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  1. Replies
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    Yes, it very well could be the coils, coil wires,...

    Yes, it very well could be the coils, coil wires, or igniter. I figured the rectifier check was free and easy to check and rule out. Let us know what you find.
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    A bad rectifier/regulator can actually can cause...

    A bad rectifier/regulator can actually can cause the engine to malfunction. It turns AC into DC and if its bad, it can cause unstable voltage. On Sea Doo's, for diagnostic purposes, you can...
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    Another idea might be to test the charging coil...

    Another idea might be to test the charging coil and rectifier/regulator. Others have reported strange symptoms due to faulty rectifiers, even with fully charged batteries.
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    Does changing the plugs temporarily fix it? There...

    Does changing the plugs temporarily fix it? There was a time when my ultra was doing something similar, so I would bring extra plugs to change out on the water. When a plug starts to foul, it can do...
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    The cheap knock-off stuff is definitely garbage....

    The cheap knock-off stuff is definitely garbage. I tried some blue no-name "fuel line" from ebay on a vent line on my sea doo. It was marketed as motorcycle/ATV/UTV/snowmobile/quad BLUE fuel line. It...
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    http://greenhulk.net/forums/attachment.php?attachm...

    http://greenhulk.net/forums/attachment.php?attachmentid=478225&stc=1
    I put this brand of polyurethane on my ultra 150 about 8 years ago. Its still holding up very well. Superthane Ether 1/8 ID 1/4...
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    Cool, I'm glad you got it fixed and didn't have...

    Cool, I'm glad you got it fixed and didn't have to go farther than the pump.
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    You would have to take the driveshaft out to spin...

    You would have to take the driveshaft out to spin the bearing in the holder by hand to see if it's smooth. You could possibly inspect the rubber of the holder for cracks without removing anything...
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    Might want to check engine alignment, engine...

    Might want to check engine alignment, engine mounts, driveshaft holder alignment, and driveshaft holder bearing too. Maybe one of those is putting extra stress on your pump bearings.
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    On the bright side, it looks like you got to it...

    On the bright side, it looks like you got to it before the crankcase got ruined. What's the gray stuff near the rear balancer chamber? Is that water and oil mixed?
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    Yeah, maybe they lost the oil when they pulled...

    Yeah, maybe they lost the oil when they pulled the starter. Are there traces of oil in the hull? Even though, I think more than one paper towel's worth should have remained in that front chamber...
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    Low oil could definitely be a problem. How much...

    Low oil could definitely be a problem. How much came out when you took off the front cover?
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    So, the balancer gear bearings are bad? And the...

    So, the balancer gear bearings are bad? And the starter clutch as well? Was the oil level in the front balancer chamber OK when you disassembled it?
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    Yes, there is a check valve in the case behind...

    Yes, there is a check valve in the case behind the flywheel.
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    Definitately don't start it again until you...

    Definitately don't start it again until you figure out the noise. If its an internal engine part, you may still be able to rebuild it. If you start it and something lets go, it can ruin the...
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    It looks like fuel sprays out to me. I paused the...

    It looks like fuel sprays out to me. I paused the video and advanced it frame by frame. At 4 seconds, it looks like fuel is spraying when the throttle valve opens. I thought it could be the...
  17. I don't know the answer, but I have an idea....

    I don't know the answer, but I have an idea. Suppose you sealed it with fuel resistant gasket maker like threebond 1184 and let it cure. You could then pressure check the nipple while holding your...
  18. Is that what the piston looked like the last time...

    Is that what the piston looked like the last time it burned up when you had stock heads?
  19. https://youtu.be/2DksaGcadsY ...

    https://youtu.be/2DksaGcadsY

    https://youtu.be/9Gb9hvIqocA

    So, the throttle shafts and choke shafts definitely leak on these carbs. I don't know what the acceptable loss is though. On this...
  20. Sure, I would look at them for you. Or, I could...

    Sure, I would look at them for you. Or, I could walk you through a few steps where you could do it at home.
  21. I was thinking about the carbs, and you really...

    I was thinking about the carbs, and you really don't have to separate them to test them. I would make sure the passages are all clear, check the diaphragm and vacuum slide, and then do a pressure...
  22. You can make a plate from wood or pcv and put a...

    You can make a plate from wood or pcv and put a rubber sheet between it and the carb base. Do the same for the top of the carb. Maybe a rubber pipe cap and clamp would fit the top. Drill a hole in...
  23. Maybe the throttle shaft on that third carb is...

    Maybe the throttle shaft on that third carb is leaking air. You might try doing a smoke test on it. Or you could fabricate plates, pressurize a little bit, and do a soapy water test?

    Maybe measure...
  24. If you tilted the jet ski down on the left side...

    If you tilted the jet ski down on the left side and put it in the nose down position, maybe you could rule out or confirm the starter as the source of the leak before actually replacing the O-rings?
  25. I had an oil pump sitting here so I put on the...

    I had an oil pump sitting here so I put on the calipers to measure. Steve is exactly right on the measurement.

    I think I used a 1/16 x 3/4 and it worked, but now that we know its available from...
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