1994 waverunner iii 700 no spark

[warrenwnj]

Asking for some hints...

I have a Yamaha wa700 with no spark, been through all the normal things.
Started out as a condition where it would not rev over 3000.
After rebuilding carb, replaced CDI and stator, tried the coil, it was the problem.
Ran great for 10 hrs, ignition died again.

Disconnected kill wire and O-temp sensor.
Have since replaced CDI.
Stator and Coil ohms great, matching yamaha manuals.
Scoped (oscilloscope) charge and pulser coils, wave-forms look reasonable.
Charge coil output is 19V AC on multi-meter, cranking.
Does anyone have experience as to if this is high enough?
I have not tried an OEM CDI, aftermarket only, do they have a good
track record?

Thanks for any input!

 

[QBhoy]

Hi

is that 19v AC before the rectifier ?

 

[warrenwnj]

That's the charge coil, CDI source voltage. It's not the lighting coil that recharges the battery.