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First place I checked no dice tyCheck Yumbo.
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Well that gives me something else to consider if no pressure in tank and it is leaking there ty for the heads up on that . I’ll check the parts diagram to see location of seal to see if I should attempt it . TyHi,
Sorry this happened to you. A real bummer for sure!
I'm not an "ex-spurt" (a drip that was, at one time, under pressure) but I've repaired a few on the smaller twins....ie: BF8D, BF20D and they are similar to the one for the 50hp.
There shouldn't be any pressure in the tank that I'm aware of unless a peculiar seal failure might cause something like that. I don't know if that's a possibility or not.
But, to save $1,400,. I would definitely give an epoxy repair a try. You would need to get the crack completely clean of any oil for the epoxy to adhere properly but I do think it would work.
I also think that the new replacement offered will fit if it comes to that. Again though, just my opinion.
Hopefully others here with more experience will answer and offer their thoughts.
Hoping you get it sorted out without too much more grief.
Good luck.