Abstract: An engine is disposed in a top cowling. Burned gas produced in the engine is discharged to the outside through a first exhaust pipe, a second exhaust pipe, a third exhaust pipe, exhaust passage, and a exhaust passage. A catalyst is disposed to be housed in the first exhaust pipe and the second exhaust pipe. The first exhaust pipe and the second exhaust pipe are disposed in the top cowling. A fan is provided above the catalyst. As a result of this unique structure, a temperature increase in the cowling is prevented from being caused by heat radiated from the catalyst.

Abstract: A remote control system for a marine drive includes a change element that changes an operational condition of the marine drive. An actuator actuates the change element. An ECU controls the actuator. A remote controller is remotely placed from the ECU. The remote controller has a control lever. A mechanical cable has ends. One end is coupled with the control lever. A potentiometer outputs a command signal to the ECU. The potentiometer has an input lever. Another end of the mechanical cable is coupled with the input lever. The input lever moves along with the control lever when the control lever is operated. The potentiometer generates the command signal in accordance with a position of the input lever. The control device controls the actuator based upon the command signal.

Abstract: An outboard motor is provided that is capable of reliably separating water and air sucked in from an intake port and efficiently draining the separated water. The motor can comprise a cowling, a right-side intake port, a left-side intake port, first and second water separating portions, a communication port, and an engine compartment. The right-side intake port can be formed in a right side surface portion of an upper portion of the cowling. The left-side intake port can be formed in a left side surface portion of the upper portion of the cowling. The first water separating portion can have an intake passage communicating between the right-side intake port and the left-side intake port. The second water separating portion can communicate with the first water separating portion through the communication port, and the second water separating portion can communicate with the engine compartment.

Abstract: A high frequency delay circuit operable to output a high frequency signal delayed for a desired delay time. The high frequency delay circuit includes: a variable delay circuit operable to receive a reference signal of which a frequency is lower than the high frequency signal, and to output a delay reference signal delayed from the reference signal for the desired delay time in advance; and a multiplier operable to generate the high frequency signal, of which a frequency is a frequency of the delay reference signal multiplied by a predetermined value, and to output the generated high frequency signal at timing according to a phase of the delay reference signal.

Abstract: An outboard motor can comprise a cowling for covering an engine, a high pressure fuel supply system, and a low pressure fuel supply system. The high pressure fuel supply system can have a vapor separator tank and a high pressure fuel pump. The low pressure fuel supply system can have a low pressure fuel pump. A heat insulating chamber, defined from a space for accommodating the engine, can be formed within the cowling. The heat insulating chamber houses the low pressure fuel pump and the fuel filter.

Abstract: A high frequency delay circuit operable to output a high frequency signal delayed for a desired delay time. The high frequency delay circuit includes: a variable delay circuit operable to receive a reference signal of which a frequency is lower than the high frequency signal, and to output a delay reference signal delayed from the reference signal for the desired delay time in advance; and a multiplier operable to generate the high frequency signal, of which a frequency is a frequency of the delay reference signal multiplied by a predetermined value, and to output the generated high frequency signal at timing according to a phase of the delay reference signal.

Abstract: A high frequency delay circuit operable to output a high frequency signal delayed for a desired delay time. The high frequency delay circuit includes: a variable delay circuit operable to receive a reference signal of which a frequency is lower than the high frequency signal, and to output a delay reference signal delayed from the reference signal for the desired delay time in advance; and a multiplier operable to generate the high frequency signal, of which a frequency is a frequency of the delay reference signal multiplied by a predetermined value, and to output the generated high frequency signal at timing according to a phase of the delay reference signal.

Abstract: A fuel supply device can have a low pressure fuel pump that supplies fuel to a vapor separator tank positioned adjacent to an engine from a main fuel tank disposed in a hull. An electrically operated primary fuel pump (e.g., a primer pump) and a check valve can both be positioned parallel to each other and between the main fuel tank and the low pressure fuel pump. A control device can be connected to the primary fuel pump for operating the primary fuel pump only for a preset fuel supply time when starting the engine is attempted and prior to the start of the engine.

Abstract: There is provided a semiconductor test apparatus which assuredly detects an inhibited edge only which affects a test pattern and truly requires an error warning. This semiconductor test apparatus includes: a real time selector which receives a plurality of sets of waveform data, receives a plurality of sets of timing data, selects and outputs predetermined waveform data and timing data, inhibits a next edge immediately following the current edge and outputs an inhibiting signal when an edge with the same polarity which is continuous in an interval shorter than a proximity limit time exists in the waveform data; and a detector which receives the waveform data, the timing data and the open signal, and outputs fail signal when an edge with a polarity reverse to that of an inhibited edge exists in the proximity limit time before the inhibited edge.

Abstract: An outboard motor is provided that is capable of reliably separating water and air sucked in from an intake port and efficiently draining the separated water. The motor can comprise a cowling, a right-side intake port, a left-side intake port, first and second water separating portions, a communication port, and an engine compartment. The right-side intake port can be formed in a right side surface portion of an upper portion of the cowling. The left-side intake port can be formed in a left side surface portion of the upper portion of the cowling. The first water separating portion can have an intake passage communicating between the right-side intake port and the left-side intake port. The second water separating portion can communicate with the first water separating portion through the communication port, and the second water separating portion can communicate with the engine compartment.

