Abstract: A marine engine has first and second banks of cylinders; a supercharger configured to supply charge air for combustion in the first and second banks of cylinders; first and second charge air coolers configured to cool the charge air, wherein the first and second charge air coolers each have an upstream inlet that receives the charge air from the supercharger, a downstream outlet that discharges the charge air for combustion in the marine engine, and a bypass port for conveying a portion of the charge air, the bypass port being located downstream of the inlet and upstream of the outlet; a recirculation passage coupled to the first charge air cooler, the recirculation passage conveying the portion of the charge air from the bypass port of the first charge air cooler back to the supercharger; and a mounting plate coupled to the second charge air cooler, the mounting plate preventing flow of the portion of charge air through the bypass port of the second charge air cooler.

Abstract: A trim control system for controlling a relative position of a trimmable marine device with respect to a marine vessel hull includes a trim actuator coupled to the trimmable marine device about a horizontal trim axis. The trim control system further includes a trim control module executable on a processor and configured to identify a target trim position for the trimmable marine device, determine a desired trim rate of change to rotate the trimmable marine device about the horizontal axis from a current trim position toward a target trim position, and operate the trim actuator to rotate the trimmable marine device at the desired trim rate of change toward the target trim position.

Abstract: Transmission systems and methods are for a marine propulsion device having an internal combustion engine that drives a propulsor. An input shaft is driven into rotation at a non-zero first rotational speed by the internal combustion engine. An output shaft drives the propulsor into rotation at a non-zero second rotational speed. A planetary gearset transfers power from the input shaft to the output shaft. A band brake is on the planetary gearset. Actuation of the band brake effects a gear change in the planetary gearset. A band brake actuator actuates the band brake to effect the gear change. A controller controls the band brake actuator. Based upon one or more operational characteristics of the marine propulsion device the controller is programmed to control the band brake actuator so that the second rotational speed is less than the first rotational speed.

Abstract: Transmission systems and methods are for a marine propulsion device having an internal combustion engine that drives a propulsor. An input shaft is driven into rotation at a non-zero first rotational speed by the internal combustion engine. An output shaft drives the propulsor into rotation at a non-zero second rotational speed. A planetary gearset transfers power from the input shaft to the output shaft. A band brake is on the planetary gearset. Actuation of the band brake effects a gear change in the planetary gearset. A band brake actuator actuates the band brake to effect the gear change. A controller controls the band brake actuator. Based upon one or more operational characteristics of the marine propulsion device the controller is programmed to control the band brake actuator so that the second rotational speed is less than the first rotational speed.

Abstract: Transmission systems and methods are for a marine propulsion device having an internal combustion engine that drives a propulsor. An input shaft is driven into rotation at a non-zero first rotational speed by the internal combustion engine. An output shaft drives the propulsor into rotation at a non-zero second rotational speed. A planetary gearset transfers power from the input shaft to the output shaft. A band brake is on the planetary gearset. Actuation of the band brake effects a gear change in the planetary gearset. A band brake actuator actuates the band brake to effect the gear change. A controller controls the band brake actuator. Based upon one or more operational characteristics of the marine propulsion device the controller is programmed to control the band brake actuator so that the second rotational speed is less than the first rotational speed.

Abstract: A lubrication system in a marine drive has a lubrication circuit that conveys lubrication to componentry of the marine drive and a lubrication service port connected to the lubrication circuit. The lubrication system further includes a pump disposed in the marine drive, wherein the pump pumps lubrication through the lubrication circuit. A hydraulic valve is connected to the lubrication circuit, wherein the hydraulic valve has a normal operating position wherein lubrication in the lubrication circuit is pumped by the pump to the componentry, and has a servicing position wherein lubrication in the lubrication circuit is pumped by the pump to the lubrication service port.

Abstract: A method for controlling propulsion of two or more marine drives in a marine vessel includes detecting a fault condition relating to a first marine drive, and determining, at a first control module associated with the first marine drive, a power limit restriction for the first marine drive based on the fault condition. The method further includes communicating the power limit restriction with the first control module on a CAN bus of the marine vessel, and receiving the power limit restriction at a second control module associated with a second marine drive. The power output of the second marine drive is then reduced based on the power limit restriction for the first marine drive.

Abstract: A marine drive system includes an engine, a fuel system that provides at least two different fuels to the engine, and a fuel selection means for selecting a fuel type. A control unit accesses a set of fuel-specific operating parameters based on the selected fuel type and controls the engine based on the set of fuel-specific operating parameters.

Abstract: A method of monitoring and controlling a transmission in a marine propulsion device comprises the steps of receiving a rotational input speed of an input shaft to the transmission, receiving a rotational output speed of an output shaft from the transmission, receiving a shift actuator position value, and receiving an engine torque value. The method further comprises calculating a speed differential based on the input speed and the output speed, and generating a slip profile based on a range of speed differentials, engine torque values, and shift actuator position values.

Abstract: An exhaust system for an internal combustion engine used in a marine propulsion system is provided with a water injection system by which water can be injected into the exhaust system. An engine control unit, which comprises a micro-processor, is used to select the rate of water injection into the exhaust system as a function of several predefined parameters. For example, engine speed and throttle position can be used by the micro-processor in the engine control unit to select a predefined rate of water flow into the exhaust system by selecting a predefined valve position, for an electronically controlled valve, that has been preselected and stored in the micro-processor.

Abstract: An angular position sensor is provided by disposing two sensors proximate a rotatable member. A stationary sensor is located in a fixed position and a movable sensor is pivotable about the center of rotation of the rotatable member. A software routine uses a first output signal from the stationary sensor to calculate the rotational speed of the rotatable member. The software also determines a time offset between the receipt of a signal pattern by the stationary sensor and a subsequent receipt of the same pattern by the movable sensor. Using this time offset and the rotational speed of the rotatable member, the angular difference between the positions of the movable and stationary sensors can be developed. This angular difference is equivalent to the throttle position.