My experience with Moki(s) is that they have poor fuel draw. You have to have the tank as close to the carb as possible. Also the pressure feed nipple must be kept clean and open.

I would use them in non 3-D flying but would hesiste to have one as a prop-hanging-driver. The mixture would need to be on the rich side for sustained vertical and then it would load-up in level flight.

A Cline regulator will fix the problem.

Regards,

Ex-Pat-Eric...