A fuel feed unit has a base body with an intake channel section, into which a fuel opening opens. A partition wall section divides the intake channel section into a mixture channel and an air channel. The wall section has a recess in which the throttle flap at least partially lies in an end position. The wall section has, upstream of the recess, a continuous surface facing the mixture channel and which has lateral sections adjacent to the channel wall and a middle section running between the lateral sections. The lateral sections have, upstream of the throttle flap, a separation edge for the flow. In the end position, the side of the throttle flap facing the mixture channel defines a reference plane which divides the unit into a first region and a second region. The lateral sections extend, at least directly upstream of the recess, into the second region.

Provided is an opening/closing mechanism for an intake member which enables backlash suppression a working member and positioning of a choke lever. The opening/closing mechanism includes the intake member that accommodates a filter part and has an opening leading to a carburetor at an end wall portion facing the filter part; an opening/closing member that is disposed between the filter part and the end wall portion, and opens and closes the opening; and a working member that is disposed on a side opposite to the opening/closing member with the end wall portion interposed therebetween. The working member includes an arm portion that extends along the end wall portion and is coupled with the opening/closing member at one end by sandwiching the end wall portion therebetween, and a holding portion that is provided at the other end of the arm portion, the intake member has a guide hole into which the arm portion is inserted to guide movement of the arm portion, the guide hole has a first fixing portion that fixes the arm portion on one side in a movement direction of the arm portion, and a second fixing portion that fixes the arm portion on the other side in the movement direction of the arm portion, and widths of the first fixing portion and the second fixing portion of the guide hole are respectively equal to or less than a width of the arm portion.

Provided is an opening/closing mechanism for an intake member which enables backlash suppression a working member and positioning of a choke lever. The opening/closing mechanism includes the intake member that accommodates a filter part and has an opening leading to a carburetor at an end wall portion facing the filter part; an opening/closing member that is disposed between the filter part and the end wall portion, and opens and closes the opening; and a working member that is disposed on a side opposite to the opening/closing member with the end wall portion interposed therebetween. The working member includes an arm portion that extends along the end wall portion and is coupled with the opening/closing member at one end by sandwiching the end wall portion therebetween, and a holding portion that is provided at the other end of the arm portion, the intake member has a guide hole into which the arm portion is inserted to guide movement of the arm portion, the guide hole has a first fixing portion that fixes the arm portion on one side in a movement direction of the arm portion, and a second fixing portion that fixes the arm portion on the other side in the movement direction of the arm portion, and widths of the first fixing portion and the second fixing portion of the guide hole are respectively equal to or less than a width of the arm portion.

An opening/closing mechanism of an intake member includes: an intake member that accommodates a filter part and has an opening leading to a carburetor in an end wall opposing the filter part; an opening/closing member disposed between the filter part and the end wall, and opens/closes the opening; and a working member disposed on an opposite side to the opening/closing member so as to interpose the end wall, and allows the opening/closing member to be operated. The working member includes: an arm part which extends along the end wall and is linked with the opening/closing member to interpose the end wall at one end part, and a holding part provided to another end part of the arm part. The intake member has a guide hole into which the arm part is inserted and guides movement of the arm part.

An opening/closing mechanism of an intake member includes: an intake member that accommodates a filter part and has an opening leading to a carburetor in an end wall opposing the filter part; an opening/closing member disposed between the filter part and the end wall, and opens/closes the opening; and a working member disposed on an opposite side to the opening/closing member so as to interpose the end wall, and allows the opening/closing member to be operated. The working member includes: an arm part which extends along the end wall and is linked with the opening/closing member to interpose the end wall at one end part, and a holding part provided to another end part of the arm part. The intake member has a guide hole into which the arm part is inserted and guides movement of the arm part.

Provided is an opening/closing mechanism for an intake member which enables backlash suppression a working member and positioning of a choke lever. The opening/closing mechanism includes the intake member that accommodates a filter part and has an opening leading to a carburetor at an end wall portion facing the filter part; an opening/closing member that is disposed between the filter part and the end wall portion, and opens and closes the opening; and a working member that is disposed on a side opposite to the opening/closing member with the end wall portion interposed therebetween. The working member includes an arm portion that extends along the end wall portion and is coupled with the opening/closing member at one end by sandwiching the end wall portion therebetween, and a holding portion that is provided at the other end of the arm portion, the intake member has a guide hole into which the arm portion is inserted to guide movement of the arm portion, the guide hole has a first fixing portion that fixes the arm portion on one side in a movement direction of the arm portion, and a second fixing portion that fixes the arm portion on the other side in the movement direction of the arm portion, and widths of the first fixing portion and the second fixing portion of the guide hole are respectively equal to or less than a width of the arm portion.

Provided is an opening/closing mechanism for an intake member which enables backlash suppression a working member and positioning of a choke lever. The opening/closing mechanism includes the intake member that accommodates a filter part and has an opening leading to a carburetor at an end wall portion facing the filter part; an opening/closing member that is disposed between the filter part and the end wall portion, and opens and closes the opening; and a working member that is disposed on a side opposite to the opening/closing member with the end wall portion interposed therebetween. The working member includes an arm portion that extends along the end wall portion and is coupled with the opening/closing member at one end by sandwiching the end wall portion therebetween, and a holding portion that is provided at the other end of the arm portion, the intake member has a guide hole into which the arm portion is inserted to guide movement of the arm portion, the guide hole has a first fixing portion that fixes the arm portion on one side in a movement direction of the arm portion, and a second fixing portion that fixes the arm portion on the other side in the movement direction of the arm portion, and widths of the first fixing portion and the second fixing portion of the guide hole are respectively equal to or less than a width of the arm portion.

An improvement to snowmobile choke lever lift pull on/off assemblies that use a manual style choke system incorporating a single or plurality cable system. The sockets that engage the cables of the cable system may be provide lateral or upper access ports. The choke lever at the distal end of the assembly may be movable from a first position to a second position by engaging the cable system, wherein an actuating element returns the choke lever to the first position. The present invention affords replacement of existing choke lever assemblies, wherein the choke lever and other components of the present invention may be made from metallic materials that increase the assembly's durability and half-life.

An improvement to snowmobile choke lever lift pull on/off assemblies that use a manual style choke system incorporating a single or plurality cable system. The sockets that engage the cables of the cable system may be provide lateral or upper access ports. The choke lever at the distal end of the assembly may be movable from a first position to a second position by engaging the cable system, wherein an actuating element returns the choke lever to the first position. The present invention affords replacement of existing choke lever assemblies, wherein the choke lever and other components of the present invention may be made from metallic materials that increase the assembly's durability and half-life.

The utility model provides a gas idling transition passage structure for oil and gas dual-purpose carburetor, comprising a carburetor body 1 and a mixing chamber 4; a choke valve 5 and a throttle valve 9 are disposed in the mixing chamber 4 in the order of the air flow direction; a gas intake pipe 2 for supplying gas to the mixing chamber 4 is disposed on the carburetor body 1; a first air inlet pipe 7 and a second air inlet pipe 8 are disposed in the carburetor body 1 in parallel; an opening of an outlet end of the second air inlet pipe 8 is located in the mixing chamber 4 and the position of the outlet end of the second air inlet pipe 8 is at the intersection of an outer circle and the mixing chamber 4 when the throttle valve 9 is closed.