New, second hand tinny - pinholes

[Jezza94]

Hi guys,

Took my new second hand Stacer SeaSprite out today and I was terrified to find that it had taken on a couple of cm of water on a 4 hour outing.

Upon inspection when I got home, I found half a dozen pinholes in the stern floor below the transom, only 2 of them seem to be leaking water after filling with water and red dye.

I've checked for stray metal under the floors and came across a split shot but I'm not sure if my mate dropped it or not.

All the wining seems to be grounded back to the motor and the transom has a rubber mat between the outboard and transom

What else could cause this? The rest of the hull is sound.

If it's of any consequence, the battery and fuel tank is mounted on the rear floor...

I was thinking of shooting in to Bunnings tomorrow to get some Sikaflex and ally rivets and just drill out the 2 problematic holes but I was wondering if that's the right way to go about it.

Cheers, Jeremy

[Tackleberry]

Nope not the right way to go about it take it to an aluminium fabrication place preferably one that does marine work and get them to weld it up or you will have more trouble .
pop rivets are a different grade of aluminium and that's classified as a dissimilar metal and will also cause galvanic corrosion .

[fishnut]

Nope not the right way to go about it take it to an aluminium fabrication place preferably one that does marine work and get them to weld it up or you will have more trouble .
pop rivets are a different grade of aluminium and that's classified as a dissimilar metal and will also cause galvanic corrosion .

If you decide to use pop rivets the normal ones will leak,you will have to use blind/sealed rivets

[Mattblack]

Take it back to the dealer

[colnick]

Hi guys,

Took my new second hand Stacer SeaSprite out today and I was terrified to find that it had taken on a couple of cm of water on a 4 hour outing.

Upon inspection when I got home, I found half a dozen pinholes in the stern floor below the transom, only 2 of them seem to be leaking water after filling with water and red dye.

I've checked for stray metal under the floors and came across a split shot but I'm not sure if my mate dropped it or not.

All the wining seems to be grounded back to the motor and the transom has a rubber mat between the outboard and transom

What else could cause this? The rest of the hull is sound.

If it's of any consequence, the battery and fuel tank is mounted on the rear floor...

I was thinking of shooting in to Bunnings tomorrow to get some Sikaflex and ally rivets and just drill out the 2 problematic holes but I was wondering if that's the right way to go about it.

Cheers, Jeremy

Bit disappointing with a new purchase Jezza. My 20 year old Quintrex Explorer developed half a dozen pinholes, all in the floor section between the rear thwart and the transom, so all pretty accessible. I reckon they were caused by me being lazy and allowing salt water to lie in in the channels in the aluminium.
I attacked mine using fibreglass tape which fits neatly in the grooves and is almost invisible once resined into place. It's probably not the most professional approach but it's unobtrusive and the boat doesn't leak any more.
For what it's worth, Col.

[KeenAds]

Hi guys,

Took my new second hand Stacer SeaSprite out today and I was terrified to find that it had taken on a couple of cm of water on a 4 hour outing.

Upon inspection when I got home, I found half a dozen pinholes in the stern floor below the transom, only 2 of them seem to be leaking water after filling with water and red dye.

I've checked for stray metal under the floors and came across a split shot but I'm not sure if my mate dropped it or not.

All the wining seems to be grounded back to the motor and the transom has a rubber mat between the outboard and transom

What else could cause this? The rest of the hull is sound.

If it's of any consequence, the battery and fuel tank is mounted on the rear floor...

I was thinking of shooting in to Bunnings tomorrow to get some Sikaflex and ally rivets and just drill out the 2 problematic holes but I was wondering if that's the right way to go about it.

Cheers, Jeremy

Getting it welded up is the only way to fix it properly, there are many aluminum welders that specialise in marine repairs across Melbourne.

If however you want to do it cheaply you can use a product called Devcon which is an epoxy putty that you can apply and then sand back and paint.

[Catchin]

The pinholes refered to in the post are they caused by electrolysis or something else

[purple5ive]

You can get metal repair paste/compounds in most hardware stores nowdays.
Just get something like jb weld or similar and use that..