Yamaha Outboard F15A F9.9C, FT9.9D F15 Service Manual, Page 142Get this manual
Quality of the image is intentionally reduced!
INSP ADJ
GENERAL
Anode 1 Inspect: Anode (engine) Anode (lower unit) Scales CleanOilgrease CleanExcessive wear (half worn)damage Replace
Do not oil, grease or paint the anode,