Hello,
I have a 1996 Ebbtide 185 with a 4.3L carbureted Mercruiser that cracked the block and replaced with a used 2007 MarinePower 4.3L MPFI with a MEFI-4. The engine will not start without giving the TB full open by hand. I've replaced all injectors, both fuel pumps, plugs, cap, rotor, and...