Top cover removed bearing bad underneath

[Caveman Charlie]

Hi , I have a 1973 Silverline boat with the Mercruiser 140 and stern drive unit. I removed the top cover for inspection just now and the bearing underneath of it has a rough spot on one roller. The race looks bad. It appears that the bearing is pressed on the shaft. Is that true? If it is I plan to just replace the race and hope for the best.

Any suggestions?

I know the proper way would be to take the boat in and have the entire unit rebuilt. The problem with this is that the boat is not worth the cost of having this done. I had to have it done 2 years ago when the gears went out and with used gears the price was still close to 800 bucks.

I would like to replace the rubber O-ring that is under the top cover. What is this O-Ring called? I will order it from here as soon as I can find the name and part number. How should I hold the O-ring in place as I reassemble the cover. Should I use a silicone seal?


Have a nice Day
Caveman Charlie

 

[flipbro]

If the o ring looks decent still buy some permitex aviation sealer and brush it on. I dont recommend replacing just the race and not the bearing. But understand expense wise. Do you have a slide hammer to remove the race?and besure to put all the shims back in. Good luck with it..

 

[Bt Doctur]

pull the bearing off and replace it before you drop rollers into the gears and need a new drive.

 

[Caveman Charlie]

Can I just pry it off , or figure out a way to use a gear puller to get it off, and then just push a new one back on????

 

[flipbro]

I dont think you could do it properly without disassembling.

 

[NHGuy]

I think it requires some careful work to avoid immediate shrapnel production. Check out this link http://boatinfo.no/lib/mercruiser/manuals/mercruiser1.html#/625

 

[NHGuy]

Bearings and gears take information, tools, patience, and usually talent. If you don't follow the protocols or understand what to do you'll likely break stuff. I'm not that versed in gears so I follow the book when I repair them.

 

[Caveman Charlie]

Thank you all for your replies.