carbon on sparkplugs

[losttrail]

have a 2006 yamaha 50hp 2cy checked sparkplugs and there was a little carbon on the plugs is this normal or should i be conscerned?

[robert graham]

It's normal for 2 stroke motors to put some carbon on plugs...

[99yam40]

That is why they recommend replacing then , how long have you had them running in the motor?