no need break in!!
Gary all ready did it for me: 1660rpm/20X8 Zinger

maybe i need to setup the carb hi/low, this also determent the fuel/air mixture meaning-> it will affect the amount of gas going into the engine this way will effect the TEMP as well!?

any way, pat & Joe,
i will to a test according to your recommendations:
i'll take 3 cans of 1000cc gas, each one with a different mixture, 64;80&100:1 ratio
and see what is the best performance regarding temp,rpm and prop
i will use a thermocouple temp sensor.

i will keep u posted naturally

BB
gadi