A device for specifying the power of an electric drive of a boat includes a hand-actuatable drive which can be positioned between a zero setting, in which the electric drive is stationary, and a maximum setting, in which the electric drive is operated at its nominal power. The device also includes a hand-actuatable overload switching device, on actuation of which the electric drive is operated in an overload operation.

Disclosed is an control device of an outboard motor, including: a computation unit configured to set, as a starting point, a timing before a gearshift mechanism is shifted from forward to neutral after an accelerator opening level is fully closed in a case where an operator's manipulation is performed from forward to neutral, and compute a time-series change of an engine rotation speed as a simulated ship speed on the basis of the engine rotation speed detected by an engine rotation speed detector at the starting point; and a control unit configured to control an actuator such that, in a case where the operator's manipulation is performed from forward to reverse through neutral, the gearshift mechanism is maintained in the neutral position until the simulated ship speed estimated by the computation unit becomes a predetermined threshold value or lower, and is then shifted to reverse.

Disclosed is an control device of an outboard motor, including: a computation unit configured to set, as a starting point, a timing before a gearshift mechanism is shifted from forward to neutral after an accelerator opening level is fully closed in a case where an operator's manipulation is performed from forward to neutral, and compute a time-series change of an engine rotation speed as a simulated ship speed on the basis of the engine rotation speed detected by an engine rotation speed detector at the starting point; and a control unit configured to control an actuator such that, in a case where the operator's manipulation is performed from forward to reverse through neutral, the gearshift mechanism is maintained in the neutral position until the simulated ship speed estimated by the computation unit becomes a predetermined threshold value or lower, and is then shifted to reverse.

A method of controlling reverse thrust by a propulsion device on a marine vessel includes determining that the propulsion device is situated to effectuate a reverse thrust and determining an initial trim position of the propulsion device. An engine RPM or an engine torque of the propulsion device is then controlled to effectuate a reverse thrust, and a trim position of the propulsion device is monitored. If a threshold increase in trim position from the initial trim position is detected at an increased engine RPM or an increased engine torque, then a reverse thrust limit is calculated based on the increased engine RPM or increased engine torque. The engine RPM of the propulsion device is then controlled so as not to exceed the reverse thrust limit while the propulsion device is effectuating the reverse thrust.

A method of controlling reverse thrust by a propulsion device on a marine vessel includes determining that the propulsion device is situated to effectuate a reverse thrust and determining an initial trim position of the propulsion device. An engine RPM or an engine torque of the propulsion device is then controlled to effectuate a reverse thrust, and a trim position of the propulsion device is monitored. If a threshold increase in trim position from the initial trim position is detected at an increased engine RPM or an increased engine torque, then a reverse thrust limit is calculated based on the increased engine RPM or increased engine torque. The engine RPM of the propulsion device is then controlled so as not to exceed the reverse thrust limit while the propulsion device is effectuating the reverse thrust.

A marine drive includes an internal combustion engine that drives a propulsor into rotation to effect a thrust, and a transmission that shifts amongst a forward gear for a forward thrust, a reverse gear for a reverse thrust, and a neutral state for a zero thrust. The marine drive further includes a shift rod rotatable about its own axis to shift the transmission amongst forward, reverse, and neutral, and an actuator. The actuator includes an actuator motor that rotates an output shaft and a gear shaft that effectuates rotation of a shift rod. The output shaft is connected to a gear shaft through a first gearset such that rotation of the output shaft causes the rotation of the gear shaft, and the gear shaft is connected to the shift rod through a planetary gearset such that rotation of the gear shaft causes the rotation of the shift rod.

A motorcycle wheel attachment or replacement of the existing drive pulley used on the rear rubber cushioned wheel of motorcycles and trikes. The attachment or replacement contains an apparatus that allows the operator of the motorcycle or trike to ride the motorcycle or trike in forward or reverse drive using a control linkage or electrical switch.

A motorcycle wheel attachment or replacement of the existing drive pulley used on the rear rubber cushioned wheel of motorcycles and trikes. The attachment or replacement contains an apparatus that allows the operator of the motorcycle or trike to ride the motorcycle or trike in forward or reverse drive using a control linkage or electrical switch.

A propulsion device for a ship capable of preventing idling of a propeller without any limitation on the type of clutch. The propulsion device includes: a forward and reverse switching clutch (17) for transmitting the driving power from an input shaft (11) to a forward gear (13A) or a reverse gear (13B); a forward one-way clutch (18A), disposed between the input shaft (11) and the forward gear (13A), for connecting the forward gear (13A) and the input shaft (11) when the forward gear (13A) is rotated at a higher speed than that of the input shaft (11); and a reverse one-way clutch (18B), disposed between the input shaft (11) and the reverse gear (13B), for connecting the reverse gear (13B) and the input shaft (11) when the reverse gear (13B) is rotated at a higher speed than that of the input shaft (11).

A transmission is for a marine drive. The transmission comprises an input shaft that is caused to rotate by the marine drive and an output shaft that is caused to rotate by the input shaft. The input shaft and output shaft are operatively connected to each other such that forward rotation of the input shaft causes forward rotation of the output shaft when the transmission is shifted into a forward gear, and such that forward rotation of the input shaft causes reverse rotation of the output shaft when the transmission is shifted into a reverse gear. A planetary gearset operatively couples the input shaft to the output shaft only when the transmission is shifted into the reverse gear.