96 XP has bad miss when accelerating

[Richieskis]

Hello everyone and thanks for reading my post and your help in advance, ok my 96 XP 800 has a new problem that has stumped me, ok, it is now acting like it has a bad miss, as you try to accelerate, motor seems to be cutting in and out. Ok, history, it has about 10 hours on a new top end, compression is 150 psi, and was running great until the last trip out, when it was put in the water with the plug not in, by the time it was noticed about 10 to 15 min, the water was up about ¼ of the bottom of the motor, the rear back electrical box had about an 1” of water in it, got all the water out asap, dried out everything but now it has the bad miss as you try to accelerate, spark plugs have been replaced sense water in haul, compression re-checked still at 150 psi, last summer fuel lines replaced and fuel selector clean. carburetor cleaned, rave valves cleaned and re-sized for new top end, Help, I am thinking something that got wet and damaged but not sure, your help ? please give me inpu

 

[LouDoo]

Check the voltage regulator/rectifier. It's in the front E-Box, for testing disconnect the red wire and see if the problem clears up, if it does replace the rectifier. The battery will not charge with the red wire disconnected.

Lou

 

[Richieskis]

Thanks Lou, I will give it a try this morning, regulator / rectifier is the one with 3 yellow and one red wire, right, and you can just pull the red wire connector apart, about how long do you think it will run with out charging battery at least 5 min ? it takes about 5 min to get out to fast water to test.

Rich

 

[Richieskis]

Lou, you are the Man, that was it, now I just need to order a new one, Lou thanks, with all the help you give, on this forum.

Rich

 

[LouDoo]

You're welcome, here's where I got mine.

http://www.regulatorrectifier.com/catalog/Sea-Doo-256

Lou

 

[Richieskis]

Help still needed, Lou or anyone, I put in the new Retifier, and problem is still there, I pulled the new retifier's red wire motor run great, went and picked up a used Retifier from a local seadoo repair shop, he said it should be good, does the same thing, when hooked up motor has bad miss, then pulled the red wire runs great, what next, the seadoo guy gave me a MPEM out of a 96 GTX /GSX, I dont think it will work for the XP, and He did not give me a dess key, help where should I look next.
Rich

 

[nevitt4]

sounds like he gave u a bad rectifier or a bad wire

 

[nevitt4]

if im reading right u have tried two rectifiers

 

[Matt Braley]

Yep, bad used part. They must be cutting those 96 rectifiers of by satellite. Lou is right to look there first cause I've personally seen it three times this year.

 

[LouDoo]

Since you've replaced the rectifier with a new one, and also tried another used one, I'm thinking that you might have a bad stator. I'm gonna have an expert look at this thread and see what he says.

Lou

 

[Richieskis]

if im reading right u have tried two rectifiers

Yes reading it right, I got a new one from Jet Ski Plus, they were only $39.00 and free shipping, and

 

[Richieskis]

if im reading right u have tried two rectifiers

Yes, I have tried two, one new from a place on line called Jet ski Pluss, they were 39.00 and free shipping, where regulator rectifier was 49.00 plus shipping, so after putting the new one from Jet Ski Plus in motor has bad miss still, pull red wire and motor runs great, so now, I think could have have gotten bad one from Jet Ski Plus, maybe so I go to local shop, he has one on shelf, says it should be good, but it is used, but what the hell, dont have anything to lose, ski not running, and I can not order one from Regulator rectifier right now, so the used one from the shop does same thing, but it could be bad, he did give me MPEM, mod for 96 GSX GTX 800, but not the dess so I dont think I could even test that, I just want to make sure it has to be the rectifier before I order one more....

 

[Richieskis]

Since you've replaced the rectifier with a new one, and also tried another used one, I'm thinking that you might have a bad stator. I'm gonna have an expert look at this thread and see what he says.

Lou

The guy at the shop said that, might be bad stator, I just wanted to make sure of if there was a test before I headed down that trail, 3 rectifiers and all do the same thing and one should be new, I would even try one more being a easy install, compaired to stator.

Lou your help is great. thank you.

Rich

 

[Dr Honda]

This one is tough. I have a hard time believing that 3 rectifiers were bad.... but a properly functioning rectifier would isolate the stator.

But, with that said... pull the yellow wires, and check them for a short, or ground.

 

[Richieskis]

This one is tough. I have a hard time believing that 3 rectifiers were bad.... but a properly functioning rectifier would isolate the stator.

But, with that said... pull the yellow wires, and check them for a short, or ground.

Thanks for the help Doc Honda, yea, that always seems to be the story on this XP a tough one, so do I check all three yellow wires to ground, and then what should the reading be between each of the three yellow wires, as for the check to ground, would be the wire to case of the rectifier ? Right
Rich

 

[Richieskis]

ok, did a test of the two rectifiers I have out of the box, all wires to ground, 3 yellow and one red, all show good, open, no shorts, yellow to yellow test all show good, open, no shorts, now red to yellow with female connector "shorted to each other" other yellows to red, open, no shorts. both rectifiers. are they good or are both bad ? one is the orignal, and one is the new one from Jet Ski plus.
Rich

 

[Richieskis]

Ok, everyone, Dr Honda or Lou, looks like all three have the same readings, for gounds or shorts, too me, not sure but looks like it could be a Stator ? If it is does the motor have to come out to change it ? if motor does not needed to come out about how hard to change, and you you get one from regulator rectifier ?

Thanks for your input and help
Rich

 

[seadoodoopartsofcf]

Have you tried to trim 1/4 inch off the spark plug wires? It seems like everyone has jumped onto the charging system being an issue...have you used a volt meter to check output???? Correct me if I'm wrong but throwing parts at it won't fix the issue until you verify what system you are having problems with.

 

[Richieskis]

It runs great with the rectifier out of the system, and with the rectifier out the stator is also, I have not check the voltage output, but that will be the next thing. I dont think it is the spark plug wires as that would casue it to be bad with our with out the rectifier I would think but I will check that two.

Rich

 

[LouDoo]

Rich,

It wouldn't hurt to trim back the spark plug wires, I agree it probably won't fix your problem, but what the hell, it's free.

Lou

 

[Richieskis]

so I just cut the wire tie and pull the boot and cut and strip and reconnect and reput the boot on ?

Rich

 

[seadoodoopartsofcf]

Yep...that's it. Give that a shot but most likely you will have the same issue. I read threw the thread and did not see where the ski ran better with the rectifier disconnected until you replied. Does the battery go dead at all? 787's take a good bit of juice to start.

 

[Richieskis]

The battery did not go dead, but I just put the XP in the water and I am in fast water less then 100 feet with the rectifier connnected it just sputters and misses, I go back to shore and disconnect the red wire on the rectifier and run it out to fast water and full power, no problem, runs great, but only run it for 2 min at most, but with the rectifier reconnected, it is a mess right away, you can even tell it is going to be a problem in the slow water.
Rich

 

[seadoodoopartsofcf]

You say it runs good for 2 min. What does it do after the 2 min? Run bad or shut off?

 

[roy4481]

i had the same issue after replacing my rectifier. I had to re adjust the carbs to stock adjustments to clear it up. I dont know how or why but it worked.