Can I put a 1973 50hp lower unit with a preload pin on shaft top onto 1976 50 hp? Thanks
P PleasantleaFarm Recruit Joined Sep 2, 2012 Messages 2 Sep 2, 2012 #1 Can I put a 1973 50hp lower unit with a preload pin on shaft top onto 1976 50 hp? Thanks
C Chris1956 Supreme Mariner Joined Mar 25, 2004 Messages 28,873 Sep 3, 2012 #2 Re: 1973 500 lower unit on 1978 500 I have never tried it, but most Merc motors have lots of interchangeablilty on gearcases. The preload pin is a gearcase feature, not a motor feature, so that is not an issue. Are the splines and the driveshaft length the same?
Re: 1973 500 lower unit on 1978 500 I have never tried it, but most Merc motors have lots of interchangeablilty on gearcases. The preload pin is a gearcase feature, not a motor feature, so that is not an issue. Are the splines and the driveshaft length the same?
P PleasantleaFarm Recruit Joined Sep 2, 2012 Messages 2 Sep 3, 2012 #3 Re: 1973 500 lower unit on 1978 500 Thanks for the response. It does fit. Preload pin on drive shaft was frozen and causing my problem. Freed it up and all fits properly now.
Re: 1973 500 lower unit on 1978 500 Thanks for the response. It does fit. Preload pin on drive shaft was frozen and causing my problem. Freed it up and all fits properly now.
