When I come in for a landing and cut the throttle the engine stops. This has only happened the last few times I have taken it out. The engine is an MDS and I fly a Hangar 9 Extra Easy Trainer. It has been very dependable until the last few go arounds. The engine seems fine on take off and during flight. Anyone have any ideas? Too lean, too rich. If so what should I adjust and by how much?

Thanks