the OS engine that comes with your plane will run fine without any of the break in running needed for a new out of the box engine,when the manual says run it rich they are referencing the high speed needle as long as smoke and a little fuel is coming out the pipe when you fly the plane and you get idle to full throttle transition your fine.

the engine has been run once and pre-broke in before installation in the plane and you should not have to go through the break in procedure described in the engine manual just run the engine slightly rich for a few flights.the manual is included because you have a new engine and need to learn what each part does and proper maint. for good running the planes inst. states you do not need to do a break in run.

OS engines have a simple break in procedure to follow when you buy a new one, your plane"s engine has been done for you make sure you have a knowledgable helper to make sure your plane checks out radio and engine runs idle to full speed and have some fun.