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for another full tank of fuel. Be careful not to maneuver it too harshly or
use any more than half throttle.
To adjust the high speed needle valve, carefully turn the high speed needle
valve clockwise 1/8 of a turn at a time. This allows the engine to run
faster and at a higher pitch sound. Your vehicle will now run faster and
smoother.
Steering
When you begin operating your AfterBurner, it might be wise to hold the
radio horizontal to the ground with the wheel side up. Then the wheel acts
like a steering wheel in a car (see Figure 15). Turn the wheel right and the
car goes right. Turn the wheel left and the car goes left. If you fi nd your
AfterBurner going to one direction or another without any steering input,
you will need to adjust the steering trim. Simply turn the steering trim
knob in the opposite direction that the AfterBurner is pulling (See Steering
Trim on page 7). If the vehicle requires excessive amounts of trim, check
for damage, loose parts or excessive wear in the steering parts.
Once you are able to keep the engine running (with the glow plug
ignitor attached if necessary) at a reliable ultra-rich idle, run two full
tanks of fuel through the engine at the rich idle setting.
If the cylinder head temperature gets too hot (260 degrees F), shut
down the engine, let it cool completely and start again.
After you complete the break in, the low speed needle valve can now
be adjusted for performance. Start by running the throttle at idle
for 2 seconds. Then apply full throttle briefl y and carefully listen
to the engine. If it accelerates slowly with lots of smoke and liquid
drops of fuel, your air-fuel mix is too rich and you should turn the
low speed needle valve clockwise 1/8 of a turn at a time until the
engine accelerates briskly and reliably. Retest the throttle after each
adjustment.
After this is set correctly, slowly increase the engine speed to
approximately 50% of full throttle. Adjust the high speed needle
valve so the engine again runs as richly as possible. (You actually
want it to be producing lots of oily smoke and spitting oil droplets
from the exhaust).
Run your AfterBurner on a smooth surface at low to medium speed
10
Your First Run
Steering
Your First Run