Topic: 1975 Mercury 650 lower unit assembly – Page 2

This topic has 17 replies, 4 voices, and was last updated 10 years, 2 months ago by dave-bernard.

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May 31, 2015 at 8:20 pm #17302
dave-bernard
Participant
US Member
Yes it is it is preloaded with the spring and follower.
June 1, 2015 at 12:26 am #17317
hag
Participant
Yes I kinda thought so but same time not putting any shims in was wondering it it was too tight on the shifter rod. But if it was too tight on the shifter rod it would not be so smooth spinning on the drive shaft/pinion gear. So I think I’m good.
June 1, 2015 at 9:24 am #17337
billw
Participant
US Member
So you were Merc-a-fied. That’s why I almost never try to swap parts around on Mercurys. They made so many tiny, seemingly insignificant changes that it’s just not worth my aggravation. Sounds like you found another one.

Long live American manufacturing!
June 1, 2015 at 9:28 am #17338
hag
Participant
Yup. I ordered the part number based on the carrier. I guess same carrier used in different motors with different reverse gears. I mean a very slight difference in the gears. Oh well live and learn.
August 19, 2015 at 5:29 pm #22340
hag
Participant
Update:
finally got it in the water and worked great up until last day of use up north in Canada. Lost reverse and oil leak (this occurred after I rescued a novice who flipped his canoe in the middle of the lake- good deeds!)

I guessed the circular nut holding bearing carrier had slipped and when I got it off I was right.
The problem I think is that the prior owner/ repair man strip the threads on the housing itself. Also I had bought new nut but was made of a hard plastic compound.
I just ordered new Oem nut and a nut holder tab too.

Question is how to better reinforce or secure the nut to the housing after tightening it and folding down the tabs given the threads are worn and stripped on the housing. Epoxy/jb weld/lock tight?
August 19, 2015 at 6:48 pm #22342
dave-bernard
Participant
US Member
drill and pin it from the side. drill all the way thru the nut and use a roll pin that way when you need to remove it just tap it on thru. just a thought I have not had to do it yet.
August 20, 2015 at 6:03 am #22392
hag
Participant
I was thinking about that too. Thinking 2 small screw on opposite sides. Unscrew it if need to remove it.

What do you mean by roll pin?
August 20, 2015 at 1:14 pm #22396
dave-bernard
Participant
US Member
split pin if that helps. if you use screws use allen so nothing sticks out and use loctite.
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