• Chaos
www.sportwerksRC.com
Once the Engine Starts
1. Set the throttle trim to a high idle. The carburetor is a single-
needle design so there is only one adjustment. The factory setting
is purposely set rich (lots of smoke and unburned fuel exiting the
exhaust pipe).
2. Drive the Chaos around a large, open parking lot. During this
break-in period, it may be more convenient to leave the glow
igniter attached in order to keep the engine running more reliably.
During this initial run, the engine response should be “sluggish”
and the speed relatively slow.
3. After the first tank of fuel is consumed, you may lean the high-
speed needle (turn clockwise) 1/8 turn at a time until optimum
performance is achieved. Do not overheat the engine by
running it too lean or permanent damage will result. If you are
uncomfortable with any of these instructions, you should ask
for help at your local hobby dealer or racetrack. Experienced
modelers are usually very willing to help new people in our
hobby.
4. The engine idle speed can be set using the small Phillips-head
screw located opposite the high-speed needle valve on the
carburetor body.
Note
: We have found in our testing that removing the pressure line
from the tuned pipe can sometimes improve idle and bottom-end
throttle response. To experiment with this, simply cut the fuel line
about 1" from the tuned pipe pressure nipple and block off both
ends of the silicone fuel line with a machine screw. A small piece
of brass tubing can be used as a coupler to reconnect the pressure
line (if desired).
Possible Cause/Solution
• Clogged fuel line
• Bad or improper glow plug
• Glow igniter not charged
• Engine flooded
• Pressure line blocked or disconnected
• Bad glow plug
• High-speed needle too lean
• Hole or tear in fuel line
• Bad glow plug or idle speed set too
low
• Overheated engine (too lean)
• Improper high-speed needle setting
Engine Troubleshooting Guide
Problem
Engine won’t start
Engine starts, then dies
Engine starts and runs
for 1⁄2 tank, then quits
