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  1. #1

    Weird Battery Issue??

    2003 ultra 150
    Ski started and ran great for 2-3 hours.
    Hard riding, lots of jumping and spins and WOT.

    Towards the end of the day I went for one last cruise at about 2/3 throttle 45-50mph for about 5mins and
    The ski just suddenly died on me. I tried to start it back up immediately and it wouldn't even crank. Of course the battery light was flashing so I assumed my battery had died or something was wrong with the battery. I sat for a few minutes and tried it again and it started right up and ran 150yards or so then died again. Same deal. Tried to start it right away and it wouldn't even turn over. Waited 3-4 minutes, and it would start and run another 100 yards or so and die. i limped it home like this and put on trailer.

    Admittedly the battery is a few seasons old and is probably on its last legs. I'm going to replace it and hopefully this will solve the problem but I just wanted to ask if anyone else had this problem because it's so strange. I've never heard of a battery dying mid-run in 2/3 throttle.

    Any ideas??? Is it just a battery or connection or could it be more serious??

    thanks in advance!!!


  2. #2
    steve45's Avatar
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    I would guess a loose connection somewhere. Could be a battery terminal, loose ground on the engine, etc.

    Check the battery voltage before you replace it, should be at least 12 volts, preferably around 12.6 volts.

  3. #3
    Thanks Steve. I hooked it to my charger when I got home and it read exactly 12.0v 50%.
    Think I should replace?

    I'll go thru the connections and report back. Thanks!!!

  4. #4
    Well the battery is taking a charge and I'm beginning to think it's not a battery problem. All Connections appear to be tight.

    Doing some more research and found several folks with a similar issue.
    I opened up the rear electrical box and found it was very wet and moist inside and the starter switch terminals were totally corroded. I'm betting this had something to do with my problem. I ordered a new starter switch solenoid and voltage a regulator to throw in it. Figured it couldn't hurt and they are easy to change.

    If it's not these then maybe my rectifier is bad?

    Question- let's say it is the starter switch or regulator or rectifier, would one of these cause the problem I described in the initial post? Seems odd an electrical gremlin like this would stop a ski running perfectly at speed. I don't fully understand what these parts all do. I can see how they might cause a starting issue but seems odd they would all the sudden stop a ski running at speed. Maybe the water got in that box and shorted something out.

  5. #5

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    Quote Originally Posted by Cracky View Post
    2003 ultra 150
    Ski started and ran great for 2-3 hours.
    Hard riding, lots of jumping and spins and WOT.

    Towards the end of the day I went for one last cruise at about 2/3 throttle 45-50mph for about 5mins and
    The ski just suddenly died on me. I tried to start it back up immediately and it wouldn't even crank. Of course the battery light was flashing so I assumed my battery had died or something was wrong with the battery. I sat for a few minutes and tried it again and it started right up and ran 150yards or so then died again. Same deal. Tried to start it right away and it wouldn't even turn over. Waited 3-4 minutes, and it would start and run another 100 yards or so and die. i limped it home like this and put on trailer.

    Admittedly the battery is a few seasons old and is probably on its last legs. I'm going to replace it and hopefully this will solve the problem but I just wanted to ask if anyone else had this problem because it's so strange. I've never heard of a battery dying mid-run in 2/3 throttle.

    Any ideas??? Is it just a battery or connection or could it be more serious??

    thanks in advance!!!
    A quick way to eliminate battery or terminals is volt drop test.

    While trying to crank engine measure voltage on battery post and then battery terminal. A difference in voltage between the two means the terminal is dirty or loose (if very loose/dirty it would feel hot to touch)

    Same test will show if starter relay/solenoid has faulty contacts ie measure the voltage on relay/solenoid terminals both should be same)

    If a battery suddenly loses charge and above test shows a voltage below 9 volts then I would replace battery regardless if recovers after recharging.

    A specialist battery depots will check your battery ie Battery world.
    Last edited by ange5583; 05-24-2014 at 02:16 PM.

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