Interesting video, he doesn’t seen to have remove any of the bulkheads just the midberth floor from over the tank. Then he removed the entire window assembly to get the tank out. Then reversed the flow to install the new tank. This is promising way to go.
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1995 Maxum 2400 SCR 5.7 A1 G2 LUNA DE MIEL SOLD
1988 Bayliner 2455 5.0 IO (sold)
1987 Seaswerl 18ft C. Cabin 4.3 IO(lost in fire)
2012 South Bay Pontoon