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  1. Re: Aftermarket MPEMs and Ignition Components 1996-1997 787s

    At least with the rectifier/regulator, I can't figure out why they designed it to be "dual half-wave" design instead of a true 3 phase design used in nearly every automobile since the mid 1960's. A...
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    Re: 98 sea doo gtx/ltd

    Sounds like something might be wrong with the RAVE valves actuation circuit. Broken solenoid or malfunctioning check valve in-line from the crankcase pressure hose.
  3. Re: WTB or put together Bill O's GSXL Prok & jet kit

    You are lucky I had this readily available. I thought I had misplaced it when I started looking through my SeaDoo stuff the other day.

    R.I.P. Bill

    I just found out that he had passed in 2019. ...
  4. Re: WTB or put together Bill O's GSXL Prok & jet kit

    567915
  5. Re: 1998 GTX LTD Extremely Hard To Start Cold But Super Easy To Start When Warm

    Btw, instead of me explaining, just YouTube a tutorial on how to measure resistance.

    In order to measure each spark plug cap, clip the zip-tie, and UNSCREW it from the wire. You insert test...
  6. Re: 1998 GTX LTD Extremely Hard To Start Cold But Super Easy To Start When Warm

    Unless you know for a fact that the gas left over was Ethanol free, there is a definite possibility of the loss of octane points by just sitting for 6 months which could definitely affect starting. ...
  7. Re: 1998 GTX LTD Extremely Hard To Start Cold But Super Easy To Start When Warm

    Those plugs look super wet. Just throwing this out there: where did you get your last tank of fuel from? Is there a possibility that you have some water collected at the bottom of the tank?
    ...
  8. Re: 1998 GTX LTD Extremely Hard To Start Cold But Super Easy To Start When Warm

    How many hours on the ski / engine? Has the engine been rebuilt? Do you know the condition of the reeds?

    Have you tried opening the gas cap, as an experiment, while you try to crank it? I am...
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    Re: 1996 xp shut off completely

    If you need to check the lanyard magnet, use a small steel bolt or screw and see if you can hold it with the key magnet.

    As for the the whether or not the chip inside the key is bad, you need to...
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    Re: 1996 xp shut off completely

    Here are the bare minimum requirements:

    Charged battery. Clean and tight small grounding wire to rear electrical box connector. Good clean ground cable connection to engine starter ear. Good...
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    898

    Re: 1996 xp shut off completely

    Any signs of life? Do the gauges turn on for 33 seconds by pushing the Start button once with the key off?

    Sent from my SM-N975U using Tapatalk
  12. Re: Thrust Bearing Orientation Redesigned 293350019

    The side does not matter on that bearing. Concentricity does. Do not try to install the impeller without making sure the bearing is held captive by the machining step on the impeller shaft.

    Sent...
  13. Re: 97 GSX Assistance. Idles Great! Backfire Under Throttle

    Compression is definitely a concern, the closer the better. It's possible that the rotary gear could be starting to shear, no way of knowing until the carbs are pulled and you can see how much free...
  14. Re: Fuel baffle plastic welding, is this good (pics)?

    As many before you have done... repair looks good.

    http://www.pwctoday.com/showthread.php?t=373576&highlight=fuel+sender
    http://greenhulk.net/forums/showthread.php?t=26012...
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    Re: 97 spx electrical issue

    What happens when you swap this battery into your XP and XP battery into the SPX?

    Sent from my SM-N975U using Tapatalk
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    Re: 97 spx electrical issue

    How old is the battery? What brand or type of battery? What's the charging voltage after the engine is running? If the battery is good and is at 12V but then it drops to 6V, I'd be interested to...
  17. Re: 787 Resto Concerns upon disassembly (pictures) need HELP!!

    Oh doesn't the counterbalance have oil ?

    Yes it does but that's an EXTERNAL chip. That groove is only for the internal snap ring that is installed to retain the aluminum cap with o-ring. Check...
  18. Re: 787 Resto Concerns upon disassembly (pictures) need HELP!!

    No big deal on the cases. File or grind with a Dremel. If you bought cases off Ebay, what do the old ones look like? Did the old motor grenade itself?

    Btw, if you're going to weld the head,...
  19. Re: 787 Resto Concerns upon disassembly (pictures) need HELP!!

    First, welcome to the club. Second, please upload your pictures to the site as an attachment as it just makes things easier.

    Now to answer your questions:

    PTO marks are nothing more than...
  20. Re: OEM Settings To Go Back To Stock Carb Rebuild 1996 787

    Your welcome. :smile:


    http://www.mikunipower.com/RebuildKits.htm

    http://www.mikunipower.com/Manuals/SBN_Manual.pdf

    http://www.mikunipower.com/Catalog/MikuniCatalog36-01.htm
    ...
  21. Re: Trickle Charging 98 GSXL with Battery Connected?

    Don't disconnect the battery, just disconnect the 6 pin connector from the rear black electrical box when you do. By disconnecting this plug you are removing power from the MPEM. I charge my...
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    Re: Ski doo CDI in 1989 Seadoo?

