Starting Issues

[ivany]

So, my GS has developed starting issues as of late. Sometimes, it will refuse to start. It'll crank away and after 5-10 crank it'll backfire very nice. This seems to indicate it's getting fuel just fine, but no spark. I pulled the plugs and they look healthy. I noticed today that it started without issue, but then after washing it, it refused to start. So I'm thinking it might be related to condensation/water shorting something out. Any places to start looking? Thanks!

[mister]

Pull your plugs and fire them on the head. So you can see if they are sparking.

Michael