I am currently building/renovating my first "gasser", a Bucker Jungmann scratch built 1/4 scale and will use a DLA 32cc gas engine . The CDI module (from a DLE engine) states that battery voltage should be 4.8-6.0V which is not easily achieved in practice.
A 4 cell NiMH could certainly fall below 4.8V and a newly charged 5 cell NiMH will certainly start off well above 6.0V. Without load a 5 cell NiMH will initially give

over 7V...

..!!
How do you manage this guys..??!?? Please advice - thank you.!