I am working on a Yamaha 9.9 that I am having trouble identifying the year and model. The model/serial tag is missing, due to a transom clamp replacement at some point. The only number I can find is on the freeze plug which is 559244. It does have a sticker to show it takes NGK B7HS-10 plugs as well as a sticker on the front saying 100:1 fuel mix. Is there another location for the model and serial numbers? Anyone able to lookup the year or any other info? 