not24- my chinese 2300 also runs VERY well with the stock carb and an apc 16-8 prop. i use 10% omega and it turns 9000-9200 with a slimline quiet style mufller, with the tubes crimped about 1/3 closed. it idles very well for extended periods of 1-3 minutes and then will spool up with no hesitation. it runs smoothly at all engine speeds. just a very boring engine . I run this in my top flite 63 inch p47.

for my warbirds this engine is a super replacement for a 150 or 180 4 stroke. i bought 2 more 2300s, and I also bought a cline regulator. I intend to run one of them inverted in a 120 mustang and if i can't lower the tank c/l to be even with the carb c/l i will use the cline to keep the engine from getting flooded and to get even fuel flow as the tank empties.

ed