Losi LOS04002 - Manual (Page 7)

EN 7 LOSI LST XXL 2 • INSTRUCTION MANUAL
Engine Break-In
Breaking in your new engine is critical for proper performance. Failure to follow the break-in procedures can cause engine damage and shortened engine life. Always use a
14:1 gasoline:oil mixture during the break-in process and when running the engine.
If you change fuel or run in dramatically different environments (hot/cold, high/low elevation, etc.) you will need to adjust the carburetor needles to prevent overheating and
maintain proper performance. Never allow the engine to rev freely with the wheels off the ground.
Use the optional Dynamite Pro Temp Gun with Laser Sight (DYNP2000) to check engine temperatures.
Break-In Procedure:
CAUTION: You must complete the break-in process on a smooth surface, such
as pavement or concrete. Do not drive the vehicle on dirt or grass during the
break-in process; doing so will damage the engine.
Priming the Carburetor
Before turning on the vehicle, install the spin-start into the side of the engine. Hold
fi nger over exhaust tip and press spin-start button for one second to prime the
carburetor. Stop spin-start. With spin-start still installed into the side of the engine,
remove fi nger from exhaust tip and press spin-start button for two seconds.
NOTICE: Unlike nitro engines, do not allow the gasoline engine to idle for several
tanks. Allowing the engine to idle prevents the engine from reaching operating
temperature.
Fuel Tank #1:
1. Drive the vehicle in a fi gure 8 for the fi rst half tank of fuel. Keep the throttle
position between 1/4 – 3/4 throttle. Do not exceed ¾ throttle.
2. During the second half of the tank, move the throttle position between ¼ and full
throttle. Do not hold full throttle for more than one second.
Engine temperature: Do not exceed
1 9 5 º F ( 9 0ºC )
Fuel Tank #2: Move the throttle position between ¼ and full throttle. Do not hold full
throttle for more than one second.
Engine temperature: Do not exceed
2 1 0 º F ( 9 9ºC )
Fuel Tank #3:
1. For the fi rst half tank of fuel, move the throttle position between ¼ and full
throttle. Do not hold full throttle for more than one second.
2. Lean the high speed needle 2-3 hours when the fuel level reaches ½ tank.
3. For the second half of the tank, move the throttle position between ¼ and full
throttle. Do not hold full throttle for more than two seconds.
Engine temperature: Do not exceed 2 2 5 º F ( 1 0 7 ºC )
Fuel Tank #4:
1. For the fi rst half tank of fuel, move the throttle position between ¼ and full
throttle. Do not hold full throttle for more than two seconds.
2. Lean the high speed needle 1-2 hours when the fuel level reaches ½ tank.
3. For the second half of the tank, move the throttle position between ¼ and full
throttle. Do not hold full throttle for more than three seconds.
Engine temperature: Do not exceed 2 3 0 º F ( 1 1 0 ºC )
Fuel Tanks #5-8:
At the end of Tank #4, the vehicle is ready to run on dirt surfaces. Maintain the
same carburetor settings that were used during Tank #4 through Tank #8. After
8 tanks of fuel, you can tune the engine for peak performance.
Engine temperature: Never exceed 2 5 0 º F ( 1 2 1 ºC )
Notice: Engine temperatures are measure on the side of the
engine block and not at the top of the head like a traditional
nitro engine.