Optimax help

[Mark215]

What year are the opti's. I've read online and experienced my own problems with these engines. Our boat had 1999 engines and the previous owner had good amount of hours on them without any issues until one day and problems just started. Had a really good merc guy come down and look at them and he advised us not to sink anymore $$$$$ into them. They seem to have a lot of problems with these engines in the late 90s.