well its been a while since ive mad a post so here goes; besides owning a 85 v20 i/o i also run a 97 proline 2510 with twin 200 merc o/b s. i bought this boat used. in97 it was bought at a repo auction. iwas pleased that the engines were efi .i havehad no problems just turn keys theystart .no bending over to squeeze te primer bowes, no fludded carbs, no fouled plugs, they dont smoke, they dont load up etc etc etc. now you get the picture.my efi engines work with the same principals as a car engine .so dont get scared when looking at efi, hpdi out boards