Techsarge,
I have 2 GP Cubs, both with 4 stroke engines. I use PSP Manufacturing's fuel dots. (www.PSPMFG.com) They come in 2 sizes and in different colors. I never have any problem with flooding the engine and it's easy to de-fuel with them also. I use a second line and clunk in the tank for the 3 (fill) line, but that is just my personal preference.

Russ