The motor starts easily,runs great at idle,Problem is when going full throttle it sometimes just bogs down and only runs 1/2-1/3 power/speed.The carb has been cleaned and kited,The fuel lines from inlet to pump have been replaced with new the fuel line from pump to carb also new.I have tried a fuel line that off another 15 that runs great also tried that fuel tank. When I give it full throttle it may take off BUT It may not.Got me stumped??