Burning rich in one pistion f200

[fishingdave]

I pulled the plug today to winterize the motor and i notice the top right spark plug seem to be burning rich. the motor is an 05 with 82 hours on it.. i purchased this year with 60 hours on it. Any ideas? the motor ran fine all summer long..

dave

[mitch]

injector stuck /

[fishingdave]

can i do a seafoam shock treatment to repair this , or do i need to get an new injector? the motor has been running great so far.