Hi. Newish to boating and I made a blunder. While trying to change the oil in our Honda 20hp outboard I inadvertently drained the gearbox oil, then added a quart of oil to the engine oil. Now the engine oil is probably double what it should be. To complicate things I can’t unscrew the engine oil drain plug! I’ve not run the engine and I’m wondering if that much oil sitting in the engine, until I can drain it, will cause problems. Plus I have to now go get gearbox oil. The boat isn’t in the water yet for the season. Any help would be much appreciated.
thanks.

 

Drain everything and refill. See what you get.