2000 Seadoo 951 Sportster - No Spark

[Airman89]

Hey everyone I have no spark on a Seadoo boat I bought with the 951 carbureted.

I’ve replaced,

Stator and pickup
Entire electric box (coils, wires, boots, plugs)
Sanded the contact points on magneto

- I am getting no voltage to white wires that go to coils.
- Pickup ohms at 260.
- Grounds are intact and clean.

How many rpm’s should be read on tach when cranking? I get about 50.

I noticed the new stator/pickup combo I bought has 6 pins but on the plug from my MPEM I only have 5 pins. One pin has a plug in it? I have three yellow and the other two wires are for the trigger but what is the 6th?

 

[Airman89]

Any ideas?

 

[POPPS]

,,,if the trigger is good,,,and no signal from the cdi,,,(white)…then maybe the cdi is faulty?

 

[Airman89]

,,,if the trigger is good,,,and no signal from the cdi,,,(white)…then maybe the cdi is faulty?

I think the CDI is integrated into the MPEM on this. I looked for the CDI but couldn’t find one. Thanks for reply. The trigger ohmed good but I’m still not sure if it’s picking up a signal. Today I had 10.9 volts at the white wire at the coils but now for some reason I’m down to getting 2volts while cranking. I’m not sure how this could change. I’ve re checked all connections and everything is tight and clean. I went through MPEM female side of pins and even tightened them..

 

[Airman89]

Does anyone know how to test to see if the pickup coil is sending a signal? (Besides testing the white wire at the rear box. I’m trying to make sure the MPEM is at least getting the signal from the pickup. The pickup coil ohms good but I want to make sure it’s sending a signal.)

 

[POPPS]

You pretty well have covered all the bases…you have replaced the trigger pickup,,,stator,,,which will not affect the pulse signal,,.so…I can only surmise the cdi…which is built in unfortunately…is the culprit,,.

 

[Airman89]

Thanks for the replies man I really appreciate it! Would the CDI still be the culprit if I am receiving 11.9volts to the ignition coils? The white wires from the MPEM to ignition coils now read 11.9v after some more tightening of connections and connectors.

 

[Airman89]

 

[Airman89]

I took the cover back off to take a look and see if I see anything. With the rotor looking like this, would there be any signal issues? Also, this is a Denso rotor but I have an aftermarket Arieltek MPEM (previous owner replaced.). Would this be causing an issue? I have 4 protrusion points on the rotor and I have a 2 coil ignition system. Thanks.

 

[Airman89]

 

[Airman89]

Is this too much distance between the pickup and the rotor points?