1971 Mercury 650 parts

C

cskip58

Recruit
Joined
Mar 11, 2006
Messages
2
This is my first time posting here so I hope I'm doing this right. I have inherited a 1971 Mercury 650 ser # 2998131 that I am hoping to get back in top shape. I just want to check with you guys on part # and make sure I am ordering the right parts.

Prop shaft seals # 26-76868

Internal wiring harness #52771A2

washers for the lower unit grease fill & vent screws 12-191833

I am handy with tools and do most all of my auto and small engine repairs but I have never worked on a outboard before other than changing plugs and lower unit grease. I will need to replace all the wiring as it is all just crumbling at the touch. I figure if I take my time and replace one wire at the time I should be able to get through this. The motor has been in the family since my Dad bought it new in early 1972. It has been garage kept and has never been left in the water overnight. I think that it is in very good mechanical shape and I want to get it back to top shape. Any and all help and or suggestions will be greatly appreciated.

P.S. I bought a seloc manual for this motor but it seems a little vague on some things.

Thanks to all
 
redjmp

redjmp

Chief Petty Officer
Joined
Mar 16, 2005
Messages
536
Re: 1971 Mercury 650 parts

You may need more than just shaft seals to stop that bottom end from leaking.
Those have just plain old steel shafts that rust and the seals actually wear grooves in them. You might have to take them out and have them rewelded and machined or speedi sleeves installed. The cheap way out is to pump grease in there as it will take the water a lot longer to dispace it than 90w oil.
 
J

jebeebe

Petty Officer 1st Class
Joined
Nov 26, 2006
Messages
322
Re: 1971 Mercury 650 parts

just a thought. On the switch box merc has embossed wire colors to keep down the possibility of wire switching, so check that the colors match what is on the switchbox. I found the previous owner switched two wires on mine and caused major greif when I put mine back together. Had two cyl fireing at wrong time. Plug wires were right but modules were fireing wrong.
 
C

cskip58

Recruit
Joined
Mar 11, 2006
Messages
2
Re: 1971 Mercury 650 parts

Thanks Guys. I will be sure to check the shaft when I pull the old seals. And yes, the switch box is color coded which should make the job a lot easier. The biggest concern I have are the three wires coming from the distributer to the switch box are in bad shape. Can they be replaced without replacing the whole distributer. right now I will order the lower unit seals and the wiring harness and get to work. after that I will address the dist. issue.
Thanks Again for the help.
 
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