    Without directly contacting the manufacturer, there's no real way of knowing if all of them have the same timing curve. However, it would make sense to have interchangeable parts if the...
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    Re: info gauge troubleshooting

    https://www.ebay.com/itm/SeaDoo-GTI-GTX-LRV-LTD-LE-RFI-DI-LCD-Info-Gauge-Center-Display-Repair-Kit-/251763863241?_trksid=p2349624.m46890.l49286

    I did the same thing to a friend's gauge. You have...
  24. Re: 1996 GTX's haven't run since 2011 - time to ge them running again

    I use Gates Barricade fuel line on all my skis. I wouldn't chance anything: pull all carbs and clean them. Just my $.02, but after sitting that long, it's worth it just for the peace of mind.
    ...
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    Re: Impeller frozen to impeller shaft

    WTF? That IS seized. Did the offenders come from saltwater skis?

    Sent from my SM-N975U using Tapatalk
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    Re: Impeller frozen to impeller shaft

    I have found on occasion that using an impact does not help. I'd suggest finding the strongest vice you can to hold the impeller shaft and using a 1/2" breaker bar with extensions if needed to break...
  27. Re: XP 717 crankshaft bearing pin question

    Option A: Find a roll-pin at a hardware store with the closest size in diameter and cut it to length.

    Option B: Replace the single bearing with a WSM or stock bearing. The WSM version can be...
  28. Re: Cleaning sea doo crank cases with rotary bearing

    As long as you aren't spinning the bearing using compressed air(freewheeling), you are fine using a blow gun. Just make sure to get a several drops of two-stroke oil in there afterwards so rust...
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    Re: Wiseco piston cylinder clearance

    I dealt with this exact problem when I first started rebuilding my first SD 787 years ago. The reason that Wiseco recommends .005" of clearance is due the piston's metal composition (forged) and...
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    Re: 97 xp breather pipes

    I just checked my 99 this evening. My pipes go straight down and zip tie to the plastic shield which covers the drive coupling.

    565402

    565403
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    Re: 97 xp breather pipes

    I would have uploaded a picture if I were near my skis, my apologies if my initial response came across as condescending.

    If memory serves me correctly, the two rear vent tubes drop down from the...
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    Re: 97 xp breather pipes

    Google search images for "97 seadoo xp engine compartment".

    Sent from my SM-N975U using Tapatalk
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    Re: 787 trigger coil question

    Can I ask how are you testing for spark, aside from trying to get the engine to start? What is your ignition coil resistance? Have you unscrewed your spark plug caps from the ignition coil wires...
  34. Re: Seadoo 1998 SPX 787 Project Troubleshooting *HELP*

    Quick test: Battery connected, no key on the DESS post, take a magnet and hold it over the DESS post. If the gauges don't come on, the magnetic reed switch(inside the DESS post) has failed or...
  35. Re: Dreaded Cavitation issues 96 Speedster twin 717's

    While they're out, have you checked your drive shafts to see if either might be bent?

    Sent from my SM-N975U using Tapatalk
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    Re: New SPX owner

    Minus 1 you say? I wouldn't even bother turning it over by hand or starter until the engine is at least room temperature. Small amounts of rust on the cylinder walls in addition to any frozen...
  37. Re: Dreaded Cavitation issues 96 Speedster twin 717's

    What are the blue and white pieces that are around the driveshafts that are sticking out the through hull fitting? You can see them clearly looking up through the intake grates. That doesn't look...
  38. Re: Dreaded Cavitation issues 96 Speedster twin 717's

    Yes, I would imagine it could since the steel washer would be wobbling. But both engines? How badly beat up was this boat?

    Everything else being equal how is the bottom surface of the boat? Are...
  39. Re: Dreaded Cavitation issues 96 Speedster twin 717's

    Pictures of your fittings?

    Some owners on here have complained that they never have had good luck with the carbon rings.

    The rubber bellows should definitely exert some pressure against the...
  40. Re: Dreaded Cavitation issues 96 Speedster twin 717's

    Which style of through-hull drive shaft seal are you using?

    Carbon ring or Grease-able aluminum block with shaft seals?

    Sent from my SM-N975U using Tapatalk
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    Re: New SPX owner

    I can tell you a way, but you may have a hard time finding it/them. On the engines I have rebuilt, I have found multiple casting marks on each piece of the engine. Normally, it looks like a small...
  42. Re: Where to get 951 cylinder and crank or motor?

    Just my $.02 but I wouldn't waste the money to get more power. Ride it for another 50 hrs and then rebuild it, or buy a reman engine. The 951 is a powerhouse already and IMHO, you will be...
  43. Re: Where to get 951 cylinder and crank or motor?

    +1 It would help to know where you are starting from and what you are wanting to accomplish.

    Sent from my SM-N975U using Tapatalk
  44. Re: Where to get 951 cylinder and crank or motor?

    Do you have a good rebuildable core, or did your existing motor explode beyond repair?

    Sent from my SM-N975U using Tapatalk
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    Re: 1994 Seadoo SPI starter running

    First place I would look would be a faulty starter solenoid. The ski is 26 years old and its possible that the starter solenoid contacts are worn out.

    However, what would happen if you unplugged...
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