Westerbeke 50 User Manual

10 feet.
Most exhaust systems today use a water lift type muffler such as
the Westerbeke "Hydro-Hush". In most installations there is a dry,
insulated high loop after the engine manifold and before the muffler
to prevent water flowing backwards into the engine during cranking.
It is essential not to hang too much weight in the form of exhaust
system components rigidly from the engine manifold. Generally, it is
permissable to directly connect a pipe nipple and a water jacketed
exhaust elbow, which two components weigh about 8 pounds (4 kg). If
there are more components to be rigidly connected to each other than
will weigh 8 pounds, then a flexible exhaust section must be installed
between the manifold outlet and the exhaust system.
WAT(~ DISCIo4ItR.G£
WATEA. Llrr O''"IAUS,T !.YSTEM
WI TH HYOtl;O-,",U~ MUFF"LE:j
1-3/"" 0,0.
'-3/~" o.o~ __ ...--,-_S-3/8"
, 1-1/2"
OIA.
!'4UFFLER.. PH 131710
EXHAUST SYSTEM WITH WATER JACKETED
STANDPIPE
WATER LIFT EXHAUST SYSTEM WITH
"HYDRO-HUSH MUFFLER"
The exhaust system must be supported or suspended independently of
the engine manifold, usually using simple metal hangers secured to the
overhead.
All dry portions of the exhaust system should be wrapped in
suitable insulation material to keep surface temperatures as low as
possible.
Many installations use flexible rubber exhaust hose for the water
cooled section of the exhaust line because of the ease of installation
and flexibility. Provide adequate support for the rubber hose to pre-
vent sagging, bending and formation of water pockets.
Always arrange the rubber hose section so that water cannot
possibly flow back into the engine. Also make sure that entering sea
water cannot spray directly against the inside of the exhaust piping.
Otherwise, excessive erosion will occur.
MEASURING EXHAUST GAS BACK PRESSURE
Back pressure must be measured on a straight section of the
exhaust line and as near as possible to the engine exhaust manifold.
The engine should be run at maximum load during the measurement
period. Set-up should be as shown below.
1. For normally asperated engines:
Pressure Test Mercury Test
1-1/2" Max PSI 3" Mercury
2. For turbo-charged engines:
Pressure Test Mercury Test
0.75 Max PSI 1-1/2" Mercury
9
Water Column
= 39"
Water Column
= 19-1/2"

Westerbeke 50 Specifications

General

Brand	Westerbeke
Model	50
Category	Engine
Language	English