Abstract: A two speed transmission including an input shaft; a lay shaft spaced from the input shaft; a first gear train connecting the input shaft to the lay shaft; a second gear train connecting the lay shaft to an output shaft, the gear train including a one way clutch or similar; and a clutch for engaging the input shaft with the output shaft. When the clutch is disengaged, power is transmitted from the input shaft via the gear trains and the lay shaft via the one way clutch to the output shaft which typically provides first or low gear for use in low speed maneuvering or where greater torque is required. With the clutch engaged, power may be transmitted from the input shaft directly to the output shaft to provide a second gear for when the watercraft is cruising.

Abstract: A decoupler 10 having a rotatable input member 12 for coupling to a drive unit 13 and a rotatable output member 28 for coupling to an output drive, and a gear set 34 for transmitting drive from the rotatable input member 12 to the rotatable output member 28, wherein the decoupler 10 is operable to selectively isolate an input gear 36 of the gear set 34 from driving connection with the drive unit 13, and to selectively engage the input gear 36 into driving connection with the drive unit 13. The invention also relates to a method of transmitting torque and to a method of installing the decoupler 10.

Abstract: A decoupler 10 having a rotatable input member 12 for coupling to a drive unit 13 and a rotatable output member 28 for coupling to an output drive, and a gear set 34 for transmitting drive from the rotatable input member 12 to the rotatable output member 28, wherein the decoupler 10 is operable to selectively isolate an input gear 36 of the gear set 34 from driving connection with the drive unit 13, and to selectively engage the input gear 36 into driving connection with the drive unit 13. The invention also relates to a method of transmitting torque and to a method of installing the decoupler 10.

Abstract: A two speed transmission includes an input shaft; a lay shaft spaced from the input shaft; a first gear train connecting the input shaft to the lay shaft; a second gear train connecting the lay shaft to an output shaft the gear train including a one way clutch or similar; and a clutch for engaging the input shaft with the output shaft. The transmission is arranged such that when the output shaft is disengaged from the input shaft power is transmitted to the output shaft via the first and second gear trains and the lay shaft. When the clutch is disengaged, power is transmitted from the input shaft via the gear trains and the lay shaft via the one way clutch to the output shaft which typically provides first or low gear for use in low speed maneuvering or where greater torque is required. With the clutch engaged, power may be transmitted from the input shaft directly to the output shaft to provide a second gear for when the watercraft is cruising.