try this....
I use a single edge razor blade and pull away from the ports. If you wipe it[ the razor] after each pull most of the junk will stay out of the engine. Also if you can work so the parts are on the side, things will fall away from the engine thanks ro nature. If you have a air compresser you can always give it a shot of air to clean it off as well. The most important thing when you do ANY repair work is "CHANGE the oil" I will start it up,run it for five minutes,to break it in,shut it off at speed,and drain the oil and change the filter. This is also a good time to look at the plugs to see if you are running lean or rich. Yes five minutes is time enought to color the plugs so you can read them...Good luck....Rich