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Is it worth side gapping spark plugs in 95 HX?

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Location
Ohio
Water Crafts
1992 Seadoo XP
#1
I'm just curious if there is any benefit to side gapping BR8ES spark plugs in a Rotax 717. Supposedly, they do this in racing because it allows for a more complete burn of the air-fuel mixture since the ground electrode isn't covering the spark.
 


mikidymac

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California
Water Crafts
2003 GTI
2001 XP
1996 XP
1996 HX
1991 Superjet
2001 Superjet
#2
No, just set them to the correct gap per the manual and enjoy your HX.
 
Messages
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Location
Grimsby Ontario
Water Crafts
96 XP 800 Limited Class
#3
I'm just curious if there is any benefit to side gapping BR8ES spark plugs in a Rotax 717. Supposedly, they do this in racing because it allows for a more complete burn of the air-fuel mixture since the ground electrode isn't covering the spark.
If you are not racing, and trying to squeeze every rpm out of it, I agree, just ride and enjoy.
 
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#4
I don't think you'll notice a difference but yes some do take this approach. I don't see a need.

The theory as I understand is the spark more easily jumps from the corners of the electrodes as opposed to between flat surfaces.

I think if the plug is fouling too quickly, something about the tune, fuel quality or oil type is causing it and depending on circumstances might be damaging your engine.
 

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