Sanshin Kogyo Kabushiki Kaisha

Hideto Arai

Kazumasa Tanimoto

Takio Ogasawara

Seiji Kobayashi

A shift and throttle control mechanism allows for control of the shift and throttle features of an outboard motor through two separate operators. For instance, one operator can be remotely positioned in the hull of an associated watercraft, while the other operator can be formed on a steering handle of the outboard motor. The shift and throttle control mechanism is also configured to fit within a cowling of the outboard motor, together with a four-cycle engine, without significantly increasing the size of the cowling. In one mode, the shift and throttle control mechanism includes a shift shaft arranged toward the front side of the engine. One of the operators is directly connected to shift shaft by a linkage rod. The other operator is connected by a shift control cable to a shift lever that is located on the side of the engine. This location of the shift lever allows the end of the shift control cable to be fixed within the cowling without increasing the cowling's size. A link connects the shift lever to the shift shaft, which in turn actuates a shift rod to control a transmission of the outboard motor.

Outboard motor control

An outboard motor outer cover arrangement The outboard motor is comprised primarily of a powerhead and a drive shaft housing and lower unit which depends from the powerhead. The powerhead is comprised of an internal combustion engine and a surrounding protective cowling. The protective cowling comprises a lower tray portion and a detachable main cowling portion that is detachably connected to the tray portion. An exhaust guide is provided at the upper end of the drive shaft housing and lower unit and the engine is supported on this guide plate as is the tray. A cover is detachably connected to the underside of the exhaust guide and is positioned in partially surrounding relationship to the upper portion of the drive shaft housing and lower unit so as to provide a neat appearance.

Cover arrangement for outboard motor

An engine control mechanism cooperates with both a manual choke operator and a manual throttle operator. The manual throttle operator actuates a throttle control mechanism and a timing advance mechanism. A lost motion connection interconnects the manual throttle operator and the throttle control mechanism. The manual choke operator actuates a choke control mechanism to close the choke valves associated with the engine charge formers. The manual choke also operates the timing advance mechanism and the throttle control mechanism to advance the spark timing and to slightly open the throttle valves beyond an idle position when the choke valves are closed. Operation of the throttle control mechanism via the manual choke operator, however, does not affect the manual throttle operator due to the lost motion connection between the throttle operator and the throttle control mechanism.

Control mechanism for engine throttle and choke valves

Three embodiments of a cowling and air inlet device for a power head of an outboard motor are disclosed and described which include an air inlet formed in an upper rear surface of the cowling and an air intake duct formed within the air inlet for supplying air to the engine induction system. Various arrangements of partitions are provided within the air inlet for permitting adequate air flow to the engine induction system but preventing water from entering the interior of the cowling and engine induction system. A cover portion which may be separate or part of the upper surface of the cowling is positioned above the air intake duct and at least a portion of the cover is higher than the upper surface of the cowling. This cover portion also has at least one opening therein for permitting air from the atmosphere to enter the air inlet. These cowling and air device arrangements provide a sufficiently large space between the top of the air intake duct and the cover portion to reduce noise resulting from the flow of air around the top of the air intake duct.

Growing community of inventors

Hamamatsu, Japan

Hideto Arai