Yamaha F100B F100C Outboards Factory Service Manual, Page 34Get this manual
GEN INFO
General information
4Run the outboard motor for one hour at 2,000 rmin or at half throttle, then for another hour at 3,000 rmin or at 34 throttle5Check that the outboard motor does not tilt up when shifting into reverse and that water does not flow in over the transomNOTE: The test run is part of the break-in operationS60C1234
Break-in
During the test run, perform the break-in operation in the following three stages1One hour at 2,000 rmin or at approximately half throttle