Re: 1967 Merc 60 (6hp) lower Unit Help Home › Forum › Ask A Member › 1967 Merc 60 (6hp) lower Unit Help › Re: 1967 Merc 60 (6hp) lower Unit Help chinewalkerUS Member - 1 Year (includes $3 online payment fee)Replies: 459Topics: 15 April 20, 2018 at 12:51 pm #74367 I’ve done the latter, used a greased tap to retain metal shavings.