Abstract: An engine includes a throttling device configured for both mechanical and electrical control. For example, the throttling device can include a throttle cable connection assembly configured to allow a throttle valve shaft of the throttling device to be controlled by movement of throttle cables and an electronic control section configured to allow the throttle valve to be moved by an electronic actuator. The throttling device can include a connector member configured to selectively engage and disengage the mechanical control section from the throttle valve shaft so as to allow the electrical control section to adjust the throttle valve shaft without resistance from the mechanical control section. The engine can also include a switch for indicating to an electronic controller whether or not the mechanical control section is engaged with a throttle valve shaft.

Abstract: A system for replenishing a lubricant pan with the lubricant comprises a lubricant tank provided separately from the lubricant pan. A lubricant replenishing pump is provided in the lubricant tank for replenishing the lubricant pan with the lubricant. A lubricant level sensor is adapted to detect the lubricant level in the lubricant tank upon a main switch of an engine being turned on. The lubricant replenishing pump is operated according to the detected lubricant level to replenish the lubricant pan with a specified replenishing amount of the lubricant from the lubricant tank.

Abstract: An outboard motor can comprise a cowling for covering an engine, a high pressure fuel supply system, and a low pressure fuel supply system. The high pressure fuel supply system can have a vapor separator tank and a high pressure fuel pump. The low pressure fuel supply system can have a low pressure fuel pump. A heat insulating chamber, defined from a space for accommodating the engine, can be formed within the cowling. The heat insulating chamber houses the low pressure fuel pump and the fuel filter.

Abstract: A fuel supply device can have a low pressure fuel pump that supplies fuel to a vapor separator tank positioned adjacent to an engine from a main fuel tank disposed in a hull. An electrically operated primary fuel pump (e.g., a primer pump) and a check valve can both be positioned parallel to each other and between the main fuel tank and the low pressure fuel pump. A control device can be connected to the primary fuel pump for operating the primary fuel pump only for a preset fuel supply time when starting the engine is attempted and prior to the start of the engine.

Abstract: There is provided a semiconductor test apparatus which assuredly detects an opened edge only which affects a test pattern and truly requires an error warning or the like. This semiconductor test apparatus comprises: a real time selector 40 which receives a plurality of sets of waveform data output from a waveform memory 30, receives a plurality of sets of timing data output from a timing generator 20, selects and outputs predetermined waveform data and timing data, opens a continuous following edge in order to output an open signal when an edge with the same polarity which is continuous in an interval shorter than a proximity limit time exists in edges of the waveform data; and an open detector 50 which receives the waveform data, the timing data and the open signal output from the real time selector 40, and outputs fail signal when an edge with a polarity reverse to that of an opened edge exists in the proximity limit time before the opened edge.

Abstract: A high frequency delay circuit operable to output a high frequency signal delayed for a desired delay time. The high frequency delay circuit includes: a variable delay circuit operable to receive a reference signal of which a frequency is lower than the high frequency signal, and to output a delay reference signal delayed from the reference signal for the desired delay time in advance; and a multiplier operable to generate the high frequency signal, of which a frequency is a frequency of the delay reference signal multiplied by a predetermined value, and to output the generated high frequency signal at timing according to a phase of the delay reference signal.

Abstract: A marine drive has a propulsion device. A transmission is coupled with the propulsion device. A shift mechanism moves the transmission between a first position in which the propulsion device is set to a first mode and a second position in which the propulsion device is set to a second mode. The shift mechanism has a shift unit movable between a first shift position and a second shift position. The transmission moves to the first position while the shift unit moves toward the first shift position, and moves to the second position while the shift unit moves toward the second shift position. An electrically operable shift actuator is supported by the drive body. The shift actuator has an actuating member that preferably is detachably coupled with the shift unit.

Abstract: A system for replenishing a lubricant pan with the lubricant comprises a lubricant tank provided separately from the lubricant pan. A lubricant replenishing pump is provided in the lubricant tank for replenishing the lubricant pan with the lubricant. A lubricant level sensor is adapted to detect the lubricant level in the lubricant tank upon a main switch of an engine being turned on. The lubricant replenishing pump is operated according to the detected lubricant level to replenish the lubricant pan with a specified replenishing amount of the lubricant from the lubricant tank.

Abstract: An exhaust system for an internal combustion engine of an outboard motor is provided. The exhaust system provides dual exhaust passages, simplifying the engine's construction and reducing manufacturing costs, while optimizing engine performance. The exhaust system includes exhaust ports having equal lengths that avoid differential pressure losses across cylinders. The arrangement of the exhaust passages enables a cowling to have a tapered aerodynamic design.

Abstract: A remote control system for a marine drive includes a change element that changes an operational condition of the marine drive. An actuator actuates the change element. An ECU controls the actuator. A remote controller is remotely placed from the ECU. The remote controller has a control lever. A mechanical cable has ends. One end is coupled with the control lever. A potentiometer outputs a command signal to the ECU. The potentiometer has an input lever. Another end of the mechanical cable is coupled with the input lever. The input lever moves along with the control lever when the control lever is operated. The potentiometer generates the command signal in accordance with a position of the input lever. The control device controls the actuator based upon the command signal.