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I use BR9EYA's in my SDI.
 

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per Doo updated for 06, all sdi's br8ecs

prior to this all sdi's were to use br9ecs (not br9ecs5 = 800's)
 

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MXZonly said:
Just wanted to see if these are the right plugs for the sdi's?
[snapback]686743[/snapback]​
For an SDI, you want a plug gapped at .031". I beleive what you have is gapped at .018". The first SDI sleds came with BR9ECS plugs, but at some point in the '06 model year they switched to the BR8ECS.

I've found the following info on NGK plugs:

BR9ECS:

The 4771 and 6669 are solid top plugs gapped at .018.

The 4677 is a solid top plug and is gapped at .031.

The 3570 is also gapped at .031, but is a screw top plug.

BR8ECS:

The 4172 is gapped .031.

Here is a link to a thread, which in turn contains some more links, all of which contain info on which ski-doo engines use which plugs...
 
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