Results 1 to 7 of 7
  1. #1

    Mercury Lower Unit Tools

    What tools are needed to disassemble a Mercury Sportmaster Lower Unit and where can I get them?

  2. #2
    The only things you need to disassemble it are the spanner for the ring nut that holds the bearing carrier, the spanner socket for the ring nut that is under the water pump and the spanner socket for the shift shaft bushing. It's nice to have the spline nut to hold the drive shaft when removing the pinion nut. There are a bunch of tools required to set the gears up correctly. All available from Mercury dealers and some from aftermarket but the first tool I recomend is the factory manual. It has all the tools part numbers and how they are used.


    98 Laveycraft Sebring 20.2 Tunnel 280 "catchin" motor. 90s? It's enough for me!

  3. #3
    Where can I get the Manual from?

  4. #4
    Join Date
    Apr 2004
    Location
    CRYSTAL RIVER, FLA
    Posts
    2,988
    Put a post in parts wanted or look on Ebay for one.

  5. #5
    Quote Originally Posted by MUFC777 View Post
    Where can I get the Manual from?
    Also available from a Merc dealer. I did find a PDF version on line one time but didn't keep the link. Do a search with Mr. Google...


    98 Laveycraft Sebring 20.2 Tunnel 280 "catchin" motor. 90s? It's enough for me!

  6. #6
    Join Date
    Jul 2002
    Location
    FT WORTH, TEXAS
    Posts
    6,115
    you need gearcase cover nut tool which is the carrier nut tool to get started , depending on how stuck the carrier is you may have to have the slidehammer to get it out BE sure you have the right jaws if they are too long they will scar up the threads badly, then you will need the shift shaft tool to remove it so the propshaft can come out , then you will need the bearing retainer nut removal tool to get the round threaded nut off the drive shaft then you will need a 7/8 socket on a break over to hold the pinion nut while you turn the drive shaft with the drive shaft holder tool i use an impact on this because it torqued to 75/85 lbs or supposed to be. that will get you stripped

  7. #7
    Join Date
    Jul 2002
    Location
    FT WORTH, TEXAS
    Posts
    6,115
    you can buy all these tools thru pro marine if you like ill give you the part numbers . keep in mind there are a lot of factors in a successful Sporty rebuild they are the hardest one to build period .i have built hundreds of lowers

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Aeromarine Research