I know this may seem a dumb question but I honestly don’t know. 2017 Z3 ballast tanks and bags. I bought my boat last year used. I’m still learning about everything but are there ballast tanks under the back floor? I have rear bags and then additional plug in bags in storage. But how do I know if I have hidden tanks under the back deck/floors? I’ve got a leaking bag so I’m going to replace the rear bags.
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