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same no spark prob 98 gtx lmd

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wetbike

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ok so I have the fuse blowing in between the solenoid and the MPEM. sometimes the 15 amp in the mpem blows some times the in line fuse blows. my problem is the fuse blows immediately so I cant run it to check my volts to the battery. I put a 20amp fuses in to see if I could get it to run for even a few seconds but they just pop too. I have already changed the MPEM and I believe the rectifier located in it. any one know what to do in this case?
 
You need to list you seadoo model and year in your avatar. Like mine is. It makes it easier to help out in the future.
Check out the information on the charging circuit;

When the engine is running, set your voltmeter for 20 VDC and put the leads on the correct terminal posts. With the engine running, you should be reading anywhere from 14.5 to 14.8 VDC. (typically this test is done at 5,000 rpms) This tells you your charging circuit is good. If the voltage is higher, the regulator is bad. If you’re not showing a charge and you've replaced the rectifier, you may want to do a test on the Magneto/stator/charging coil. If you’re not a premium member and you don't have access to a manual, this test will be hard to do without it. There are 2 fuses that protect the charging system. Check the 15 amp fuse in the MPEM and the 15 amp fuse between the solenoid and the MPEM.

The magneto and stator create un-regulated AC current. The "rectifier" converts that AC to DC current and the regulator maintains the current between 14 to 14.5 volts DC for the engines operation and charging circuit.


I hope this helps.

Karl
 
But I can't start it because the fuse blows immediately. Thats where I'm stuck on this. If I can't start it I don't know how I am going to get a volt reading from the charging system. Any Ideas?
 
Exactly...if you read the post it states that it could be the regulator that is bad. The fuse blows as it is putting out too much voltage. I'll dig into the manual for more info for you.

Karl
 
o ok.. I see.. Possibly voltage regulator (bad) sending to many volts immediately blowing fuse. your the best Karl;)
 
In the manual, It states all the High Amperage/ Voltage components are located in the rear electrical box. The Regulator might be located in there, I don't see any specific test to check it. I'll keep looking.

Karl
 
In the GTX, with the 947 engine, the regulator and rectifier is integrated in the mpem...That narrows it down to the magneto being the problem. It puts out 5 amps...To check the stator (trigger coil) you need a 6 pin harness adapter to check it, or you could get your multi meter to the White wire and the Black/ Yellow wire from the stator, and check for resistance of 190-300 ohms.
That would tell you if it is bad or not.
 
Ok the wires that were coming out of the stator were 3 yellows 1 black/yellow and one yellow/white. I tested the black/yellow and the yellow/white. They tested at 247 ohms.
 
It should be at 190 to 300ohms so you're in range, that's good, that parts is ok. Let me dig for another test for you to do.

Karl
 
Check the starter solenoid first by jumping across the solenoid with a 14 guage insulated wire. If the starter is working than it isn't the solenoid or solenoid. If the solenoid sparks and not roll over the starter it could be the solenoid, which would pop the fuse also as it is a direct lead back from the battery...
Keep me posted.

Karl
 
I did that the other day and it seems to wheel the starter over but not as good as I would think it should.The battery is full charge. I used a jump lead but with the button that I bought for that. This is not my seadoo so I don't know how it started before but it doesn't sound like other seadoo's I have driven in the past.
 
does the ohms test from the startor cancel out metel shavings in the mag? Man I wish I knew more about these things lol
 
o I'm not saying that's what I have found, I have just heard of a few people with this model seadoo that found that and it cured the same problem I have. I just don't want to tare this all apart until I have diagnosed the problem. sorry if I am being a pain but I do really appreciate the help.
 
You could try testing the harness that runs from your stator to the mpem, Unplug it at the engine and at the mpem and see if you possibly have a short in the harness with an ohm meter
 
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