When is the last time you changed your spark plugs?
Last summer -- but I hooked up a in-line spark tester between the plug and the plug-wire last night... nothing (only checked the top 2 cylinders as they were easy to get to/see from the console of the boat).
Also checked to make sure the tether switch and neutral switch were working -- looks good. Tether switch tests open when tether is connected. Neutral switch tests closed when boat is in neutral.