2002 Seadoo GTX Di Wont Start - PWC Forum: The best hang-out for Personal WaterCraft enthusiasts
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post #1 of 14 (permalink) Old 07-02-2019, 07:12 PM Thread Starter
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2002 Seadoo GTX Di Wont Start

Good Afternoon,
Let me start by saying that I am self taught at working on this ski with all of your guy's help over the last year and of course with youtube videos .

I bought a 2002 seadoo gtx DI after owning several 1997 seadoo gtx's. I rebuilt the top end (1 over, values shave down to the right size at the machine shop). It fired up on the hose, and alarm went off after several minutes then went away. I dropped it in the water and she ran great for 10 minutes then died and would not start back up. towed back in. Took her home, tested the rectifier and it was skyrocketing to 18 to 20 volts on idle. Changed the rectifier and ran it on the hose. 14.50 on idle 14.48 at 3000 rpm... Into the water she went.. ran for 10 minutes and she died. Towed back in. took her back home and tested the battery. Bad cell. Bought a new battery and tested it on the hose. 14.48 at idle, 14. 39 at 3000 rpm... back to the water. Ran it for 15 minutes just off the doc with wire clips to the battery and clipped to a volt meter.. put it in neutral and held it at 3500 rpm 14.39 at 3500 rpm 14.55 at idle... after 15 minutes, meter off and off I went. road for 10 minutes at 3500 to 5700 between here and there and then she shut down, those this time it was not an instant shut down like the first two time. It was as if she was running out of fuel. when I tried to restart it acted as if it had a weak battery and would not start. Towed in. When I got home the battery was at 12.55. I charge the battery and unlike before, not it will not start. It turns over and acts as if its not getting fuel or spark. One last note... each of the other time it stopped running, as soon as I got home and charged the battery she would start and run on the hose. This time she does not start. Just acts like she wants to but does not have fuel reaching her or no spark. I don't know what to test first in a logical order and I don't want to start taking parts off my other 2002 gtx di for testing at random. Would greatly appreciate some help.
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post #2 of 14 (permalink) Old 07-03-2019, 04:31 AM
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Pull a plug and check for spark. If spark, pull the flame arrestor and put some premix down the throttle body and see if it fires. If it does, then you have a fuel issue.
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post #3 of 14 (permalink) Old 07-03-2019, 09:34 AM Thread Starter
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Thank you Rodsatheart.. That's a great start. I'll do today... little after 1pm and I'll post result..
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post #4 of 14 (permalink) Old 07-03-2019, 06:31 PM Thread Starter
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Okay so so I replace the spark plugs for some new ones gapped correctly tested for spark and there was Spark. Drop some premix into the arrestor put the spark plug back in hit the button and though the battery seemed weak it fired up and stayed running. I shut her down and when I went to starter again she had a weak battery and would not start. I repeated the step putting a little fuel inside the arrestor started her up and even with the weak battery she started and continue to run . I turned her off and try to starter and again she's got too much of a weak battery I'm guessing to push fuel to get her started so I have my battery charger on the battery. so I won't be sure until the batteries fully ( put a voltmeter on the battery and it was at 12.45) if this again was a case of the jet ski running on battery power until it died. If so I'm back to square one which is I've changed the rectifier and this is a new battery that I purchased it's brand new never used and when I'm idling at 3500 RPM with a voltmeter on it it showing within the limits at 14.48 to 14.5 1... I have not kept the voltmeter on the battery when running the jet ski at 5000 RPMs or higher and I'm wondering if at that point the rectifier though new isn't working properly or could this be a bad stator just throwing ideas out there don't know
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post #5 of 14 (permalink) Old 07-03-2019, 06:57 PM Thread Starter
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just wanted to make a slight correction.... I meant when I'm reading it and holding it at 3500 RPMs she's Within the Volt range.... I said when I'm idling at 3500 and that's not what I meant.
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post #6 of 14 (permalink) Old 07-03-2019, 07:57 PM Thread Starter
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Okay update so I charge the battery meter read 12.9... I put the key in two beeps hear the usual spraying sound and I hit the button and she still turning over as if she has a weak battery and won't start dump a little premix directly into her hit the button she turns over as if her battery was a bit weak and starts right up and stays running until I turn her off. I put a voltmeter on her while she was running 13.9 while she was idling and climb to 14.51 when revving her. Turned her off and try to restart her acted like a weak battery cracked a few times but wouldn't start. I'm at a loss
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post #7 of 14 (permalink) Old 07-04-2019, 05:35 AM
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What is the battery voltage when cranking ? Should be around 11 or better. Starting to sound like a bad battery. The whole system needs a minimum amount of voltage to start, and if that isn't present, then you get what you have. Standing voltage of a battery really doesn't tell a lot other than it may not be charged. You can have a standing voltage of 12.5, but as soon as you put a load on it, it can fall to nothing. Amperage is what we need.
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post #8 of 14 (permalink) Old 07-04-2019, 09:03 AM Thread Starter
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I bought three brand new batteries for three different skis so I'll take a battery out of another ski that I know his new also and put it in there. And I'll take the battery that's currently in it and take it to AutoZone and have them check it out. I get it just because it's new doesn't mean that the battery is good there are bad ones right off the shelf. That's how I've been feeling this whole time like it's a battery issue. I'll let you know thank you.
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post #9 of 14 (permalink) Old 07-04-2019, 06:40 PM Thread Starter
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Please tell me what this means! Ok bought another new battery, cleaned injectors and started ski.. it fired right up.. put the hose on her, and she ran at 5000 rpms on and off for 10 minutes and she turned off.. in an attempt to check if I had lost spark I took off the mag side piston to check for spark.. when I hit the start switch she fired right up with no problems. I was shocked.. powered it off...hit the start button again without the mag side spark plug and again she fired right up..what is this? Please don't tell me that the Mac side piston is seizing after it gets hot?
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post #10 of 14 (permalink) Old 07-04-2019, 06:47 PM Thread Starter
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Correction it took the mag side spark plug off not the piston..
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