O'Donnell SS .21, Manual

Page: 9 / 16

9
PRIMING THE ENGINE
We recommend that you prime your engine before starting it. While
holding the throttle open, place your fi nger over the muffl er outlet
on the tuned pipe and turn the engine over using a starter box for
3–5 seconds or until fuel reaches the carburetor. DO NOT install
your glow starter during priming. Turn your transmitter and receiver
on, install your glow starter and then start your engine. Do not hold
the throttle wide open while starting, use only 1/4-throttle. Allow the
engine to idle for 10–15 seconds before increasing the throttle. If
the engine does not start within 8–10 seconds, remove the glow
plug and check that it and your glow ignitor are working properly.
Note: If you are having problems tuning your engine, we recommend
that you return the needles to the factory settings and make small
tuning adjustments until you achieve the optimal settings for the
particular conditions.
To reset the needles to factory settings, gently close (clockwise) the
needles. Then open (counterclockwise) the needles the designated
number of turns.
Important: Make sure when closing the needles you do not
overtighten. Overtightening the needles can cause damage to
the carburetor.