A fuel-tank-equipped working machine is provided, which is capable of securing a fuel tank to be large in a state where the fuel-tank-equipped working machine is secured to be compact. A generator 10 as a working machine includes a fuel tank 25 supported at an outer case 12. The working machine 10 includes a tank opening 35 that is formed at the outer case 12, a mounting concave portion 38 that is formed on the fuel tank 25, and a cushion portion 37 that is capable of being housed in the mounting concave portion 38. The tank opening 35 is formed so as to be able to expose an upper half part 25a of the fuel tank 25 to an outside 14 of the outer case 12. Further, the cushion portion 37 has a fitting groove 63 capable of being fitted to an opening rim 36 of the tank opening 35.

The power generator comprises an engine, an alternator to be driven by the engine, and shrouds that cover at least a part of the engine, and each of the shrouds is formed of a shroud main body member and a sound absorbing member.

A self-contained, stand-alone power generator system comprising: an electric motor for applying torque to a shaft of a rotating mass, wherein the electric motor is powered by a dedicated power source; a battery for supplying additional power to the electric motor upon start up; at least one of a torque converter and a starter motor, for overcoming resting inertia of the rotating mass; a generator head coupled to the rotating mass, wherein the power generator is constructed such that when the generator head reaches operational speed, the generator head provides the additional power to the electric motor and recharges the battery.

Devices, systems, and methods to air cool a portable generator are disclosed. The devices include various air ducts to direct airflow over heated components within a cabinet of the portable generator to cool the components by convection. A damping fan draws ambient temperature air into the cabinet and directs the air into channels of an outflow duct.

In general, techniques of this disclosure are directed to a modular generator set system. A generator set system may comprise a primary module, which may include an engine, a generator coupled to the engine, a primary frame configured to support the engine and the generator, and a first guiding element. The generator set system may also include a secondary module, a secondary frame, and a second guiding element that is reciprocal to the first guiding element such that, during installation of the secondary module, the second guiding element is configured to interface with the first guiding element to align the secondary module for purposes of automatically electrically or fluidically coupling the primary module to the secondary module upon assembling the primary frame and the secondary frame.

A thermal choke, includes (1) a body, comprising a heat conductive material, (2) an electric heater, on or in the body, (3) a temperature sensor, on or in the body, and (4) a fin, in a channel surrounded by the body. The thermal choke is configured to fit between a throttle assembly and a cylinder of a spark ignition engine.

A work machine that can discharge water collected inside a casing to the outside, reduce leakage of noise, and reduce entry of foreign matter from outside. The work machine includes a bottom portion cover forming a portion of a casing, and the bottom portion cover includes: at least two ribs and a bead (strengthening structure portions) that are formed substantially perpendicular to a bottom surface of the bottom portion cover; and a drain hole located in a connecting portion connecting the bottom surface of the bottom portion cover and a water-discharging rib among the at least two ribs. An upper portion of the water-discharging rib is located over the drain hole.

A thermal choke, includes (1) a body, comprising a heat conductive material, (2) an electric heater, on or in the body, (3) a temperature sensor, on or in the body, and (4) a fin, in a channel surrounded by the body. The thermal choke is configured to fit between a throttle assembly and a cylinder of a spark ignition engine.

A system provides a fuel source adapter for a combustion engine. The fuel source adapter is located at least partially between an air intake and the combustion chamber of the engine, such as at the carburetor or throttle body. The combustion chamber receives airflow from the air intake manifold that is delivered through an airflow passage. The fuel source adapter has a spacer plate portion and a velocity stack. The velocity stack extends from the spacer plate to the air intake manifold. An axial airflow passage extends through the velocity stack and the spacer plate. The axial airflow passage is aligned with the airflow passage of the carburetor or throttle body. The spacer plate has a transverse fuel inlet. The transverse fuel inlet extends to the axial airflow passage and enables a fluid connection to the axial airflow passage.

A high density mobile power unit may include an elongated unibody frame having a frame cavity, a front end, a rear end, an elongated roof panel, a front panel, a rear panel, an elongated floor assembly having an upper side and a lower side, an elongated first side panel, and an elongated second side panel. An enclosure may be formed by the elongated roof panel, the front panel, the rear panel, the elongated floor assembly, the elongated first side panel, and the elongated second side panel. An under carriage structural lattice arrangement may be coupled to the lower side of the floor assembly from the midpoint and extending towards the front end. The under carriage structural lattice arrangement may include a first elongated lattice and a second elongated lattice, and the first elongated lattice and second elongated lattice may be substantially parallel to each other.