extent of corrosion on drive internals?

[JackBronson]

Hello,
Came across a boat today that is available. 2006 Four Winns with a Volvo 4.3 engine. engine hours around 300. boat looks to be in good shape, except there is what appears to me (experience: I just sold a 30 year old Mercruiser with basically none) to be a high amount of corrosion on the sterndrive. Didn't get a chance to examine the drive in depth (will do that later depending upon responses to this topic), did get some photos.

I know there is a process for cleaning up and repainting these drives and I will follow those if the time comes. My question is this: how much corrosion could be INSIDE the stern drive? I know not in the sealed areas, but in the fresh water passages?

Seems odd and concerning that a 10 year old boat would have this level of corrosion.

Thanks in advance for the information.

Jack

 

[shaw520]

That doesnt appear to be too awful,... new zincs will reduce corrosion

 

[JackBronson]

Yes I should clarify I mean a high amount of corrosion for a drive that is only 10 years old with 300 hours.

 

[bruceb58]

Is this boat moored? Are all the bonding wires still connected between the pivoting part of the drive and the transom housing.

 

[JackBronson]

Its on a trailer. Don't know its mooring history. I'm guessing based on trailer condition (good) and a hunch that this thing did some time in the water. No bottom paint. I am thinking maybe this was in a marina with some extra bolts floating around the docks/moorings.

Its the extent to anything internal I'm concerned about. I can see all the outside and can roughly figure what I need to do.

 

[mklearl]

Might not have checked zincs every season or there was a serious electrolosis problem at the marina. More cosmetic than anything. I think the internals shold be fine. Good luck.