15
Air Filter
Do not run engine without an air filter!
The air filter protects the engine from the intake of dust and
other contaminants. A properly maintained air filter is essential
to the life and performance of the engine. Use proper air filter
oil with your air filter.
Exhaust System
We recommending using only the XRAY-supplied 2-piece
exhaust system for best performance.
Fuel
For break-in and general running, use high-quality, market-
available model car fuel containing 20% lubricant and
15~30% nitromethane by volume ratio. Although you can
obtain more power by increasing the nitromethane content,
it will shorten engine life.
Glowplug
The type and quality of glowplug used for your engine has
a substantial impact on overall performance and reliability.
We strongly recommend glowplugs by XRAY. Glowplugs are
consumables and the life of plug depends on several factors
and manners of use.
STARTING & SUPPORT EQUIPMENT
• Read and follow all directions and warnings on the fuel container.
• Read and follow the safety precautions in the NT18 Engine Instruction & Safety Manual.
• Keep the fuel container tightly sealed at all times. Nitro fuel is very volatile, evaporates quickly, and also absorbs moisture from the air very rapidly.
• Do not store unused fuel in the fuel bottle. Immediately return fresh unused fuel back into the fuel container. Do not mix old and new fuel, and never mix different brands of
fuel together.
• Store the fuel in a cool, dry location away from any source of heat, ignition, or combustion.
Starter Box
You must start the engine by first spinning the clutch flywheel.
We strongly recommend using the #104300 HUDY Micro
Start-Box, which is specifically designed for starting the NT18
engine.
Glowplug Starter
A glowplug starter is required to ignite the glowplug for
starting. We recommending using a high-quality, battery-
operated glowplug starter from a reputable manufacturer.
Glowplug Wrench
A glowplug wrench is required for removing/installing the
engine glowplug. We recommend using a high-quality
glowplug wrench such as the #107581 HUDY Wrench-
Glowplug.
Screwdriver
A small flat-blade screwdriver is required for adjusting the
carburetor. We recommend using high-quality tools such as
those offered by HUDY.
HANDLING NITRO FUEL
Use a fuel bottle to put fuel into fuel tank; DO NOT attempt to pour fuel directly from the fuel container into the fuel tank.
To fill the fuel bottle squeeze the bottle to remove the air, insert the tip into the fuel container, and then release your grip on the fuel bottle. Fuel will be drawn into the fuel bottle
as the bottle expands.
To fill the fuel tank pull up on the fuel tank cap, insert the tip of the fuel bottle into the tank, and then gently squeeze the fuel bottle to dispense the fuel. Be very careful not to
squeeze to hard or fast, or overfill the fuel tank.
FILLING THE FUEL TANK
Do not run engine without an air filter!
The air filter protects the engine from the intake of dust and other contaminants. A properly maintained air filter is essential to the life and performance of the engine. Use
proper air filter oil with your air filter. The oil softens the foam element and traps dirt more easily.
We strongly recommend that you clean and re-oil the air filter after every 1 hour of runtime (even if the filter looks clean) to maintain proper engine performance and avoid en-
gine damage. To clean the air filter parts (including the foam filter element), wash the parts in hot soapy water, and rinse thoroughly with clean water. Dry the parts with a clean
towel or compressed air (use safety eyewear). Oil the foam element with proper air filter oil.
Air Filter Cleaning Instructions
1. Pull the air filter body off of the carburetor.
2. Remove the foam element from the air filter body.
3. Clean the air filter parts thoroughly by washing them in hot soapy water (liquid dishwashing detergent works well). Repeat twice.
4. Thoroughly dry the air filter parts with a clean towel or compressed air. Wear safety glasses if using compressed air.
AIR FILTER
1. Check that your radio channel is not in use by anyone else; YOU MUST NOT turn on your transmitter if the channel is in use.
2. Turn on the truck, and then turn on the transmitter.
3. Check radio operation.
4. Place the truck on the starterbox, and align the truck so the engine flywheel is directly over the starterbox wheel.
GETTING READY TO START THE ENGINE
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