Required Equipment; Safety Precautions; Engine Break-In And Adjustments; Break-In Procedure - Team Losi Aftershock Operation Manual

Introduction
Thank you for choosing the Losi ® Limited Edition Aftershock
that features a sophisticated computer-based radio system and does require some mechanical experience and direct adult
supervision. This guide contains the basic instructions and drawings for operating and maintaining your new Limited
Edition Aftershock. Please take the time to read through it completely before running the model. Your hobby dealer
cannot, under any circumstances, accept a model for return or exchange that has been run.
Customer Support Contact
productsupport@horizonhobby.com

Safety Precautions

THIS IS NOT A TOY! The Limited Edition Aftershock is a sophisticated, high-performance radio controlled model, which
needs to be operated with caution and common sense. Failure to operate this model in a safe and responsible manner
could result in personal and/or property damage. It is your responsibility to see that the instructions are followed and
precautions adhered to.
The Limited Edition Aftershock is not intended for use by children without direct adult supervision. Losi and Horizon Hobby
shall not be liable for any loss or damages, whether direct, indirect, special, incidental or consequential arising from the
use, misuse or abuse of this product or any product required to operate it.
* This is still a model; don't expect it to do unrealistic stunts.
Warnings
• Fuel is dangerous if handled carelessly. Follow all directions and precautions on the fuel container.
• Keep fuel and all chemicals out of the reach of children.
• Always keep the fuel container closed and never use around an open flame or while smoking.
• The exhaust emits poisonous carbon monoxide fumes. Always run the model in a well ventilated area and never
attempt to run it indoors.
• The top of the engine and the exhaust pipe are extremely hot during and for a time after use. Use caution not to touch
these parts, especially when refueling.
• The engine can be loud, especially when run in a confined area. If you find the noise objectionable, use ear protection.
• This model is controlled by a radio signal that is subject to interference from sources outside your control. Interference
can cause temporary loss of control so it is advisable to always keep a safety margin in all directions to avoid collisions.
• Always operate your model in an open area away from people and cars. The potential speed of this model can cause
injury or damage.
™ Monster Truck. This is a highly developed off-road model
Horizon Hobby, Inc.
4105 Fieldstone Road
Champaign, IL 61822
1-877-504-0233
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Required Equipment

You will need the following items to operate your new Limited Edition Aftershock.
• 4 AA alkaline batteries for the transmitter
• Losi ® Nitrotane ™ 20% Sport Fuel. (LOSF0020 or LOSF0120) This is the only fuel that supports
the engine warranty.
• Fuel bottle (LOSB5201)
• Charger for 6V receiver pack
• Optional: Losi Nitro Starter Kit - Includes fuel bottle, ingiter, 3-way charger
and tuning screwdriver (LOSA99072)
Tools You Will Find Handy
In addition to the tools included with the Limited Edition Aftershock, you will find the following both useful and in some
cases necessary.
• LOSB4603 4-Way Wrench
• LOSA99167 Tuning Screwdriver
• Small flat blade and Phillips screwdrivers
• Needle-nose pliers
• Quality .050", 1/16", 5/64", 3/32", 1.5mm and 2.5mm hex (Allen) drivers

Engine Break-In and Adjustments

Breaking in your new engine is critical for proper performance. Failure to follow the break-in procedures can cause damage
and shortened engine life. During break-in and when running, always use Losi Nitrotane 20% Sport Fuel. Although the
carburetor is preadjusted at the factory, you must be familiar with the following adjustments and break-in procedure.
If you change fuel or run in dramatically different environments (hot/cold, high/low elevation, etc.), you will probably
have to adjust at least the high-speed needle to prevent overheating and maintain proper performance. Never, under any
circumstances, allow the engine to rev freely with the wheels off the ground.

Break-In Procedure

1.) The first three tanks of fuel should be run with the high- and low-speed needles noticeably "rich" (see explanation
below). There should be a slight sluggishness and thick smoke when accelerating with the smoke decreasing as the
model gains speed. At speed, there should still be a noticeable trail of smoke from the exhaust pipe. Run the Limited
Edition Aftershock on a flat surface in an oval pattern. Ease into the throttle as you accelerate on the straight sections,
easing off as you approach turns—letting the model roll through the turn before easing back on the throttle. This will
also allow you to get a feel for the steering response and handling characteristics of the model.
2.) You can also break in the engine by placing the model against a wall or fixed object and allowing the engine to idle
through two full tanks of fuel. You may have to lean the low-speed mixture (slightly) as noted below.
Understanding "Rich" and "Lean" Fuel Mixture
Adjusting the carburetor is one of the most critical facets of running a nitro-powered RC vehicle. The fuel mixture is
referred to as being "rich" when there is too much fuel and "lean" when there is not enough fuel for the amount of air
entering the engine. The amount of fuel entering the engine is adjusted with high and low-speed threaded needle valves.
The low-speed needle is located in the front of the moving slide. The high-speed needle sticks straight up at the back
of the carburetor. Both feature a slotted head that is used as a reference and receptacle for a flat blade screwdriver for
adjustments. The mixture is made richer by turning the needle counterclockwise and leaner by turning clockwise. An overly
rich mixture will yield sluggish acceleration and performance with thick smoke from the exhaust. A lean mixture can cause
the engine to hesitate before accelerating or, in some cases, to lose power momentarily after the initial acceleration.
A lean mixture also makes the engine run hotter than desired and does not provide enough lubrication for the internal
engine components, causing premature wear and damage. It is always advisable to run the engine slightly rich and never
lean to avoid overheating and possible damage.
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