A water cooled exhaust tube, especially for boats, comprises an outer housing (
3
) formed as a tube, an inner tube (
1
) extending coaxially in the housing, at a radial distance from the latter, and a cam (
7
), extending in a screw line shaped manner in the longitudinal direction of the housing, spanning the distance between the housing (
3
) and the inner tube (
1
) and forming a channel (
11
), extending in a screw line shaped manner between the housing (
3
) and the inner tube (
1
). The inner tube (
1
) conducts the exhausts gases while the channel (
11
) conducts cooling water separately from the exhaust gases. The exhaust tube is flexible since all parts are made in rubber. In the inner tube (
1
) silencing means (
17
) can be arranged to from a silencer. The inner tube (
1
) is adapted to be replaceable int he outer housing (
3
) and can be a rubber hose.
水冷排气管,特别是用于船只的
水冷排气管,包括一个外罩 (
3
) 形成管状,内管 (
1
内管 ( 1 ) 与外壳同轴延伸,与外壳保持一定的径向距离,凸轮 (
7
) 在外壳的纵向以螺旋线的方式延伸,横跨外壳 (
3
) 和内管 (
1
) 之间的距离,并形成一个通道 (
11
在外壳 (
3
) 和内管 (
1
).内管 (
1
) 引导废气,而通道 (
11
) 将冷却
水与废气分开。排气管是柔性的,因为所有部件都是用橡胶制成的。内管 (
1
) 中的消音装置 (
17
) 可以安装消音器。内管 (
1
内管 ( 1 ) 可以在外罩 (
3
可以是橡胶管。