i was given a 65 hp mercuary on a alunimun 15 ft. boat checked comp was 120lb.on each cylinder it has ben sitting for aprox. 7 years it is firing on all 3 cylinders . put oil in the cylinders spraid gass mixture in the carbs spun it over with the starter . all gass lines have deterated got the carbs off letting them soak in carb cleane .it is a 1974 .i wil replace the waterpump if it runs ok and change the foot oil . is there anything else i should do on this enguin.