ON MY OS 35 Max S R/Cengine I have noticed the shaft in front buy the thrust washer has some side play if I twist the prop side to side by hand, is this normal on an engine , it also after about 2 minutes of running needs another richer needle valve turn a few clicks , and then at full throttle its just dying and stalls could it just be worn with the side play [cold engine] and blowing out the oil at he front shaft, and Im useing a regular puller prop while Im trying to get it to run and I dont want it to over heat on the ground?????