Nytro cuts out

jaydaniels

TY 4 Stroke Junkie
Joined
Dec 10, 2008
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Location
Bedford NS Canada
Country
Canada
Snowmobile
2017 Sidewinder RTX
im taking a look at a sled for a friend. His nytro cuts out and loses power at 5000rpm. It's like a stumble similar to when TORS activates. Coils and stator all check out fine. Just looking for some ideas on what to check. Seems to work ok when cold but as soon as it's warm the stumble starts.
 
Here is a picture of the plugs. 2 of the 3 appear to be lean.
 

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Actually 2 look good and one looks a little rich. A nice tan colour indicates it's happy.:)
 
I was having the same issue with mine last year. Check the coil resistance when they are hot. You will have to run the sled till it starts to stumble. Then pop the colis and test resistance. Another issue I have with mine was the 2 wire connectors that connected the coil were loose fitting. Use a scriber and bend the little tabs to get a better connection. also put some die electric geese on the plugs there. good luck.
 


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