1966 Merc 650, 65hp 4 cyl., sn# 21096(0?)52. Replaced impeller today, got the LU back on, passed all the shift tests (dry) per Seloc, Clymer and Merc manuals. I'll check it on the muff's tomorrow. Anything I need to look out for? Certain things to watch for? Thanx to you guys I had plenty of...