i would say you can not hand start the opti 200, for one it needs to turn over almost a revolution before it starts so i dont reckon it would hand start, plus there is nothing on it i have seen for manual starting, plus it likes a big battery so handstarting must be a no no
plus if something had been submerged it would be difficult to start anyway so unless you are jeff capes or mr universe i reckon you have no chance
two summers ago i saw a smaller merc 90 get submerged
they righted it, got it onto land, took the plugs out, kept spinning it over an evenentulaly got it started and then spent the next week and a half waterskiing behind it. but they used the starter motor all the time to turn it over
time is of the essence in these things i believe and a lot of luck