My weed eater lawn mower will start and idle fine but whenever I engage the bades the lawn mower will almost cut off and then go back to full power. What could my problem be?

Are you engaging the blades at idle rpm? This is hard on the engine if you are.

are you engaging the blades at idle rpm? this is hard on the engine if you are.

No the mower is running at full throttle when the blades are engaged.