I recently acquired a 2-stroke mercury 4.5 hp. Although the engine starts at first pull, and runs nicely at medium throttle, after about 20-30 minutes the engine stalls. After a short wait, a minute or so, the engine restarts without a problem, but after 20-30 mins stalls again, etc. Also, the engine only runs smoothly at full carb. I haven't a clue what the cause could be.<br />Any suggestions welcome!
