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  1. #21
    Click avatar for tech links/info K447's Avatar
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    Has this engine ever run properly for you?

    Sometimes (sometimes) the flywheel magnets can magnetically weaken. When this happens the stator coil AC voltages are weaker than normal. This does not happen often but we do see reports now and then. The fix is to replace the flywheel.

    Not saying your flywheel has gone bad. But keep it in mind as a possibility.

  2. #22
    raiderteen's Avatar
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    Quote Originally Posted by K447 View Post
    Has this engine ever run properly for you?

    Sometimes (sometimes) the flywheel magnets can magnetically weaken. When this happens the stator coil AC voltages are weaker than normal. This does not happen often but we do see reports now and then. The fix is to replace the flywheel.

    Not saying your flywheel has gone bad. But keep it in mind as a possibility.

    Was brought to me in this condition. *EDIT: And supposedly ran last season.*

    Its only the second Polaris I have ever worked on. First one being a Fuji motor with a bad stator that would only idle.

    I have heard of that with flywheels. Especially on the Ficht DI motors. I will be sure to inspect the flywheel once it is removed. And keep that in mind as a possibility.

    How likely is it that the CDI is bad? I've only ever encountered CDI boxes that quit all together. Whereas this one is still sending voltage to the ignition coil and "functioning". It is just sending a low voltage to the primary side which is keeping it from producing spark energy at the plugs...

  3. #23
    Click avatar for tech links/info K447's Avatar
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    Quote Originally Posted by raiderteen View Post
    ...
    I have heard of that with flywheels. Especially on the Ficht DI motors.

    I will be sure to inspect the flywheel once it is removed. And keep that in mind as a possibility.

    How likely is it that the CDI is bad? ...
    The six magnet Ficht DI flywheels sometimes have the individual magnets break loose and cause damage, not a change in magnet strength.

    The carb flywheels have a single large ring of magnetic material. Unless you have another flywheel to compare with it might be difficult to tell whether the ring magnet has weakened.

    Red engine CDI can fail in a number of ways, with varying symptoms.

  4. #24
    raiderteen's Avatar
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    Quote Originally Posted by K447 View Post
    The six magnet Ficht DI flywheels sometimes have the individual magnets break loose and cause damage, not a change in magnet strength.

    The carb flywheels have a single large ring of magnetic material. Unless you have another flywheel to compare with it might be difficult to tell whether the ring magnet has weakened.

    Red engine CDI can fail in a number of ways, with varying symptoms.

    Unfortunately I don't have another to compare to...we will find out if the stator or CDI are to blame in time. I've got a replacement OEM stator out of a running ski on the way.

  5. #25
    raiderteen's Avatar
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    Welp, the stator was not it. Attempting to find a decent priced cdi now...

  6. #26
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    Quote Originally Posted by K447 View Post
    Late style 700 - is that Gen III CDI/stator with the single ignition coil?

    What are the ‘full voltages’ for Gen I ?
    Yes, gen3 single coil and plastic connector outside the ebox.

    The full voltage raises about another 10 volts with full rpms. I guess what I meant is the gen1 cranking and idle voltages are the same. Cranking produces a full idle voltage whereas on the updated and gen3 it DOES NOT.


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