Upper driveshaft bearing issues on Alpha 1 Gen 2

bigcanoe

bigcanoe

Cadet
Joined
Mar 28, 2011
Messages
7
Lost the lower unit last season and started triage. Driveshaft snapped just below water pump. I pulled the whole unit to check upper drive as well and the upper driveshaft bearing has pitting in the race. Should I just replace the bearing and race, or look for further "issues", or just replace the whole drive unit? The sickening part is there were only 80 hours on this drive.
 
achris

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Re: Upper driveshaft bearing issues on Alpha 1 Gen 2

Any idea why the drive shaft sheared? That would be the basis of a 'repair or replace' question for me...
 
Don S

Don S

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Messages
62,321
Re: Upper driveshaft bearing issues on Alpha 1 Gen 2

the upper driveshaft bearing has pitting in the race.
Click to expand...

Water causes rust, rust causes pitting.
 
Bondo

Bondo

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Apr 17, 2002
Messages
71,449
Re: Upper driveshaft bearing issues on Alpha 1 Gen 2

or just replace the whole drive unit?
Click to expand...
Ayuh,... I would...
An SEI drive is cheaper to buy new, than the usual repair costs of an Alpha drive...
 
bigcanoe

bigcanoe

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Joined
Mar 28, 2011
Messages
7
Re: Upper driveshaft bearing issues on Alpha 1 Gen 2

I believe the shaft sheared from damage done after underwater strike. initially didn't look too bad from the prop. We got 2 more trips out of it, but the last trip involved an overly large wake and misjudgment on my part. got some air and 5 minutes later no go. As for the pitting I found no evidence of water... just plenty of fine metal.
 
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