I am new to YS and have just got a new 110 15x8 os type F plug all in znlines synergy 90 3D go the engine from them too. Oh 25% cool power fuel.

i set up the engine on the ground not adjusting the regulator, and got a nice idle and hs setting but was quite rich to run the engine in. After runing 3 14oz tanks and getting used to the engine (etc). i flew the model but on landing and powering up to go around the engine heisitated but did pick up, on the second time around it died on the power up.

is it the regulator or low speed valve??