1995 Seadoo XP Runs great out of water, bogs in water

[bwhite]

I have a 1995 Seadoo XP with which I rebuilt the carbs and replaced all the lines about two years back. It runs great with high revs out of water, but when I put it in water it will run fine for maybe 30 seconds then slowly surge power randomly for about 15 seconds and just bog if you give over 1/4 throttle afterwards.

I have adjusted the Low speed and High Speed screws to factory settings. Then adjusted the High Speed because it was doing this by a 1/4 turn out. Same thing. I then moved to 3/4 turn out.. No change.

It doesn't bog or anything out of water. Usually fires right up, regardless.. Smokes at idle, not so bad at high rev out of water. Might I also add the tachometer and center gauge (oil, fuel, battery and temp) are not functioning. I read up elsewhere a shorted ground wire to the tach could possible limit the engine or something like that? Seems odd that this would be the case, but how could I test this/should I?

Bad VReg/Rectifier? It doesn't rev weird or anything.. very responsive out of water. Any help is appreciated.

 

[racerxxx]

Welcome to the forum. Have you done a compression test on the engine? After you rebuilt the carbs had you ridden the ski? Assuming you did for the last 2 years with no problems. The high side should be 0 turns out. To see if the rectifier is shot you can open the front gray E-box find the regulator (3 yellow wires and 1 red) and disconnect the red wire. Tape over the red plugs to be extra careful. Test it in the water. Remember, you are now not charging the battery, but if the ski runs normal you know the problem. You can also check the voltage as it's running on the battery. If it's over 15VDC it's shot, if it sits at the same voltage while you rev the engine to about 5K PRM it's probably bad as well. If the rectifier goes back it can cause the ski to run bad.

 

[bwhite]

I will test the voltage on the battery at high RPMs (I don't have a working, tach so I will have to guess using my other by ear). Seems like I tested it the other day and all seemed well. I'll update on that tomorrow.

Also, to clarify I rebuilt the carbs 2 years back, but I have not gotten it to run correctly since. It had set for a few years without use, easily beforehand.

 

[racerxxx]

Ok, so then you might be going back into those carbs.

 

[racerxxx]

Just remember, your idle out of water is about 3K rpm. You're not revving much higher, so don't paste the lever to the grips, LOL.

 

[Coastiejoe]

DC Voltage at the battery does not mean the regulator is good. When they start to failure they can produce small A/C voltage and it screws with the ski. So even it'll it does test good, unplug it and do a test ride to see if the problem goes away.


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[AdamXP800]

I did not think the 95's had the regulator issues like the 787's



96 XP800!
Keep the 2 strokes alive!

 

[racerxxx]

I did not think the 95's had the regulator issues like the 787's



96 XP800!
Keep the 2 strokes alive!

Probably not, but cheap and easy to investigate.

 

[TurnerBFC]

I am having the exact same symptoms on my 96 XP, I ordered an OEM rectifier on Monday for $130, it is supposed to be in today. I will install it tonight and take it to the lake.

I will let you guys know on my post and this post whether or not a new rectifier fixed it. I also did a complete fuel system overhaul (fuel lines, carbs, etc).

 

[bwhite]

Just tested the voltage at around 5k RPMs and it never got above 14.1V. Seems as though it may be working as expected, then?

I will let you guys know on my post and this post whether or not a new rectifier fixed it. I also did a complete fuel system overhaul (fuel lines, carbs, etc).

I'm curious to see if the rectifier resolves your issue. Next things to look at?

 

[TurnerBFC]

Just tested the voltage at around 5k RPMs and it never got above 14.1V. Seems as though it may be working as expected, then?



I'm curious to see if the rectifier resolves your issue. Next things to look at?

Odd... take a look at this post, http://www.seadooforum.com/showthre...gs-down-and-won-t-go-fast&highlight=rectifier , could be related. Not sure but worth a look for sure.

My ski was reading above 16 volts at idle (~3000 rpm) so the guys on the forum say it is most likely the rectifier. Still waiting on the word whether or not it has arrived.

 

[bwhite]

Just read every post in that discussion.. Oddly it's similar issues, but my voltage was showing fine. However, I did test it first with my multimeter on the engine (vibrating) and it jumped above 16V a couple times. I then moved the multimeter to the foot pads and it stayed around 14V.

