Abstract: For use with a liquid cooled engine with a freeze plug opening, a heater assembly with a resistance type heating element supported in the interior of a generally cup-shaped housing with an open end positioned over the freeze plug opening.

Abstract: A fluid flowmeter having a plurality of separate outlet port means therein for exhausting fluid from the flowmeter into a common outlet chamber in the cover of the pump housing in which the flowmeter is enclosed and is pluggably detachably received.

Abstract: A throttle body assembly wherein a pair of throttle blades are counter-rotatably mounted in the induction passage and define at their juxtaposition venturi sections whose size is variable in accordance with the degree of rotation of the throttle blades. The blades are peripherally sealed with respect to the walls of the induction passage by means of wiper type seals affixed to each blade as well as by caged roller type seals.

Abstract: An arrangement for mounting a fuel metering control pump on an internal combustion engine comprises the air intake system via which air is drawn into the engine, said system including a generally annular support element on which the control pump mounts. Means are provided for mounting the annular support element on the intake manifold of the engine with induction air passing through a central aperture defined by the inner periphery of the annular support element. The control pump is disposed adjacent this aperture and meters fuel via a suitable fuel distribution system into the induction air stream to form the combustible mixture for the engine. The control pump includes an inlet port which passes through an opening in the wall of the annular support element to provide for connection of a fuel supply line thereto exteriorly of the air intake system. A similar arrangement is provided for a return line to the fuel tank.