Methods and fuel systems to reduce evaporative emissions of a volatile
fuel. A fuel tank contains fuel, a carburetor mixes air with the fuel
from the fuel tank, and a plurality of fluid paths route fuel amongst
and/or between the fuel tank and the carburetor. A valve actuation device
stops flow of fuel in one or more of the plurality of fluid paths and the
carburetor is adapted to be drained of fuel during engine shutdown to
reduce or prevent evaporative emissions from the fuel system. The
carburetor is preferably designed so as to minimize a volume of fuel
contained therein.