In at least some implementations, a throttle body assembly includes a body that has multiple throttle bores, multiple throttle valve heads received one in each of the throttle bores, at least one throttle valve shaft to which the throttle valve heads are coupled, and at least one of a fuel metering valve and a vapor separator carried by the body.

In at least some implementations, a throttle body assembly includes a body that has multiple throttle bores, multiple throttle valve heads received one in each of the throttle bores, at least one throttle valve shaft to which the throttle valve heads are coupled, and at least one of a fuel metering valve and a vapor separator carried by the body.

In at least some implementations, a throttle body assembly includes a body that has multiple throttle bores, multiple throttle valve heads received one in each of the throttle bores, at least one throttle valve shaft to which the throttle valve heads are coupled, and at least one of a fuel metering valve and a vapor separator carried by the body.

In at least some implementations, a throttle body assembly includes a body that has multiple throttle bores, multiple throttle valve heads received one in each of the throttle bores, at least one throttle valve shaft to which the throttle valve heads are coupled, and at least one of a fuel metering valve and a vapor separator carried by the body.

An apparatus for delivering a fuel-air mixture to an engine is provided. The apparatus includes: a carburetor having one or more passages and one or more chambers, wherein at least some of the passages and chambers are in communication with one another; and a fluid pump communicated with the carburetor and pumping fluid into or out of the carburetor to influence an fuel-to-air ratio of a fuel and air mixture delivered from the carburetor.

An apparatus for delivering a fuel-air mixture to an engine is provided. The apparatus includes: a carburetor having one or more passages and one or more chambers, wherein at least some of the passages and chambers are in communication with one another; and a fluid pump communicated with the carburetor and pumping fluid into or out of the carburetor to influence an fuel-to-air ratio of a fuel and air mixture delivered from the carburetor.

A carburetor draining system for safe and convenient draining. A vessel posterior end of a vessel is disposed against a carburetor body. A vessel base is disposed against a vessel anterior end. A base aperture is disposed on the vessel base. A stem posterior portion of a drain stem is disposed inside the vessel chamber and a stem anterior portion protrudes from the base aperture. A drain port disposed through the stem posterior portion intersects a drain channel disposed inside the stem anterior portion. A locking mechanism secures the vessel to the carburetor body. A valve body of a valve is removeably disposed inside the drain channel. A first seal on the valve body is pressed against an interior surface of the drain channel. A second seal is disposed on a valve stem. A valve handle moves the valve into a closed position or an open position for draining.

A carburetor draining system for safe and convenient draining. A vessel posterior end of a vessel is disposed against a carburetor body. A vessel base is disposed against a vessel anterior end. A base aperture is disposed on the vessel base. A stem posterior portion of a drain stem is disposed inside the vessel chamber and a stem anterior portion protrudes from the base aperture. A drain port disposed through the stem posterior portion intersects a drain channel disposed inside the stem anterior portion. A locking mechanism secures the vessel to the carburetor body. A valve body of a valve is removeably disposed inside the drain channel. A first seal on the valve body is pressed against an interior surface of the drain channel. A second seal is disposed on a valve stem. A valve handle moves the valve into a closed position or an open position for draining.