Components of a nitro gas rc car fuel system.

A nitro rc car fuel system can be hard to master. Here’s how it works as well as some handling tips.

Fuel Tank System

RC gas car fuel system

The fuel delivery system of a nitro rc car:
1. Fuel tank
2. External fuel filter
3. Primer
4. Fuel line
5. Air pressure line

Nitro RC car Fuel Tank
Fuel is stored in a fuel tank. Some fuel tanks have an internal fuel filter while others do not. An external fuel filter should be used with fuel tanks that do not have an internal fuel filter.

rc car 125cc fuel tanknitro rc car fuel tanknitrol rc car purple aluminum fuel tankrc car fuel tank blue aluminum

rc fuel filter
External Fuel Filter
To prevent debris from entering the engine, a fuel filter is placed between the fuel tank
and the carburetor. If the tank has an internal fuel filter, there is no need to use an external fuel filter.

Primer
To start an engine, it must have fuel in the carburetor. The primer helps push fuel into the carburetor. This is done buy pushing the primer up and down several times. You can actually see the fuel inside the transparent fuel line move from the fuel tank to the carburetor.

Fuel Line
This is a rubber tubing allowing fuel from the fuel tank to reach the carburetor. Air Pressure Line Rubber tubing coming from the tuned pipe going to the top of the fuel tank. Exhaust air from the tuned pipe helps to pressurize the fuel tank, helping fuel move from the fuel tank to the carburetor.

nitro rc car fuel lines assortedNitro rc car fuel line set

Tips on handling a nitro rc car fuel system:

Tip 1:

To prevent confusion, try using different color tubing for the air pressure line and the fuel line. For example, use orange for the air pressure line and blue for the fuel line. This will help prevent mistakes in connecting the line. For example, if you mix up the connection, your car will not start.

Tip 2:

I personally prefer a fuel tank with a primer because I can easily force fuel into the carburetor before starting the engine. Some fuel tanks do not have a primer, and I find it takes a few pulls on the pull-start to get fuel to even reach the carburetor.

Hope I have helped you with this info on an rc car fuel system.

Cheers to your rc hobby!

-Leon

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