2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 39Get this manual
Predelivery checks Break-in
In the test run, the break-in operation is performed in the following three stages1One hour at 2,000 rlmin or at approximately half throttle2One hour at 3,000 rlmin or 34 throttle and one minute out of every ten at full throttleEight hours at any speed, however, avoid running at full speed for more than five minutesS62Y1580