Hi, just started to run my 160 , filled the tank, choked the carb, 5 turns on the prop, gave it the glow , started first time on the starter, ran the tank out. 2nd tank, same thing,leaned top end to max rpm, then backed of 2 clicks.Its now maxes out at 8300. ticks over at 2000. & starts first time. Great powefull engine. Running on 10% coolpower, slimline muffler, 20 x6 carbon prop .paul.