I just bought a 16' Grumman with 93 Evinrude 50hp. Model #E50TLETB. Runs fine at high speed, but the idle is a bit rough and it will stall after a bit. ( I know you've heard this before. lol) Tried adjusting the idle mix and got some improvement in the rough idle but it still stalls. I thinking the carbs need to be rebuilt. What do you think? Also any info. on this engine I.E. know issues, and reliability. Would greatly appreciated. Got A manual on the way. All in all it seems in good shape other than the idle issue.