Gum content

Gum content is one type of gasoline performance.
When gasoline evaporates completely, it leaves a yellow or brown gum or resin substance.
If a type of gasoline with a high gum content is used, it may cause the sticking of the throttle valve, clogging of the carburetor nozzle, or sticking of the intake valve.
Because gasoline will volatilize before entering the intake valve if the temperature of the carburetor tube is high, gum content will remain on the walls of the intake pipes. Although this will not result in serious damage, when the temperature is low, this residue will adhere to the suction valve, after which it will carbonize and causes damage.
For this reason, it is best to use a gasoline with a low gum content.

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