i have a 525 block (original mercury racing 525)but converted it with a blower from blower shop
it has double carburator on top engine 0 hours should make 700 hp
is complete with exhaust price 10.000 euro
nico
had the block as a spare the engines never failed so the extra block was waste of money Had the parts spare from other engines to complete it
can be fitt on a bravo