Abstract: A portable lighting tower includes a frame, a mast coupled to the frame including a light, a plurality of legs coupled to the frame, each leg including an actuator operable to deploy and retract the respective leg, a controller operatively coupled to the actuators and configured to control operation of the actuators, and a tilt sensor operably coupled to the controller and configured to generate a tilt signal indicative of a tilt of the portable lighting tower relative to horizontal. The controller is configured to determine a grade of the portable lighting tower based on the tilt signal, determine an extended length of each leg based on the determined grade of the portable lighting tower, and, after determining the extended length of each leg, operate each of the actuators to deploy the respective leg from a storage configuration to the determined extended length.

Abstract: An operating system for a standby generator includes a control unit, a switch, an inverter, a terminal, a current sensor, a starter circuit, a power control circuit, and an ignition kill circuit. The control unit is powered by a rechargeable twelve volt DC battery. The switch is selectively operable by the control unit to connect one of a first input or a second input to an output. The second input receives the supply of electrical power from an internal combustion engine. The inverter is positioned between the DC battery and the first input, and supplies electrical power to the electrical device when a movable contact of the switch connects the output to the first input. The power control circuit is connected to the control unit and is operable to adjust the movable contact of the switch to selectively connect the output to either the first input or the second input.

Abstract: Outdoor power equipment includes a frame, a power head, a transmission, a pair of rear drive wheels, and a wheel height adjustment mechanism. The power head is coupled to the frame. The transmission is coupled to the frame and operatively coupled to the power head. The transmission includes a drive rotatable member configured to rotate about a first axis. The pair of rear drive wheels are coupled at respective ends of a rear drive axle so that the rear drive axle, and the pair of rear drive wheels coupled thereto, rotate about a second axis different than the first axis. The wheel height adjustment mechanism includes a first bell crank pivotally coupled to the frame about the first axis. A first end of the first bell crank is coupled to the rear drive axle.

Abstract: An engine including an engine block having a cylinder defining a front of the engine, a blower housing coupled to the engine block and defining a hot half positioned adjacent the front of the engine and a cool half opposite the hot half, and an electric starter system positioned within the blower housing. The electric starting system includes a starter mount assembly coupled to the blower housing, an electric starter motor retained by the starter mount assembly and positioned in the cool half, and a battery mounted to the blower housing and positioned in the cool half. The battery is electrically coupled to the electric starter motor.

Abstract: A ZTR mower includes a pair of rear drive wheels, a mowing deck including multiple cutting blades, an electric storage battery, a pair of electric wheel motors each configured to rotate one of the rear drive wheels, multiple electric blade motors each configured to rotate one of the multiple cutting blades, and a master controller in communication with each of the pair of wheel motors and the multiple blade motors. The master controller is configured to control a rotational speed of each of the pair of wheel motors and the multiple blade motors. The master controller is configured to send voltage pulses to the multiple blade motors.

Abstract: One embodiment of the invention relates to an internal combustion engine including an engine block having a first cylinder and a second cylinder, a crankshaft configured to rotate about a crankshaft axis, a flywheel coupled to the crankshaft, a throttle body, an air filter assembly, a first electric fan coupled to a first duct, and a second electric fan coupled to a second duct. The first duct is configured to direct cooling air directly over the first cylinder. The second duct is configured to direct cooling air directly over the second cylinder. The first cylinder is at least partially within the first duct. The second cylinder is at least partially within the second duct.

Abstract: An electric powerhead includes a housing including a mounting assembly, wherein the mounting assembly includes a mounting plate and a mounting insert. The mounting plate includes a shaft opening and a plurality of first openings arranged in a standard vertical shaft engine mounting pattern and the mounting insert includes a plurality of second openings aligned with the plurality of first openings. The electric powerhead further includes an electric motor positioned within the housing, wherein the electric motor includes an output shaft that extends through the shaft opening of the mounting assembly and wherein the output shaft is configured to rotate about an axis of rotation.

Abstract: A battery pack is configured to be coupled to outdoor power equipment and includes a battery positioned in a housing, the housing comprising an interface surface, a plurality of high current pins electrically connected to the battery and accessible through the interface surface, a plurality of low current pins electrically connected to the battery and accessible through the interface surface, and a battery controller electrically coupled to the battery, the plurality of low current pins, and the plurality of high current pins.

Abstract: A mower deck insert includes a first cutting chamber, a second cutting chamber, and a discharge passage extending adjacent to the first cutting chamber and the second cutting chamber. The first cutting chamber includes a first axial scroll extending about a first vertical axis. The first axial scroll includes a first upper surface having a first start region and a first end region. The second cutting chamber includes a second axial scroll extending about a second vertical axis. The second axial scroll includes a second upper surface having a second start region and a second end region. The first start region is vertically lower than the first end region, and the second start region is vertically lower than the second end region.

Abstract: A zero turn radius lawnmower, such as a stand-on lawnmower, including a main frame having a first end portion and a second end portion, a pair of drive wheels operably coupled to the second end portion of the main frame and configured to be driven independently in both forward and reverse directions, and a front axle assembly pivotally coupled to the first end portion of the main frame about a single axis. The zero turn radius lawnmower also includes a pair of caster wheels coupled to respective ends of the front axle assembly such that the pair of caster wheels are able to move relative to the main frame, as well as a mower deck coupled to the main frame by at least one first linkage and coupled to the front axle assembly by at least one second linkage.

