Old Yamaha Outboard Tacho Yamaha Outboard Problem, Are They Good?

Yamaha outboard problem, are they good? - old yamaha outboard tacho

I bought a new boat on Saturday I was having to deal with mechanical problems with my old boat much tired, was a new boat 2004 60 hp Yamaha 4-stroke with only 40 hours, I was very angry the next day, when she wouldnt get up to speed, wouldnt go 2200 rpm and was suffocated by the gas, "said the dealer boat SA for 2 years so that it can be carbohydrates? Are they good Yamaha engines, or should I worry? Thanks