I don't get it ... my engines will all flip start, only my Saito needs an electric starter as it tends to start reverse. I use a paint brush handle as a chicken stick or just back flip by turning on the spinner. It fine on my TT46, ST G90, YS110, Rossi 45, TT61 ... some patience in tuning helps.

Also ... I used to hv an RC car and my first had a pull start mechanism, they will eventually break.