Gp 1300r

[Colbyc]

I could use help diagnosing a jet ski it's a 1300 r with a Riva stage 2 kit,
It has no spark so I hooked up the oscillioscope

I'm getting pulse voltage at the ignition coil

My question is how much voltage is needed on the primary side to fire the ignition coil

When reading the scope do I read peak to peak, or max voltage.

The service manual calls for .8 peak volts

If a sensore was telling the ecm not to fire would I get any voltage at the ignition coil

 

[te4250]

Isn't this ski fuel injected? I don't actually know but I would expect it to be a 12v coil controlled by the ecu at that point, where it would be 12v for the dwell time needed by the coil, ballpark like 4ms based on other coils in similar situations, then collapse to ground to fire the coil. so should be more like a square wave between 0-12v on the primary side of the coil. I think if it was a cdi It would be more like 300-400 volts to the primary side so either way that voltage seems way too low.
I have no direct experience with the gp1300 though so I could be completely wrong

 

[Colbyc]

Isn't this ski fuel injected? I don't actually know but I would expect it to be a 12v coil controlled by the ecu at that point, where it would be 12v for the dwell time needed by the coil, ballpark like 4ms based on other coils in similar situations, then collapse to ground to fire the coil. so should be more like a square wave between 0-12v on the primary side of the coil. I think if it was a cdi It would be more like 300-400 volts to the primary side so either way that voltage seems way too low.
I have no direct experience with the gp1300 though so I could be completely wrong

The ski is fuel injected,
my scope shows it as a single pip sine wave so would that mean my voltage is way to low to fire the ignition coil? indicating I either have a weak cdi or stator? what is the minimum voltage needed at the primary side of the ignition coil in order to fire it? if it was a switched ground coil wouldn't i have a solid 12volts with a negative spike to ground?
my theory is that if it was a 12v switched coil and there was no pulse signal or a sensor telling the cdi not to fire i would have no signal at the primary side of the ignition coil just a constant voltage?
the pictures are measurements at each coil on the primary side

 

[Harbor]

I agree with te4250 and also no nothing about your ski. I see no primary ignition switching control (on and off) in your patterns. If it’s coil on plug electronic ignition with a ECU I’d think it would look more like these waveforms. 12v on during saturation then 0 volts when it switches off…

Green hulk might be a better forum for this topic.. I searched and there’s lots of threads with this issue already.. here’s one

GP1300r no spark?? - Greenhulk Personal Watercraft Performance Forums

PWC Performance modification discussion for the 2-stroke Yamaha Waverunners GP1300R and others.

greenhulk.net

 

[Colbyc]

The original picture was hard to see my apologies,
Am I reading my scope wrong and these spikes are not signals from the cdi telling it to fire?
I appreciate the help big time!!

I agree with te4250 and also no nothing about your ski. I see no primary ignition switching control (on and off) in your patterns. If it’s coil on plug electronic ignition with a ECU I’d think it would look more like these waveforms. 12v on during saturation then 0 volts when it switches off…

Green hulk might be a better forum for this topic.. I searched and there’s lots of threads with this issue already.. here’s one

GP1300r no spark?? - Greenhulk Personal Watercraft Performance Forums

PWC Performance modification discussion for the 2-stroke Yamaha Waverunners GP1300R and others.

greenhulk.net

 

[Harbor]

Sorry iam not the right person to help diag your ski, I do not know what kind of ignition system it has as well.. or anything else about gp1300 r’s

I did see the details of your pattern though..

 

[Colbyc]

Sorry iam not the right person to help diag your ski, I do not know what kind of ignition system it has as well.. or anything else about gp1300 r’s

I did see the details of your pattern though..

No worries thank you for your help,

 

[vomitspot]

Put some slack in the throttle cable , check the lower pipe sensor in front of the waterbox

 

[Colbyc]

Put some slack in the throttle cable , check the lower pipe sensor in front of the waterbox

Will do thank you,

 

[WFO Speedracer]

Several things it could be , tilt switch , throttle sensor, temp sensor all will make it not fire ,that is why Jason said put some slack in the throttle cable , if it senses the throttle is open at all it will not fire. the tilt switch you can unbolt it and check it out, the temp sensor is a fairly easy part to replace but the throttle sensor comes with the throttle body, I do have a spare one here if you happen to need one.

 

[Colbyc]

Several things it could be , tilt switch , throttle sensor, temp sensor all will make it not fire ,that is why Jason said put some slack in the throttle cable , if it senses the throttle is open at all it will not fire. the tilt switch you can unbolt it and check it out, the temp sensor is a fairly easy part to replace but the throttle sensor comes with the throttle body, I do have a spare one here if you happen to need one.

Thanks for the response, I havenot had time to diagnose any further hopefully this weekend,
I noticed in the wiring diagram all the sensors you mentioned go into a plug as well as tied to the stator which made me wonder if they would control spark somehow so that's good to know, I will report back with some findings thank you

 

[iker2266]

I could use help diagnosing a jet ski it's a 1300 r with a Riva stage 2 kit,
It has no spark so I hooked up the oscillioscope

I'm getting pulse voltage at the ignition coil

My question is how much voltage is needed on the primary side to fire the ignition coil

When reading the scope do I read peak to peak, or max voltage.

The service manual calls for .8 peak volts

If a sensore was telling the ecm not to fire would I get any voltage at the ignition coil

I have same problem... Did you find the problem

I could use help diagnosing a jet ski it's a 1300 r with a Riva stage 2 kit,
It has no spark so I hooked up the oscillioscope

I'm getting pulse voltage at the ignition coil

My question is how much voltage is needed on the primary side to fire the ignition coil

When reading the scope do I read peak to peak, or max voltage.

The service manual calls for .8 peak volts

If a sensore was telling the ecm not to fire would I get any voltage at the ignition coil

I have the same problem as you, do you know how to fix it?

 

[iker2266]

I have the same problem as you, do you know how to fix it?

 

[iker2266]

I have the same problem as you, do you know how to fix it?

 

[CARBONX2]

CDI and stator failure are rare. Spark problems are normally related to exhaust temp sensors or the throttle-body switch not activated at the closed position

 

[WFO Speedracer]

I have one of those throttle body switches for sale if you determine that to be your issue.

 

[Myself]

I can tell you for sure that if the throttle on a GP1300r is adjusted too tightly and opened a little bit it WILL NOT fire.

 

[WFO Speedracer]

I can tell you for sure that if the throttle on a GP1300r is adjusted too tightly and opened a little bit it WILL NOT fire.

Yes it's pretty much the same on any fuel injected Yamaha watercraft, I did a VX1100 one time that had a piece of string caught up in the throttle so it wouldn't close all the way, symptom, no spark.

 

[19025 rba]

Hello, I introduce myself, my name is Alex, I am from Spain and looking at the forum I have the same problem, does anyone know how to solve the issue of not having spark. I did a repair on it and after having everything assembled there is no spark to start it . I would be very grateful for your help