A little too much oil is better than too little. With too much you might smoke extra and you really put too much you could foul your plugs but those aren't catastrophic failures you may run into if you run a bunch to little or no oil at all.

Run fresh non-ethanol gas with some Startron/Stabil/Seafoam and put a fuel filter/water separator in line if you have room.

I fired my boat up for the first time since march the other day. Old gas and it wanted to stutter a bit wot but it started and ran. Used to before the filter/separator and startron I was tearing apart carbs to clean jets every year.

Good luck.