yamaha 50 hp 4stroke

[<takis>]

I have a 2 year old outboard with 180 hours on the meter.
The problem started some time ago on low revs the engine was not right . After some time I found out that No 1 cylinder was not working.The plug is firing the carb is clean the valves are ok. The workshop tells me that the nedles in the carb ? need to change but It does not sound right. Now I don't know what to do.
Any sugestion anybody??????????

[<boats.net>]

Normally you don't have to change carb "needles"(not sure what needles you are talking about) unless they are damaged or can't be cleaned