How To - Prime the Engine
On all Traxxas engines, the EZ-Start® should turn the engine over at a sufficient enough rate to draw the fuel into the carburetor within a reasonable amount of time. Look at the fuel line and watch the fuel make its way up to the carburetor.
To help speed up the fuel to the carburetor you can prime the engine by placing your finger over the outlet of the exhaust pipe for just a second or two. You can see the fuel work its way to the carburetor rapidly. Caution: Priming the engine for too long will flood the engine causing it to hydro-lock. Thankfully the EZ-Start 2 system was designed with thermal protection and overload cutoff circuitry. If you have flooded the engine, read this Clearing a flooded engine article.