Predator 90 no spark. HELP! - Polaris Riders


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Old 04-27-2008, 11:08 PM   #1 (permalink)
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Default Predator 90 no spark. HELP!

Son went to start his quad today and it would not start. I tried and it fired for about 10 seconds then quit. Did the usual stuff and found it had no spark. Tried several plugs and nothing. I am the worst when it comes to diagnosing electrical problems so I need some suggestions. I checked the fuse by the battery traced as many wires as I could to make sure there was not a wire grounding somewhere. So how do I determine if it is the Stator, coil or something else. It cranks fine and when cranking it will light up the small headlights (only work when engine is running)

All help appreciated.
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Old 04-27-2008, 11:22 PM   #2 (permalink)
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ok, turn the key off then back on, turn the kill switchoff then back on to make sure they engage. make sure the power wire did not come off the coil. These are things that have happened to me on my quads.
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Old 04-27-2008, 11:29 PM   #3 (permalink)
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my son has a 04 pred90 and it did the same thing right after i got it,so i took it back to the dealer and they had to replace a little box under the seat but i dont remember what they called it,but it fixed the problem
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Old 04-28-2008, 11:00 AM   #4 (permalink)
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Cage fighter im pretty sure thats the cdi.on most 03,04,05s its the stator that usually goes out.once i saw like three of them in two days come into the shop for new stators.
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Old 04-28-2008, 11:04 AM   #5 (permalink)
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yep...probably stator or coil.
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Old 04-28-2008, 11:51 AM   #6 (permalink)
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I tried the stock CDI and still no spark. The electric start will not operate if the kill switch or tether is pulled so I think those are both good since the starter works.

Is there a way to determine if it is either the stator or the coil? My first instinct was the stator since coils usually do not go out very often. But since it lights the headlights when turning over it means the stator windings are still good doesn't it, or can something else go out on a stator affecting spark to the plug?


EDIT: It started!! Since I had all the plastic engine cowl off and fan off, (pred 90 engine is covered with plastic cowl to direct the fan air), I was going to wash it down. I cleaned the accumulated muck off of the cylinder cooling fins and hosed down the stator and pickup really good. A little dirt came out but not much. For the heck of it I hit the stator and it fired right up!! So I guess there was something interfering with the stator pickup??

Thanks for all the help!!
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