Troubleshooting Guide - Losi EVOLUTION 62GX Mode D'emploi

Starting and Running the Engine
It is critical to the proper operation of your 62GX
that you use the included filtered clunk. Fuel
should be fi ltered in your fueling system before
it enters your model. Failure to properly fi lter the
fuel before it reaches your engine can introduce
contamination into the fuel system.
1. Power ON the radio system but leave the
engine power system OFF.
2. Close the choke valve on the carburetor.
3. Move the throttle trim to the center position
and keep the throttle stick at idle.
4. Power ON the engine power system.
5. Rotate the propeller until it is against
compression. Flip the propeller through
compression until the engine fi res.

Troubleshooting Guide

If the Engine Does Not Start
• Check and use a new spark plug if needed.
Remove the spark plug and reinstall it into
the ignition plug cap. With the engine power
system ON, move the sensor magnet past the
sensor quickly (by fl ipping prop or manually
moving the sensor past the magnet). You
should be able to either see the spark or
hear the clicking of the spark plug fi ring.
The engine RPM needs to exceed 180 RPM
before the ignition system will fi re the spark
plug. Make sure to rapidly move the magnet
past the sensor when checking for proper
operation.
• Check fuel lines for damage or kinks. If any
of the lines are restricted, the fuel system will
likely not operate. Clean and intact lines are
essential for the system to operate properly.
• Check for proper mechanical function by
turning the engine over.
• Check that the carburetor is correctly
installed and that all gaskets are intact and
undamaged.
• Check that the vent line is attached and free
from any bends or blockages.
If the engine runs erratically
• Check for fuel systems problems. Are there
any holes in the fuel lines (inluding the clunk
line inside the fuel tank) or other possible
sources of air leaks?
• Ensure the ignition system is working properly
and the ignition system battery is charged.
6. Open choke valve on the carburetor and
repeat step 5 until the engine starts.
7. Let the engine run at high idle for 30 seconds
to stabilize the temperatures.
8. Lower the throttle trim to your desired idle
setting.
If the engine doesn't start quickly
9. If the engine appears not to have any fuel,
repeat the priming procedure in step 2—5.
Mechanical Faults
If you suspect the engine is fl ooded:
1. Remove the spark plug.
2. Cover the cylinder head with a cloth or
paper towel and turn the propeller over to
expel the excess fuel.
3. Replace the spark plug and try starting
again.
If the engine cannot be turned over easily:
• A possible cause is the piston is seized
in the cylinder: loosen and unscrew the
muffl er bolts. Visually inspect the piston and
cylinder through the exhaust port. If there
are excessive/deep scratches or grooves in
the piston, please contact Horizon Hobby
Customer Support for more information.
Repair of a seized piston/cylinder is
mechanical and should not be attempted.
Mechanical repairs must ALWAYS be completed
by an authorized Horizon Hobby service center.
Maintenance
After each fl ying session, fully drain the fuel from
the tank.
If you need additional help or have any questions,
please call Horizon's Support Team. Horizon has
trained technicians who are qualifi ed to answer
your engine questions.
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