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shuemanMale Offline
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Post Icon Posted: Jan. 16 2007,3:32 pm Post # 1 see this member send this member a private message  quote this post in reply
Looked at an old pontoon today that's been floating on Big Bear Lake for a quite a few summers.  The Alpha outdrive is "white spotted" all over with galvanic corrosion.

The question would be:  can the outdrive be sanded down, primed and painted, install an anode, and be good to go, or...will the entire case/shell need to be replaced..??

I'm also wondering if the corrosion is on the inside as well, despite an annual service record.
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Post Icon Posted: Jan. 16 2007,3:43 pm Post # 2 see this member send this member a private message  quote this post in reply
My guess would be, it depends on how bad that it is....And how the gear lube looks.

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Post Icon Posted: Jan. 16 2007,5:19 pm Post # 3 see this member send this member a private message  quote this post in reply
It was "spotted" all over, with not any big patches, that I could see.  Even the Dophin Fin had spots on it... :eek
If I go back, I'll get some pix.  The engine itself was spotless, the whole inside of the cover was spotless/clean.
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Post Icon Posted: Jan. 17 2007,4:38 am Post # 4 see this member send this member a private message  quote this post in reply
Seen that quite a bit, I've known some to take it and bead blast and powdercoat it, done deal!.. :good
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Post Icon Posted: Jan. 17 2007,7:03 am Post # 5 see this member send this member a private message  quote this post in reply
That woould probably be the best way. The only down side is the cost involved in the disassembly and reassembly of the drive.

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Post Icon Posted: Jan. 17 2007,7:08 am Post # 6 see this member send this member a private message  quote this post in reply
Quote (Carrera Elite @ Jan. 16 2007,4:43 pm)
My guess would be, it depends on how bad that it is....And how the gear lube looks.

The quality of the gear lube coming out is the big deal......Surface corrosion is no big deal as long as the pitting is minimal....Blast and Powder coat...great idea!!... :good

As long as the internals were well maintained you should be good to go....I have pulled off many outdrives that looked like crap on the outside, but were perfect on the inside. Always used the appearance of the outdrive to negotiate a better deal if the insides were ok....Folks just let 'em sit and corrode, makes 'em look like crap but they are still new on the inside!  :good

Make sure you have the steering and throttle linkages/cables checked out too!

Good Luck!!!   :beer



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Post Icon Posted: Jan. 23 2007,9:21 am Post # 7 see this member send this member a private message  quote this post in reply
I've cleaned up quite a few outboards over the years...in fact I've got a Johnson 90 sitting out back that needs tending to now that I think of it...

If it's just the lower drive, sometimes you can just sand it out and repaint without disassembling the whole unit. Just make sure it hasn't gone clear through the case. :D

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GoFastRacerMale Offline
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Post Icon Posted: Jan. 25 2007,4:41 am Post # 8 see this member send this member a private message  quote this post in reply
Quote (GlassMan @ Jan. 23 2007,10:21 am)
Just make sure it hasn't gone clear through the case. :D

I have seen them where you could push the sides in from corrosion over the years, they were paper thin!. :eek
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Post Icon Posted: Nov. 12 2007,3:26 am Post # 9 see this member send this member a private message  quote this post in reply
Quote (GoFastRacer @ Jan. 25 2007,4:41 am)
Quote (GlassMan @ Jan. 23 2007,10:21 am)
Just make sure it hasn't gone clear through the case. :D

I have seen them where you could push the sides in from corrosion over the years, they were paper thin!. :eek

I'd be interested in seeing how bad the insides of one was, if it was eaten up that bad on the outside.  I know outside appearance isn't really a great indicator of what the insde looks like. But if it was that bad, I would bet it had problems inside too!

As far as the original poster's question goes, as someone else has stated, if it isn't pitted very much or at all, just check the gear lube.  As long as it doesn't look milky or have a burnt smell to it, it should be just fine.  You can take care of the outside looks with some work.  Also, another good indicator of how the lower unit is to see how much slack it has in it when you engage the gears.  I've seen outboards sit in the water for several years here in VA and back home in TN, and some in water that had high mineral content, and they still performed just as well as ones that came out of the water after every use.  My parents' first or second houseboat had been in the water for 7 or 8 years, and it still ran as well as any I've ever seen.

Edited by stlrcoach on Nov. 12 2007,3:26 am
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