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Am I expecting too much?

Loaded sled tonight… fouled a plug. Put it in reverse at 83 degrees, died a few seconds after it restarted. Does the 850 tend to foul plugs when the sled is shut off and then restarted before getting up over 100 degrees or so?

Seems like my 2019 850 did that, same with this sled.
 
Loaded sled tonight… fouled a plug. Put it in reverse at 83 degrees, died a few seconds after it restarted. Does the 850 tend to foul plugs when the sled is shut off and then restarted before getting up over 100 degrees or so?

Seems like my 2019 850 did that, same with this sled.
Mine does
 
Loaded sled tonight… fouled a plug. Put it in reverse at 83 degrees, died a few seconds after it restarted. Does the 850 tend to foul plugs when the sled is shut off and then restarted before getting up over 100 degrees or so?

Seems like my 2019 850 did that, same with this sled.

Yes, but not exclusively. Track which cylinders foul for a pattern. I have been finding a few defective coil packs helping cause this issue as well.

Test them all you want, you’ll never be able to duplicate the intermittent drop outs of spark.

Btw, Do you need a go fund me for some plugs? I can help if you do.
 
Loaded sled tonight… fouled a plug. Put it in reverse at 83 degrees, died a few seconds after it restarted. Does the 850 tend to foul plugs when the sled is shut off and then restarted before getting up over 100 degrees or so?

Seems like my 2019 850 did that, same with this sled.
I haven’t changed a spark plug since 2017 when I went back to Doo.
 
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