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nkorep2
05-16-2012, 01:54 PM
So Im working on a 1990 prostar, it has a velvet drive with 1.52 reduction unit. As the story goes, the transmission was underwater when the previous owner bought the boat, and thus decided to pull it and rebuild it. Seem like all the parts are there, but some of the gears have rust on them. The drive gear assembly for example has rust.

https://lh6.googleusercontent.com/-xx9ioZnyqWQ/T6dDwMN23lI/AAAAAAAACCQ/-cZLZZ5fH0U/s640/2012-05-06_21-27-49_889.jpg

Is there a way to figure out what corrosion is "fatal" and what I dont need to worry about too much. Im thinking that a lot of the corrosion may be in areas that arent vital.

Any help is greatly appreciated, as Id like to begin assembly on this unit as soon as possible.

Thanks,
Nikolai

nkorep2
05-17-2012, 01:26 PM
One person said if the corrosion is on the outside, and the surfaces where a seal or a bearing are supposed to be are good, then you should be alright. Anyone have any thoughts?

CantRepeat
05-17-2012, 01:36 PM
That is the end of the input shaft and it will always be exposed to the elements. I would take some WD40 and slightly worn out green scotch bright pad and clean it up.

I think you'll be fine.

NatesGr8
05-17-2012, 03:19 PM
Agreed, if its just surface rust with no major pitting then you should be fine. Also as long as there is not any rust or pitting where bearings and seals sit then you will be okay. While you have everything apart you should check for cracks at any of the sharp corners and radii of the shafts and gears.

nkorep2
05-17-2012, 07:29 PM
Perfect, thanks guys.