Westerbeke Vire 7, Руководство пользователя, Страница: 16 / 43

Cooling
A rubber gear type cooling water pump has been installed in the reverse/reduction gear. This
pump draws water from under the boat and pushes it through the casing the exhaust collector
first and through the cylinder casing after that. The water leaves the engine from the top of the
cylinder casing which prevents formation of air in the cylinder casing. The cooling water is slightly
pre-warmed in the exhaust collector. The cooling water from the cylinder can be exhausted either.
directly or through the exhaust gas pipe. In the latter case the exhaust gas pipe has to be
constructed so as to prevent water from entering the engine (see installation instructions:
"Exhaust Pipe and Cooling System
@
). In case the cooling water is led to the exhaust gas pipe. a
part of This pipe can be made of flexible material such as rubber or plastic. which facilitates
installation.
To remove water from cylinder casing and exhaust collector both are equipped with screw plugs.
Carburetor
For the purpose of propelling fuel the carburetor has a diaphragm pump which gets its power
from the pressure changes in the crank case (over-pressure/under-pressure). The fuel comes
through the bottom filter to the diaphragm pump and from there on to the chamber in the middle
of the carburetor, which is also connected with the jets. When the chamber is filled, its membrane
type bottom will cause the fuel valve to close, thus stopping further fuel from entering.
To achieve a richer mixture when starting a cold engine, the air suction is reduced by the choke
valve.
Figure 6. Carburetor
1. Throttle Lever 5. Gasoline needle valve
2. Adjusting screw (idling) 6. Subpressure line
3. Choke Lever 7. Strainer lid
4. Adjusting idling jet screw 8. Air filter
Magneto