초록 ▼

A watercraft has an exhaust system. The exhaust system has a first portion cooled by cooling jackets and a second portion cooled by merged flow. The first portion is coupled to the second portion with a flexible coupling having an undulating surface. An overheat detection system is positioned proxim

A watercraft has an exhaust system. The exhaust system has a first portion cooled by cooling jackets and a second portion cooled by merged flow. The first portion is coupled to the second portion with a flexible coupling having an undulating surface. An overheat detection system is positioned proximate the flexible coupling. The overheat detection system is arranged to detect a rapid increase in temperature resulting from a blocked cooling jacket. During periods of normal operation, a first temperature reading is detected. During periods of abnormal operation, a rapid increase in temperature indicates a sudden decrease in cooling water within the cooling jacket. Warning signals are emitted to the operator by an overheat prevention unit to advise the operator of the condition.

대표청구항 ▼

1. A watercraft comprising a hull having an engine compartment, an internal combustion engine mounted within the engine compartment, the engine comprising at least one cylinder and an exhaust system communicating with the cylinder, the exhaust system comprising a first portion and a second portion,

1. A watercraft comprising a hull having an engine compartment, an internal combustion engine mounted within the engine compartment, the engine comprising at least one cylinder and an exhaust system communicating with the cylinder, the exhaust system comprising a first portion and a second portion, the first portion connected to the second portion by a flexible coupling member, the first portion having a water jacket defined between a first member and a second member and an exhaust passage defined by the first member, the first member having a first opening such that the water jacket and the exhaust passage are in fluid communication, a sensor mounted proximate the first opening to detect a temperature and a second opening downstream of the first opening, the sensor being positioned at least partially within the water jacket adjacent the first opening.