Abstract: A gasoline engine choking arrangement which serves as a modification to automatic chokes found in existing 9 and 11 cubic inch vertical shaft gasoline engines, i.e. an arrangement which achieves effective gasoline engine starting under both hot and cold conditions. A sleeve is provided to immobilize choke butterfly plate movement and, additionally, a primer assembly communicates with the fuel tank for selective gasoline flow. The aforesaid components, which may be merchandised in kit form, overcome flooding and consequent engine non-function which results, for example, from temperature variation and/or a stuck choke butterfly plate.