This boat often leaks at the bungs. Just take out and re seal.
This boat is also as tough as old boots so you don't have to playu it with kid gloves,
The back inspection port should have a gear box inside it which has often come away. Replace pot rivets with bolts and drill a hole in the middle of the lid and tie onto boat.
It is a beach not race boat so check wear on hulls and perhaps put another layer of resin on.
Important to use the rudders properly. IF you go to the Aussie Windrush sites you will find an original manual you can download.
Should have a 5 or 6 to one boom sheeting arrangement.
When you have it sorted ask for some tips to get the best out of it and I can give you plenty.
Photo of my old one included

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