Could that be a rectifier on its way out and if so, does anyone know where I could get a replacement rectifier for the '95 Seadoo XP 717/720?

 

[TurnerBFC]

Just read every post in that discussion.. Oddly it's similar issues, but my voltage was showing fine. However, I did test it first with my multimeter on the engine (vibrating) and it jumped above 16V a couple times. I then moved the multimeter to the foot pads and it stayed around 14V.

Could that be a rectifier on its way out and if so, does anyone know where I could get a replacement rectifier for the '95 Seadoo XP 717/720?

GO OEM!!! Do not buy aftermarket when it comes to electrical on these things. I just paid $130 CAD for mine

 

[Prime Target]

Do a compression check. My brother had similar issues on his 96 XP. Strong on the trailer, no power under load. He had 200+ hrs on it, tested the compression and it was low. He did a top end rebuild last year and now it's a scalded ape.

 

[bwhite]

Looking through tons of info for OEM, who was the original manufacturer of the 95 XP OEM Rectifier? Is SBT all aftermarket? I found this for around $50: http://www.shopsbt.com/sea-1995-xp/sea-doo-regulator-rectifier-gti-gts-gtx-278000123.html

 

[AdamXP800]

Aftermarket poo
Contact [MENTION=41828]Minnetonka4me[/MENTION] he will sell you a quality used oem one



96 XP800!
Keep the 2 strokes alive!

 

[bwhite]

I'll get in touch and test it out unplugged in a couple weeks.. (going out of town and won't be near water with them until then)
[MENTION=76203]TurnerBFC[/MENTION] any luck with your ski?

Do a compression check. My brother had similar issues on his 96 XP. Strong on the trailer, no power under load. He had 200+ hrs on it, tested the compression and it was low. He did a top end rebuild last year and now it's a scalded ape.

Yeah, I thought about that, a friend of mine has a gauge and will try that when I take it out soon as well. But, if it was compression it shouldn't randomly get up to speed for short bursts after running it at idle for awhile, right?

 

[TurnerBFC]

I'll get in touch and test it out unplugged in a couple weeks.. (going out of town and won't be near water with them until then)
[MENTION=76203]TurnerBFC[/MENTION] any luck with your ski?



Yeah, I thought about that, a friend of mine has a gauge and will try that when I take it out soon as well. But, if it was compression it shouldn't randomly get up to speed for short bursts after running it at idle for awhile, right?

Hey man, Yes! Had it out tonight. Runs perfect now. All I did was adjust the HS screw for my pipe, replace fuel selector, and swapped rectifier.

Keep us posted!

 

[bwhite]

Aftermarket poo
Contact [MENTION=41828]Minnetonka4me[/MENTION] he will sell you a quality used oem one

I've sent a PM, but it doesn't show in the Sent Messages, is this just how the PM system works on the forums?

 

[ocod]

I've sent a PM, but it doesn't show in the Sent Messages, is this just how the PM system works on the forums?

He'll get a mention message and should post soon [MENTION=41828]Minnetonka4me[/MENTION].

 

[bwhite]

I just realized, I also haven't replaced the stock fuel lines *facepalm*... Do I need to remove many parts to gain access to all of the connectors? Also what lines (and length) would you recommend as well as clamps? Any particular tools I need other than a very basic toolset w/ some needlenose? Is there a thread with detailed guide, possibly w/ pictures, for my model?

 

[racerxxx]

Local autoparts store. Get a 20 or 25' roll of 1/4" black fuel line and hit Home Depot for 3 bags (10 each) of full stainless hose clamps. Both should set you back $50 total or close to it. You still better pull the carbs and clean them internally. If you have green ectoplasm on the nipples you can almost bet the inside is gonna have junk in the little filters.

 

[Minnetonka4me]

I replied to your pm...

 

[bwhite]

Can an admin please explain why I can't see any sent/received PM's at all?

 

[racerxxx]

You have to set up if you want a copy of your sent pm's I think. On the left side of the screen click messages, they should show up. This is assuming your on a pc and not tapatalk on your phone or device

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