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1. Power ON the radio system but leave the
engine power system OFF.
2. Close the choke valve on the carburetor.
3. Move the throle trim to the center posi-
on and keep the throle sck at idle.
4. Power ON the engine power system.
5. Rotate the propeller unl it is against com-
pression. Flip the propeller through com-
pression unl the engine res.
6. Open choke valve on the carburetor and
repeat step 5 unl the engine starts.
7. Let the engine run at high idle for 30 se-
conds to stabilize the temperatures.
8. Lower the throle trim to your desired idle
seng.
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.
• Check for fuel systems problems. Are there
any holes in the fuel lines (inluding the
clunk line inside the fuel tank) or other pos-
sible sources of air leaks?
Iftheenginerunserracally:
• Ensure the ignion system is working
properly and the ignion system baery is
charged
1. Remove the spark plug.
2. Cover the cylinder head with a cloth or
paper towel and turn the propeller over to
Ifyoususpecttheengineisooded:
expel the excess fuel.
3. Replace the spark plug and try starng
again.
• A possible cause is the piston is seized in the
cylinder: loosen and unscrew the muer
bolts. Visually inspect the piston and cylin-
der through the exhaust port. If there are
excessive/deep scratches or grooves in the
If the engine cannot be turned over easily:
piston, please contact Tomahawk Aviaon
Customer Support for more informaon.
Repair of a seized piston/cylinder is mecha-
nical and should not be aempted.
TROUBLESHOOTING GUIDE
• Check and use a new spark plug if needed.
Remove the spark plug and reinstall it into
the ignion plug cap. With the engine pow-
er system ON, move the sensor magnet past
the sensor quickly (by ipping prop or ma-
nually moving the sensor past the magnet).
You should be able to either see the spark
or hear the clicking of the spark plug ring.
The engine RPM needs to exceed 180 RPM
before the ignion system will re the spark
plug. Make sure to rapidly move the magnet
past the sensor when checking for proper
operaon.
• 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 essenal for the system to operate
properly.
• Check for proper mechanical funcon 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 aached and free
from any bends or blockages.
If the engine does not start:
