8
SOME THINGS TO REMEMBER DURING BREAK-IN
1. Run with the body off. This will keep the engine cooler.
2. Keep the air cleaner on at ALL times
3. Run on a smooth, hard surface. An empty parking lot
is perfect.
4. Use the same fuel that you will use for normal running.
5. Resist the urge to accelerate and decelerate quickly.
6. Break-in puts stress on the glow plug and can burn it out.
Make sure you have an extra plug or two on hand.
7. Do NOT overheat the engine (see page 9).You can check the
head temperature by using one of the temperature gauges
that are readily available (DuraTrax
™
Flashpoint, DTXP3100).
TANK 1
Your first tank of fuel should be running the Warhead at a
very rich needle valve setting. This allows the fuel to carry
as much oil as possible into the engine to properly lubricate
the internal parts during the break-in.
1. Open the high speed needle valve 4 turns from fully
closed (counterclockwise). This is factory set already, but
check it to make sure. When closing the high-speed
needle, close until you feel some resistance. DO NOT
overtighten or you will damage the engine.
2. Fill the tank to the “starting fuel level” line (half-full).
3. Start the engine. Once warm (about 1 minute, fill the tank
to full.
4. Run the truck on a smooth surface with the body off.
5. Run back and forth at medium speeds, slowly accelerating
and decelerating the truck. NOTE: It is normal for the two
speed not to shift (see page 10).
6. Run the truck until the tank is almost out of fuel. Do not allow
the tank to run out of fuel. This leans out the engine and can
cause overheating.
7. Stop the engine and allow it to cool. This normally takes
around 10-15 minutes.
TIP! Think of a clock face: 1/12 turn = one hour increment.
TANK 2
Lean the high-speed needle 1/12
turn (one hour) from “tank 1”
setting. Run the truck for the
complete tank and then let cool.
TANK 3
Lean the high-speed needle another 1/12 turn from “tank 2”
setting. Run the truck for the complete tank and then let cool.
TANK 4
Lean the high-speed needle another 1/12 turn from “tank 3”
setting. Run the truck for the complete tank and then let cool.
You should notice the engine running much better at this point.
TANK 5
Lean the high-speed needle another 1/12 turn from “tank 4”
setting. Run the truck for the complete tank and then let cool.
After the fifth tank, the engine is now ready to be tuned
for best performance.
TUNING TIPS
After break-in, run the truck where you plan to do most of your
driving (grass, street, track, etc). Tune the high speed needle
so the engine makes good power without overheating. Using
a temperature gauge, tune the engine so that it will
consistently stay under 270° F (132° C). Keep in mind, RC
engines usually take a minute or two to warm up. It is common
not to reach full power right away. Never tune a cold engine!
If needed, tune the low speed needle so that the truck idles
and accelerates smoothly and consistently. Note: If you lean
the low speed needle, you may need to richen the high
speed needle. The idle stop screw should be adjusted so
that the wheels do not turn when you lift the truck.
ENGINE CARE
Never store your Warhead with fuel in the tank. We
recommend that after the final run of the day, you empty the
fuel tank and then run the engine at idle until all the fuel is out
of the fuel lines and engine. Remove the air filter and glow
plug. Then place two drops of Hobbico
®
After Run Engine Oil
(HCAP3000) in the carburetor and two into the cylinder to help
prevent corrosion. Pull the recoil a few times to circulate the oil.
10 WAYS TO ENSURE LONG LIFE FROM YOUR ENGINE
1. Keep your engine and air filter clean. Dirt will act as
insulation on an engine. It will not be able to shed heat as
easily. Clean and re-oil the element often.
2. Do not over-lean your engine.
3. Do not run your engine with little or no load. Don’t throttle
up the engine to full throttle when the wheels are not in
contact with the ground.
4. Do not overheat the engine (see page 9).
5. Do not use a fuel with a low oil content. Make sure you
use a model car fuel from a reputable manufacturer, such
as O’Donnell Fuels.
6. Avoid using old fuels in the engine.
7. Do not use a fuel with a nitromethane (often called nitro)
content over 20%.
8. Do not scratch the piston or cylinder sleeve. Avoid
jamming something into the exhaust port when removing
or re-installing the clutch or flywheel. Use a special tool
called the Ultimate Flywheel Wrench (DTXR1105) to
keep the crankshaft from moving.
9. Do not use silicone sealer on the engine joints. Silicone
sealer contains acetic acid, which is corrosive if it gets
inside your engine.
10. Do not allow any water to get inside the engine.This sounds
easy, but temperature changes can cause condensation
inside the engine. This is a good reason to use an after-run
oil. Store your engine inside the house, not in a garage or
shed where there will be temperature extremes.
BREAK IN
BREAK IN
PR
PR
OCEDURE
OCEDURE
