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  1. #1
    GGG's Avatar
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    Electrical problem with a 98 GS

    The ski starts right up and runs great. After riding it for about 10 min wide open it starts to break up and eventually dies out. The fuel gauge also drops to empty and comes back on. when I go to restart it, I get one long beep until I pull the lanyard out and put it back in. It will then start right up and go for a few minutes until it happens again. Sometimes I get a very short beep just before it dies also

    I swapped the computer, checked all the fuses, checked and cleaned all the grounds, connections at the battery are good. I also ruled out overheating because the engine doesnt get hot and I tried running it with the temp sensor unplugged. It didnt make a difference.

    Also, waves don't seem to affect it in anyway. It will do the same thing on totally flat water
    Any suggestions would be appreciated.


  2. #2
    Mtuned's Avatar
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    Is it getting oil?

  3. #3
    Mtuned's Avatar
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    I know it sounds electrical, but could be lack of oil causing seizure!

  4. #4
    GGG's Avatar
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    That makes sense because the motor sounds like there is nothing left of the bearings inside but why would it immediately start right back up?

  5. #5
    Mtuned's Avatar
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    Well usually after a little while they cool down and start, If yours is restarting right away then this may not be the issue!

    When a 2 stroke has a issue, First thing i do, Easyest imo is do a compression test. Check plugs what do they look like? Are they reading same? To much fuel, not enough.

    If you have replaced everything this may be were to start looking!

    I mean without the ski in front of me, or anyone else here we could guess:

    Key coming disconnected
    Fuel vapor in gas tank
    Top end needs rebuild
    Sucking air in crank
    bad rectifier
    bad computer


    yada yada.

    Give us a compression test result and let us know were you stand! =D We will try do help you the best we can!

  6. #6
    GGG's Avatar
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    I did a compression test already I forgot to add. I also took the carb apart to check for debris and to leak and pop test it. compression was 135. plugs are new also. Im kinda leaning towards coil I'll probably test that next but the thing that has me stumped it the fact that I have to take the key out and put it back in to restart it. That usually means a short loss of power.

    I test rode this thing like 5 times. Im about to take it out on the water and pull the drain plugs

  7. #7
    GGG's Avatar
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    Still having a problem with this ski. I run it wide open for about 10 min straight and it starts breaking up and eventually starts. Most of the time i have to pull the lanyard and plug it back in to start it or I get a long beep. If im able to crank it over without pulling the lanyard then it will crank but not start. So far I have done the fallowing
    compression check
    changed plugs
    changed MPEM
    changed coil
    changed DESS post
    Checked and cleaned all grounds and Positive cable
    checked magneto ground
    added an additional ground from the mag case to the block
    Checked the carbs
    replaced front and rear case seals

    It definitely seems electrical but the only electrical parts I didnt change was the magneto which looks mint and tests good. The problem is I cant test anything because as soon as the machine cools down for 10 min its fine

  8. #8
    Work Harder, Millions on Wellfare Depend On Us! ultramaxracing05's Avatar
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    those damn 720 are known for the stator touching down onto the flywheel, you might have to pop the flywheel out and inspect the coil and flwheel magnets. I'm not saying you have a cracked stator but the windings could be burned. take a look at it.

  9. #9
    GGG's Avatar
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    I took the stator out, it looked in really good shape and there were no signs with contact to the flywheel. but its pretty much the only part of the electrical system I didnt change yet so I guess that next on the list.

  10. #10
    Work Harder, Millions on Wellfare Depend On Us! ultramaxracing05's Avatar
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    were the winding's insulators brown? as in burnt?

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