old p200

hi,can anyone give me some info on a rather old looking Yamaha p200 the number on the cover is g621071 the colour is cream,if possible i would like to know the approx age and hp size,it looks like a 10 or 15 maybe ,how would it perform,i have it on a 15ft mayland fishing boat which is quite light, have had it going it sounds really good not tried it in the water yet,and are there spare parts still available. thanks in advance.

lee