I appear to only have two cylinders firing. I have a 100 HP Yamaha
4-stroke. I inadvertently reversed the polarity and tried to start it.
We replaced the fuse and it started, but ran rough. today we removed
and cleaned the plugs (too late to get new ones).

Anyone have any words of advice. (my wife is taking care of telling
what MORON I am, so you can skip those emails).

P