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No spark new stator

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seadoomeck

seadoomeck

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Hey guys I have a 1997 sea doo with a 787 2 stroke engine I had in issue with my old stator ND just installed the new one but I noticed the green stuff all over it. I know it should be on the windings but should it be on the end contacts all around the edges? I have zero spark now so I'm wondering if it's possible that it's not allowing for the pickup to receive the energy?
 
Usually when people replace the stator with used it means the stator, pickup and plug all as one assembly. Or did you replace just the stator only?

It's OK for the resin to be all over it. There are no contacts. It's all a touchless rotating magnetic feild.

Measure the resistance of the pickup coil.
Try cranking the engine and measure the battery voltage while cranking. Less than 11v means no fire.
 
Man if that's the issue which I have close to 9 I am going to be stoked I'll put it on a charger and we shall see thanks man

Mekanix said:
Usually when people replace the stator with used it means the stator, pickup and plug all as one assembly. Or did you replace just the stator only?

It's OK for the resin to be all over it. There are no contacts. It's all a touchless rotating magnetic feild.

Measure the resistance of the pickup coil.
Try cranking the engine and measure the battery voltage while cranking. Less than 11v means no fire.
Click to expand...
 
Also I just replaced the stator . Just put the old one back in so I can get back to original issue but for now I just have no spark. Had spark before I changed out stator but it could also be just the battery because I won't crank with plugs in and I only get 9v lol
 
Cdi is sensitive to voltage. Too low and it simply doesn't charge up enough.

Switching to a 97 mpem helps with this. I did with mine and now i can get fire down to 10v. But before that it was hit and miss if the battery got lower than optimal.

Get a good battery that has 310 cca.
YTX20HLBS is what i used.
 
I am 90 % sure that stator is in right and I didn't touch any wires besides the wires for the pickup and the stator. They are just color to color for the wiring I just pulled up a diagram . I'd besides the batterie why I have no spark . Because I had spark before I took this one out
 
When your cranking the engine over do you see the rpm change at all?
The tach gets the rpm signal from the mpem which gets it from the cdi and that comes from the pickup.

If the pickup is working and sending a signal back through to the cdi, we can look at other things.

Measure the resistance across the pickup coil.

You can also look at the two plugs. Maybe there is a break in one of the contacts or one of them is being pushed back.

Also keep in mind that spark jumps from one plug wire to the other and not to ground. It just uses the engine casing as a way to connect to eatchother. So put the plugs together and see if you get spark then.


To check the stator: measure resistance from each yellow wire to eatchother, You should get very low resistance. less than an ohm.
Also there should be no connection to ground from those three wires.

Is the ground wire still good from the connector to the casing behind the stator ?
 
OK so no change in Rpm. I also don't have a tac. So I can't see the real rpms I haven't measured on the pickup coil. But I will. Also like I said I did just change the stator and had spark before. As far as spark I used a multimeter and also a light that connects in between plug and plug wire.
I measured stator through to the rectifier just before it goes into it. So I know my pins are connected at the case and the stator checked at 1.2ish
 
I'm leaning towards something has been disturbed behind the casing then.

That coil is fired by pulsed a.c. from the cdi.
So its always got a ground but the power switches on and off to create the spark.


So check the ground for the casing and the pickup coil resistance and you can also check the AC voltage a cross the pickup coil while cranking.
 
Last edited by a moderator:
So with the ground to the case. If that ground is interested hooked up the motor wouldn't turn over at all because it's the brains ground right?
 
261.jpg
 
Nope that's normal.

There is a small microchip under that black spot. its just a piece of poting over the chip. They all look like that.

Even if you had no stator or regulator/rectifier the machine would still run and give spark with a good battery.

Since you only opened the casing and disturbed the stator/ground/ pickup coil/ Wire harness there isn't much else.

Check the resistance of the pickup coil and then check the resistance at the CDI for those wires.


Black yellow and yellow white at the engine plug should give you between 190 and 300 ohms.
Then test from the Ground plate / yellow white wires at the mpem with the engine plug reconnected.

That way we will know if the signal is making it all the way back to the mpem.

If your not getting an increase in rpm on the gauge your not getting a signal that the engine is turning.
 
Last edited by a moderator:
Mekanix said:
Nope that's normal.

There is a small microchip under that black spot. its just a piece of poting over the chip. They all look like that.

Even if you had no stator or regulator/rectifier the machine would still run and give spark with a good battery.

Since you only opened the casing and disturbed the stator/ground/ pickup coil/ Wire harness there isn't much else.

Check the resistance of the pickup coil and then check the resistance at the CDI for those wires.


Black yellow and yellow white at the engine plug should give you between 190 and 300 ohms.
Then test from the Ground plate / yellow white wires at the mpem with the engine plug reconnected.

That way we will know if the signal is making it all the way back to the mpem.

If your not getting an increase in rpm on the gauge your not getting a signal that the engine is turning.
Click to expand...
Also do I test while cranking ?
 
For resistance just unplug the connector at the engine and check across the wires going to the pickup without cranking the engine. You should get between 190 and 300 ohms. If you get more than that or nothing at all, that would point to the pickup being bad or the wires at the plug being bad.
 
OK new information I didn't even think about it but I have no beep beep when I put the key on. Also one of my wires on regulator rectifier that was supposed to say nothing had a reading ...
 
Rectifier wouldn't cause anything like this. In fact you don't even need in connected at all to troubleshoot the spark issue.

That will only affect when its running. So for now you can ignore the stator and regulator.

As for why your not getting beeps, The beepers do die over time. sometimes you might hear a little click. If it still turns over when you hit the start/stop button you can ignore the beeper not working.


What did you get for resistance across the pickup coil ?
 
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