I am running 150 twins. Cold Startup is fine, high rpm (1200) idle that comes down to 900-1000 after warmup. Plenty of power, runs smooth thru all rpm range. Problem is after engines have run for a while,are shut down and set for a while,(may be 15minutes or so) the engines start up but will stall when going forward or reverse when trying to give it gas. Sometimes stalls right after they start. I have to quickly apply 1/2 to full throttle to make the engine accept the gas and not stall and then quickly pull back the trottle for normal speed. Once the engines take the gas, the engines run steady and the performance is good again.
