Westerbeke 38B FOUR Operator's Manual download pdf (Page 22)

Dry stack-type exhaust systems

(shown to the right) must be

at-

tached

the generator engine's

exhaust manifold

means

flexible connector pipe. This

system must be properly supported,

insulated, and routed

as not

allow water to enter the engine's

cylinders

coming in through

this piping. Provisions must be

made

for

discharging the engine's

raw cooling water overboard.

Exbaust System Failures

.z.

~I...""

....

...

CD""'::'"

j I

._-,

, .

~===14f.;;;1

71'~.~.

..,

........

e:.

XM5UL

Txo.1

51:_

••

TI:_

...

::C:

T"ftou,a.-

U,-I..

rXTTX

tf':l.

...

tt.

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DRY

STACt

EXHRUST

When the engine's

raw

water

fed

into an exhaust

system

that the

full

stream of this water strikes a

surface, erosion takes place. This erosion

may

cause premature failures. The proper design

either a

water jacketed or water injected

"wet"

exhaust system

prevent this problem requires that the raw water

inlet

positioned

that the entering stream

raw

water does not directly strike a surface. In addition,

the velocity

the entering

raw

water stream should be as

low

as possible, which can

achieved

having inlet fittings as big in diameter as possible.

The best protection against carbon monoxide poisoning is a daily inspection

the complete exhaust

system. Check for leaks around manifolds, gaskets, and

welds.

Make sure exhaust lines are not beating

surrounding areas excessively.

excessive heat is present, correct the situation immediately.

you

notice a change in the sound or appearance of the exhaust system, shut down the unit immediately and

have the system inspected and repaired at once

a qualified mechanic.

Make sure there are

unnecessary objects suspended from any portion of the exhaust lines. Rigidly

constructed exhaust risers installed off the exbaust manifold must not exceed 8 Ibs in total weight.

Excessive unsupported weight could cause deflection or distortion

the manifold resulting in damage

and/or internal leaks. Rigidly constructed riser assemblies that

exceed 8

Ibs.

must be supported

the

engine, not

the hull. Inspect insulated portions of the exhaust system

ensure there is no deterioration

of the insulation.

CAUTION

Prolonged cranking intervals without tbe engine starting can result in filling the

engine-mounted exbaust system witb sea water coolant. This may halJpen because

tbe sea water pump

pumping sea water tbrougb tbe sea

water

cooling system

during cranking. This sea

water

can enter tbe engine's cylinders by way of tbe

exbaust manifold once tbe exhaust system fills. Prevent tbis from balJpening by

closing tbe sea water supply througb-bull sbut-off, drain tbe exbaust

mumer,

and

correct tbe cause for the excessive engine cranking needed to obtain a start. Engine

damage resulting from tbis type of sea water entry is not a warrantable issue; tbe

owner/operator should keep tbis in mind.

WESTERBEKE GENERATORS

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Westerbeke 38B FOUR Operator's Manual Page 22

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