Seadoo 3D won’t accelerate

[roma.shuher]

So bought it as a project.
Was bogging and no one could find an issue.

Previous owner changed both injectors
I changed fuel pump
Compression fine (checked it last year, don’t remember what exactly)

On the water it sometimes worked fine, but eventually after a little was going in Limp mode. Also was taking a lot of water inside. So I left it for a year.

This year I figured out leak (2 holes in exhaust)
Thought that’s it.

Now when starting it, it starts ok, but when hit acceleration, it not only would not accelerate, engine starts working worst

Rear spark plug is wet.

So have no clue now what to look at

 

[mikidymac]

What is your fuel pressure? It has to be exactly 107 on the DI skis.

Is yours the 787 or 951?

 

[roma.shuher]

It’s 787. Fuel pressure 6-6.5 bar.
You are saying it should be 107psi on the ramp?

 

[mikidymac]

No, 107 is only for the DI 951 engine.

 

[roma.shuher]

Thanks. Would you know what is it on 787di?

 

[mikidymac]

Check out this thread.......RFI Thread

 

[roma.shuher]

Found what was the issue. Bad connection in air flow meter sensor.

Now have another one)))
It’s not charging battery. Voltage 12.4v. Don’t change when I start & Rev jetski.
What is the voltage should be when it’s running and how to diagnose it’s rectifier or stator? Thanks

 

[mikidymac]

More than likely it is the voltage regulator.
Test is...
Battery voltage at rest with the ski off should be 12.5V.
Battery voltage when cranking to start really should not drop below 11V.
Battery voltage when running and rev it up to 4,000 rpm should be between 13.5-14.5V

 

[Robbo96]

If it’s not putting out 13/14.5 would this point to the problem being rectifier?

 

[mikidymac]

Yes.