6
BREAK IN
READ SECTION THOROUGHLY BEFORE PROCEEDING WITH BREAK IN.
It is recommended that the first hours of operation should only be performed with the help of
someone with good experience in the operation of two cycle engines mounted in experimental
aircraft. It would be further beneficial for this person to be knowledgeable in the area of
carburetor tuning for this type of engine.
Ensure that engine installation is complete and as per installation instructions.
Ensure that all systems are correct, functional, safe, etc.
Ensure that you have read and complied with all appropriate information. Further, that you
understand what you, as owner and/or operator are responsible for.
THE BREAK IN PROCEDURE MUST BE PERFORMED WITH THE ENGINE
PROPERLY INSTALLED AS PER INSTALLATION INSTRUCTIONS. FURTHER, THE
PROPELLER MUST BE INSTALLED AND PITCHED TO MAKE NEAR MAXIMUM
RATED RPM YET NOT ALLOW THE ENGINE TO OVERSPEED.
NOTE:
For free-air cooled engines, it is critical that proper steps be taken to ensure adequate cooling.
Refer to section in this manual regarding starting procedure.
Take care not to jerk the engine rpm up and down. Increase and decrease rpm smoothly. It
will eventually be necessary to increase RPM instantly as well as decrease instantly in order
to properly set carburetors, however, this type of carb tuning is best left until the engine has
been properly run in.
Make carburetor adjustments as necessary.
If at any time problems arise, shut down the engine, find the cause and rectify.
Take care not to let the engine idle for too long as an extended low power setting can cause
unnecessary carbon deposits.
In the first 10 hours of operation, run in the engine with due care. It should not be revved up
or overloaded unnecessarily.
Summary of Contents for F-23
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