Mercruiser and SEI upper unit gear wear??

Todd4n

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May 16, 2012
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I bought a 1995 Wellcraft with the 5.7 L Mercruiser back in August 2011. The previous owner hit bottom and had a dealer put a SEI outdrive on. In April 2012 I took the boat in for a new throttle cable and they had pointed out that the upper unit gears have some wear which will eventually fail in time. I decided to have them throw on a brand new mercruiser outdrive. Attached are pictures of both the SEI and Mercruiser. The gear wear sure looks pretty similar. Is it pretty normal?

Your thoughts would be appreciated.
 

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Fishermark

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Re: Mercruiser and SEI upper unit gear wear??

I decided to have them throw on a brand new mercruiser outdrive.

That's seems a bit of overkill to me. If it were me I would at least talk to SEI and see if they will cover it under warranty. But it is your money!

The pros will have to comment on the wear and give their opinion as to whether it is normal or not.
 

Don S

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Re: Mercruiser and SEI upper unit gear wear??

Hard to tell in those picture. They will all get shiny and show wear, that's normal. The surface of the gears are flame hardened. The problem comes if there are pits in the hard facing of the gears where the contact pattern is.
 

a1nowell

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Re: Mercruiser and SEI upper unit gear wear??

I believe SEI gives a 3 year warranty.

Larry
 

Don S

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Re: Mercruiser and SEI upper unit gear wear??

I believe SEI gives a 3 year warranty.

Larry

Not if you didn't buy the drive. His drive was on the boat when he bought it.
 

Bondo

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Re: Mercruiser and SEI upper unit gear wear??

I bought a 1995 Wellcraft with the 5.7 L Mercruiser back in August 2011. The previous owner hit bottom and had a dealer put a SEI outdrive on. In April 2012 I took the boat in for a new throttle cable and they had pointed out that the upper unit gears have some wear which will eventually fail in time. I decided to have them throw on a brand new mercruiser outdrive. Attached are pictures of both the SEI and Mercruiser. The gear wear sure looks pretty similar. Is it pretty normal?

Your thoughts would be appreciated.

Ayuh,.... Welcome Aboard,.... You need to find a Different Marina,....

Which picture is which,..?? they both look Fine to me...
 

Don S

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Re: Mercruiser and SEI upper unit gear wear??

Which picture is which,..?? they both look Fine to me...
Look at the names of the pictures. Just above the close button. One is Merc, one is SEI
 

Bondo

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Re: Mercruiser and SEI upper unit gear wear??

Look at the names of the pictures. Just above the close button. One is Merc, one is SEI

Duh,.... :facepalm:
 
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