|
|
Posts: 865
| Hi Guys, I hope one of you may have an answer for me. I was called up this afternoon and asked to go over a friends house. He has a boat that has many tiny holes in the back of the Aluminum transom. We counted about 18 Holes in the transom . Some were as small as the diameter of a pin and some were 4 times that size. The transoms wood seems to be ok but the aluminum surrounding the transom has these holes in it. He said this Aluminum boat was used for stripers in Salt Water several years in a row, but never left in the water. Someone told him it was a voltage ground problem in the boat, and a dealer told him it could be caused by the glue they used to adhere the Aluminum to the wood on the Transom.. He said the glue had a reaction to the Aluminum. If anyone has seen this or know what it may be caused by please let me know.. I am going to try and help him repair and resolve this problem...Thanks Mike
k / |
|
| |
|
Posts: 3504
Location: Elk River, Minnesota | Hiya,
That sounds a lot like salt water electrolysis. It hapens when there is not any sort of sacrificial anode attached that is designed to deal with the electolysis. From what I understand, all outboard motors now come with a zinc anode that needs replacement here and there when used in salt water environments.
Steve
|
|
| |
|
Posts: 865
| Hi Steve, Do You Know if once the motor is removed, will it get worse? or remain the same. He his a new motor that has the anode on it. Mike |
|
| |
|
Posts: 3504
Location: Elk River, Minnesota | With the new motor it should be ok... The only thing I would be worried about is if the wood core has taken on salt water.
|
|
| |
|
Posts: 865
| salt water electrolysis is what it looks like according to the Internet. Fortunately the wood seems to be fine, so I may just drill each hole individually with a little larger drill bit than the hole to clean the hole, and remove any corrosion... Then lightly countersink the area and apply an epoxy or marine sealant sand flush......and then paint with an approved Aluminum safe Primer and Paint |
|
| |
|
Location: 31 | Sure sounds like electolysis. I see that with mixed roof metals flashings... tiny holes in the aluminium flashing. |
|
| |
|
Posts: 865
| very scary isn't it.. Now they are saying all aluminum boats should have an magnesium anode attached to it in freshwater. |
|
| |
|
Posts: 532
| Just like everyone else is saying salt water electrolysis is most likely.
I am just curious, did the wood in the transom ever get replaced on this boat? I have seen peoples boats who have rebuilt their transoms with treated wood and had some bad corrosion happening on their aluminum. Just wondering |
|
| |
|
Posts: 865
| No the wood was never replaced that he knows of....He just bought this a few months ago and stored for the winter. But I heard the exact same thing, I was told the different Glues somehow had an adverse effect on the thin Aluminum transom cover...Looked at it carefully last night and it appears that the wood in the transom is somewhat expanded like it could have absorbed and held some water..... |
|
| |
