops to 2V the battery is bad.
At that low of a voltage you wouldn’t even get a spark.

I have seen plenty of bad brand new Walmart NeverStart batteries do the same thing.
 
K

Killerpirate

Location
Sliedrecht
mikidymac said:
If you only have 11v when cranking and your battery drops to 2V the battery is bad.
At that low of a voltage you wouldn’t even get a spark.

I have seen plenty of bad brand new Walmart NeverStart batteries do the same thing.
Click to expand...

I know that the battery is bad. Thats the reason the ski isnt cranking. But i want to know WHY the battert went bad. Its a new battery, it worked fine, and all of the sudden it stopped working.. so it went bad during my jetski trip. TWICE. Both times were new batteries.
 
K

Killerpirate

Location
Sliedrecht
SXIPro said:
What brand battery?
Click to expand...
Varta. The battery is not the problem in my opinion.

I just replaced the voltage regulator. Before cranking i measured 12.7 V on battery. When i start, it doesnt change. It stays around 12.7 and wobbles up and down. The ski keeps running when i disconnect the batterycables
I measured the resistance between the 2 green wires, it reeds 1.4 Ohm. (Stator side). I also measured the AC voltage coming from the stator. At idle its is around 20V, It goes up when i apply throttle.
 
K

Killerpirate

Location
Sliedrecht
But the weird thing is the new voltage regulator is also showing weird values when i resistsnce test them. Attachment show the values as they should be but all my measurements are in the MEGA Ohm range, on Both my new and old voltage regulator. I checked the new regulator before i placed it in the ski.
Im running out of options here. Really need your help :)
 

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K

Killerpirate

Location
Sliedrecht
Does someone maybe has a good regulator lying around? Could you maybe check the resistances between the wires and post them? Im curious if the values on the attachment in my prvious post are correct
 
E350

E350

Site Supporter
Location
Sacramento Delta
These are very weak charging systems. But a Super Jet should put out 14.3 to15.3 volts depending on rpm.

1595442972885.png


Jet skis have irregular charging which is dependent upon the rpm although it is indeed somewhat regulated.

Some batteries and some types of batteries don't handle irregular charging very well.

Some AGM batteries have very narrow parameters such as constant voltage charging or they will not completely charge or will be damaged.
 
K

Killerpirate

Location
Sliedrecht
E350 said:
These are very weak charging systems. But a Super Jet should put out 14.3 to15.3 volts depending on rpm.

View attachment 398614


Jet skis have irregular charging which is dependent upon the rpm although it is indeed somewhat regulated.

Some batteries and some types of batteries don't handle irregular charging very well.

Some AGM batteries have very narrow parameters such as constant voltage charging or they will not completely charge or will be damaged.
Click to expand...
Its a jetski battery. Made for jetskis, motorcycles etc. Where did you find those values, and why are they different from the values i found?
I measured 1.2 Ohm on green-green from magneto
 
E350

E350

Site Supporter
Location
Sacramento Delta
You know, I would like you better if you changed your user name to PirateKiller . . .

It is from here:
SCAN0115.JPG

Do you know that nowhere in your thread did you actually tell us what make and model ski you have?
 
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