Abstract: An engine assembly includes an internal combustion engine and a carbon monoxide (CO) sensor unit. The CO sensor unit includes a CO sensor controller including a CO sensing circuit configured to detect a level of CO and a shutdown circuit. The shutdown circuit is configured to receive a detected level of CO and calculate a trailing window average of the detected level of CO. The trailing window average includes an average of the detected level of CO over a predetermined sampling window. The shutdown circuit is further configured to determine whether to initiate a shutdown of the internal combustion engine based on at least the calculated trailing window average and a predetermined trailing window average threshold and initiate the shutdown of the internal combustion engine based on determining that the trailing window average exceeds the predetermined trailing window average threshold.

Abstract: A battery system includes a battery assembly and an equipment interface. The battery assembly includes a battery pack, a battery housing enclosing the battery pack, a communication gateway, and a first electrical connector. The battery pack includes rechargeable battery cells. The communication gateway is configured to communicate using a first communication protocol and a second communication protocol different from the first communication protocol. The first electrical connector includes a plurality of first terminals. The equipment interface is configured to be coupled to a piece of equipment, and includes a second electrical connector including a plurality of second terminals. The second electrical connector is configured to mate with the first electrical connector to electrically coupled the plurality of first terminals with the plurality of second terminals to electrically couple the battery assembly to the equipment interface.

Abstract: A CO sensor module includes a housing, a CO sensor, and a module battery. The housing has a first portion that is configured to be removably inserted into a compartment of a generator and a second portion that is configured to be positioned outside of the compartment. The CO sensor is positioned within the first portion of the housing and is configured to detect concentrations of CO. The module battery is positioned within the housing and is configured to power the CO sensor module. The second portion of the housing includes a mounting ring that is configured to abut a control panel of the generator in an installed position.

Abstract: An internal combustion engine includes an engine block including a cylinder a piston positioned within the cylinder and configured to reciprocate in the cylinder, an electronic throttle control system comprising a motor and a throttle plate, a fuel system for supplying a controlled amount of fuel to the cylinder including a fuel injector, and an engine control unit coupled to the fuel system and the electronic throttle control system. The engine control unit is configured to determine engine speed data comprising a current engine speed, a previous engine speed, and a desired engine speed and control a fuel injection duration based on the engine speed data.

Abstract: A battery pack for use in providing starting power for a starter motor of an internal combustion engine and to supply power to one or more auxiliary loads. The battery pack includes an outer housing that encloses a plurality of battery cells. The battery pack further includes a control module. The control module includes a processing circuit configured to control one or more functions associated with the internal combustion engine and an interface circuit configured to interface with the internal combustion engine.

Abstract: A starter battery system for an air cooled engine rated at less than 50 horsepower. The system includes four lithium iron phosphate cells and a charging circuit configured to be powered by rotation of an air cooled engine. A voltage developed by the charging circuit is applied to the four lithium iron phosphate cells without battery management circuitry provided between the charging circuitry and the four lithium iron phosphate cells. An engine which includes at least one piston, a rotatable crankshaft coupled to the at least one piston, a starter motor configured to selectively initiate rotation of the crankshaft, a lithium-ion battery in electrical communication with the starter motor, the lithium-ion battery having at least one cell, and a charging system configured to be powered by motion of at least one component of the engine. The charging system is configured to continuously apply a voltage potential to the at least one cell while the engine is in a running condition.

Abstract: An outdoor power equipment includes multiple motors and a controller module. The motors include a first motor and a second motor. The first motor is structured to operate a first component of the outdoor power equipment and the second motor is structured to operate a second component of the outdoor power equipment. The controller module includes multiple motor controllers structured to communicate via a network communication bus with each other and operate the first motor and the second motor to operate the first component and the second component based on the communication via the network communication bus.

Abstract: An air-cooled internal combustion engine including a crankshaft rotating about a crankshaft axis, a first cylinder having a first cylinder head, a second cylinder having a second cylinder head, and a blower assembly. The blower assembly includes a blower housing, a first fan, and a second fan. The first fan is positioned proximate the first cylinder and the second fan is positioned proximate the second cylinder. The first fan and the second fan are each received within the blower housing.

Abstract: A zero turn radius mower including a pair of rear drive wheels, a mowing deck including multiple cutting blades, an electric storage battery, a pair of electric wheel motors each operable to rotate one of the rear drive wheels, multiple electric blade motors each operable to rotate one of the multiple cutting blades, and a master controller in communication with each of the pair of wheel motors and the multiple blade motors. The master controller is operable to control a rotational speed of each of the pair of wheel motors and the multiple blade motors. The master controller is operable to stop rotation of the cutting blades when the wheel motors are operating below a threshold speed.

Abstract: A portable lighting tower includes a frame, an adjustable mast, multiple legs, a controller, and a battery pack. The adjustable mast is coupled to the frame and includes a light. The multiple legs each include an actuator operable to deploy and retract the respective leg. The controller is operatively coupled to the light and the actuators and configured to control operation of the light and the actuators. The battery pack is electrically coupled to the controller, the light, and the actuators. The light is dimmable between a maximum setting and a minimum setting, and the controller operates each of the linear actuators to deploy or retract the respective leg response to a user input.