Yamaha F4A Manuel D'utilisation page 60

EMU00233
Run the engine under load (in gear with a
propeller installed) as follows.
1) For the first hour of operation:
Run the engine at 2,000 r/min or at
approximately half throttle.
000826
2) For the second hour of operation:
Run the engine at 3,000 r/min or at
approximately three-quarter throttle,
and during this period run it at full
throttle for approximately one minute
every ten minutes.
000827
3) For the next eight hours of operation:
Avoid continuous operation at full
throttle for more than five minutes at
a time.
4) After these first 10 hours:
Operate the engine normally.
000828
3-8
GB