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My 2000 Ficht 200hp started throwing soft codes 81 thru 86 when I used NGK plugs. I replaced the plugs with the proper champion plugs. They are indexed perfectly and the motor runs great! I have cleared the codes manually multiple times but they codes keep happening every time I get up to about 1600-1800 RPM. I am going to replace plug wires and buff the coil connectors clean.
Any other thoughts out there?
Any other thoughts out there?