A 9.9 or 15 hp OMc Johnson or Evinrude 2 cycle 1980'2 short shaft (15") weighs 72 lbs, 77 lbs for a long shaft (20').
The OMC 8 hp and 6 hp weigh 56 for the 15, and 58 1/2 for the 20".
Keep all your old catalogues, they're invaluable for reference work!
Joe. :teeth :thup