2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 117Get this manual
I I.i) I FUEL
Fuel system
Synchronizing the carburetors
Start the engine and warm it up for minutes to check the stability of the engineAttach the special service tool to the high-tension cord #1 CD
Inductive self-powered tachometer: YU-08036-B Digital tachometer: 90890-06760 3Remove all of the plugs and attach the special service tool and adapters to the carburetor assembly as shownS62Y4400