Help with Yamaha 50 2 Stroke

it started earlier in the summer. i ran out of gas in my 05- 50 2 stroke. after i added gas, it ran fine until i go to put it on the trailer and when you give it gas, it stalls. i figure i picked up trash in bottom of tank. took it to mech. and he rebilt all 3 carbs…cranked fine, still bogs from time to time when going from in gear to giving throttle, replaced 10micron f/w seperator. friday, did same thing. i disconnected fuel line and flushed fuel and it ran good for a while and then repeated so i flushed fuel line etc. when i make it to full throtle, it runs good. any ideas?

I had the same problem that I posted below in the forum. The ethanol ate out my fuel cables causing tiny pieces of rubber from the lines to get into the carbs. Check the fuel lines. If they are white inside replace them.
Hope this helps