Would be very grateful for insight/experience with the following --
Found about a 2" crack in port-side exhaust manifold on '84 Wellcraft
(200 elite 260HP merc Runs horizontal, center, sort of low. Little bit
of rust, water seepage. Evidently been there awhile...

Few questions from stupid ?? dept.:

-- Worst case scenario?? How urgent is need to fix?
-- How big of a repair job is it? Time/effort/cost... (Other stuff
that'll need fixed due to this)
-- Any recommendations on DIY vs shop


THANKS in advance

STB