5
3.Use this fuel mixture for approximately 2-3 hours of run time
4.Use a high Octane unleaded fuel (98 Octane is ideal) We suggest
starting the break in process of the engine on a test stand; for
approximately one hour. This time should be used to get familiar with the
engine. Do not run the engine at full throttle for more than ten seconds
during this test stand break in. The reason for this is that you are not
getting the normal cooling effect that you would if the engine was in a
model that was flying.
Note:
For break-in a smaller propeller is recommended.
Important:
1.Remember that when the engine running ever person must stay behind
the line of the rotating propeller; never to the side or the front!
2.The engine needs 12-20 hours running time for the break in process to
be 100% complete.
Engine Cooling
A proper cooling system is vital for any engine. An air cooled engine
requires an appropriately sized air intake. Also to keep this air cooling
process working the incoming air must be exhausted. Further, the exhaust
air outlet should be four times (4X) the size of the cool air intake.
Example:
. 10 square inches of air intake area would require
. 40 square inches of exhaust air outlet area
It is up to you to insure that the air flows freely to, over, and away from,
the hot cylinder(s) and muffler(s). Please refer to Engine Installation for
motor box considerations, and to the following tips on baffling.
Note:
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