SLAYER PRO 4X4 • 35
3. With the fuel tank empty and the throttle at the idle position, try to
start the engine. The engine will most likely start and run for a few
seconds as it uses up any fuel remaining in the engine and fuel lines.
4. Once the engine stops, clean the outside of the engine with
compressed air or spray motor cleaner. Once the engine is clean and
dry, remove the glow plug power wire, glow plug, and air filter.
5. Open the throttle fully and spray a one-second burst of WD-40 into
the carburetor and into the glow plug hole (Caution! Wear safety
glasses to prevent spray from getting into your eyes). If you are using
after-run oil, follow the manufacturer’s instructions.
6. Place a rag or paper towel over the engine to catch any WD-40 or
after-run oil that may come out the carburetor or glow plug hole.
7. Connect the EZ-Start controller to the model and spin the engine for
10 seconds.
8. Remove the rag or paper towel and repeat steps 5–7 two
more times.
9. Clean and re-oil the air filter so it will be ready for use next time. See
page 19 for air filter maintenance instructions.
10.
Replace the glow plug, reconnect the glow plug power wire, and
reinstall the air filter.
Clearing a Flooded Engine
If the engine is primed for too long during startup, then it can become
flooded with fuel. When the engine is flooded it will no longer turn due to
excess fuel in the combustion chamber preventing upward movement of
the piston. Use the following procedure to clear a flooded engine:
1. Remove the blue glow plug wire.
2. Remove the glow plug and gasket with the glow plug wrench supplied
with your model. A 5/16 or 8mm nut driver will also work.
3. Turn the model upside down and plug in the EZ-Start controller.
4. Push the EZ-Start button for several seconds to clear the engine
of excess fuel. Do not look into the glow plug hole while the
engine is spinning or you could spray fuel into your face!
5. Turn the model over and reinstall the glow plug and gasket.
6. Reconnect the blue glow plug wire to the glow plug.
7. Reconnect the EZ-Start controller.
8. Do not prime the engine. Pull the throttle to 1/2 throttle and push the
EZ-Start button. The engine should start immediately.
Piston stuck at “top dead center” (TDC)
“Top dead center” is the position where the piston is at the very top of
the tapered sleeve. Occasionally an engine can get “stuck” at this position.
This is most likely to happen on new engines during break-in, but can
also happen at other times. If the engine is stuck at TDC, use the following
procedure to release the piston from the sleeve:
1. Remove the glow plug using the included tool
or 8mm (5/16”) nut driver and verify that the
piston is at the top of its stroke.
2. Turn the Slayer Pro 4x4 over and locate the
flywheel through the cutout in the chassis.
Insert a flat blade screwdriver as shown
between the chassis and flywheel. Using
the chassis for leverage, rotate the flywheel
counterclockwise by pressing down on the
screwdriver. The flywheel will turn, unsticking the
piston from the sleeve.
3. Put two or three drops of light machine oil into
the glow plug hole to lubricate the piston and
sleeve. Do not use too much oil. It will hydro-lock
the engine. Verify the starter will spin the engine
with the glow plug out.
4. Rotate the flywheel so the piston is at bottom
dead center and replace the glow plug and
gasket. Reconnect the blue glow plug wire.
5. You should now be able to start the engine
with the EZ-Start
.
Denatured alcohol (available
from home centers and
paint supply stores) in a
spray bottle is an extremely
effective cleaner. Be sure
to wear safety glasses and
gloves when working with
denatured alcohol.
Be sure to follow proper
maintenance and storage
procedures to avoid damage
to your engine and other
components of your Slayer
Pro 4x4.
Don’t put the fuel from your
tank back into your fuel
jug. Dispose of it properly,
following city or county
regulations.
Always wear eye protection
when using compressed
air or spray cleaners and
lubricants.
Top Dead Center
Bottom Dead Center
MAINTAINING AND STORING YOUR SLAYER PRO 4X4
