Warranty? Have you called MC dealer? They may have some way to do it without splitting the tub out of the boat.
Be more specific on how/why it cracked. I figured they'd be indestructible unless not winterized with a bunch of water left in.
'06 X2 MCX
"I understand why some people may not want to do this the way I have recommended but I can't understand the death grip some people have on a toilet plunger with a hose fitting." -JimN