2000 Sea-Doo GTX jet ski problems - PWC Forum: The best hang-out for Personal WaterCraft enthusiasts
 
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post #1 of 9 (permalink) Old 05-15-2017, 05:09 PM Thread Starter
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2000 Sea-Doo GTX jet ski problems

Hey I am new to this forum, so sorry if I do not do something right.

Okay hear is the story, I bought a 2000 Sea-Doo GTX off a friend and everything seemed fine. Took it for a test ride and used a full tank, everything seemed fine so I bought it off of him. After about about 2 weeks of buying the jet ski on my third time out i was riding it. like all other times it started up and it went and got up to speed no problem. Has a little less then 160 hours so its really not been used that much. But i was riding it and i took a sharp turn and it randomly cut off. All power to the front dash and went dead. Got a towed back into the docks and hooked it up to the trailer and took it home to try to find out what was wrong with it, but with it being late October of 2016, i gave up and left it to sit in my garage till next season.

So fast forward to the beginning of May 2017, i took the jet ski into a shop and had them see what they could do. They found out the battery was not secure and with all the bumps of the water a wire got pinched and fried, they replaced the fired wire and put in a new fuse. it and it seemed like the ski would work like normal, but thats not the case. I took it out that day and it starts fine and idles with no problem, I start to give it some gas and it wanted to go but seemed like it was loosing alot of power. Ive seen the rpm on the dash go up to 6000+ but it wouldnt go past 3000. I hardly get any power, it just rides through the water. I emptied that gas tank and added new gas and new spark plugs today but i came out with same results (about 3500 rpm max). Im at a lost of words and I dont know what to do next.
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post #2 of 9 (permalink) Old 05-15-2017, 05:16 PM Thread Starter
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Here is my thinking to what could be the problem, they replaced a wired and fuse, maybe they used a different gauge wire and its not getting enough power, or could it possibly be there be another wire thats still fried only giving me half the power? \

Im new to these water machines and really would like to learn but im just not sure on this one. IF you have any questions regarding the jet ski in order to help me find out i will try to get back with you as soon as possible.

Thanks, Shane.
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post #3 of 9 (permalink) Old 05-16-2017, 06:04 AM
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Is it carburated or fuel injected ? If it is carbed, probably just needs to be rebuilt and cleaned. Need to make sure you document exactly how many turns from lightly seated the mixture screws are before removing them. Might use a paint pen and make a mark where they are now and seated location for ref.
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post #4 of 9 (permalink) Old 05-16-2017, 03:26 PM Thread Starter
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it is carburated

while looking around i found out that the throttle cable fell off the holder and was very loose. We reattached the cable to the bracket and it started working someone normally.

When i go about half throttle it goes to about 4500 rpms and it gets up on top of the water, but if i give it more gas it jumps really high rpms, like almost 7000. then falls back down to 4500 and just keeps pulsing. it jumps up and down at full throttle, what would be the cause of that?
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post #5 of 9 (permalink) Old 05-16-2017, 06:13 PM
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Make sure the cable is adjusted right. Cold, the throttle blade should be just open to the vertical postion.
The surging is a lean condition. I would point to fuel pump or regulator diapham.
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post #6 of 9 (permalink) Old 05-16-2017, 08:19 PM Thread Starter
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In order to get to a position where i can see the positive of the cable i have have to take off the exhaust manifold. Is there anything i should consider when taking it off? I will look into the fuel pump once the cable is ruled out.
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post #7 of 9 (permalink) Old 05-17-2017, 05:46 AM
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Easier way to check. Pull the throttle then reach down with the other hand and see how much more the arm will move. It should have very little left to move, if any at all, and still have a little slack in the cable when you let off the throttle.
Cable will not cause a lean condition.
Another question. When it revs to 7k, does it feel like the impeller is slipping, or does the ski jump each time the engine surges ?
If it's been a while, the carbs really should be rebuilt. They can get all sorts of junk in them just sitting, even for a short time, and cause all sorts of problems, also check and make sure the carb mounting bolts are tight. If not, pull the carbs and make sure the are still gaskets there.
Good thing is, it's a 951 reed valve engine. Very good setup. While your in there, look and make sure all the oil injection lines are still soft, flexible, and secure. if not, now is the time to replace them.
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post #8 of 9 (permalink) Old 05-18-2017, 08:30 PM Thread Starter
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When it revs to 7k, the ski does jump each time the engine surges, its scared me at first, like a horse bucking.
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post #9 of 9 (permalink) Old 05-19-2017, 05:26 AM
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OK. It's most likely fuel oriented. Get a couple of carb kits (about 35.00 ea.), and rebuild the carbs. Don't use the new float springs in the kit. The old ones are fine, and document how many turns from seat each mixture screw is for each carb.
Your also going to need gaskets for any exhaust components you take out of the way.

Last edited by rodsatheart; 05-19-2017 at 05:28 AM.
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