Evinrude Boat Motor Won't Fire?

i never liked the ois 2000 ignition system. some of the early ones could not even be diagnosed outside due to sunlight interfering with the optical sensor. the proper way to diagnose the system is with omc's special tool.don't have one?me either.peak voltage readings are the best way to check this system without the tool, but a service manual and an ohm meter will go a long way and may find the problem.if you don't have a manual check on cdi ignition's web site,is has a down to earth trouble shooting guide and i recommend their products. i don't remember changing many packs on these engines,but i have changed a few optic sensors. if you do have to remove the flywheel, be VERY careful reinstalling it.it fits into a recess and will try to cut the tips off your fingers as the magnets pull it down.