Air Intake/Silencer - Westerbeke 44A FOUR-35 C THREE Operator's Manual

COOLING SYSTEM
Zinc Anode
~ zi~c ~o~e,
or
pencil,
is located in the raw water cooling
CIrCUIt wIthin the heat exchanger. The purpose of having
zinc
~odes
is to sacrifice them to electrolysis action taking
place
In
the raw water cooling circuit, thereby reducing the
effects of electrolysis on other components of the system.
The condition of the zinc anode should be checked monthly
and the anode cleaned or replaced as required. Spare anodes
should be carned on board.
NEW
REPLACE
CLEAN & REUSE
NOTE:
Electrolysis action is the resultof each particular
installation and vessel location; not that of the engine.
If the zinc anodes need replacement, hold the hex boss into
which the zinc anode is threaded with a wrench while loos-
ening the anode with another wrench. This prevents the hex
boss from possibly tearing off the exchanger shell. After
removing the zinc, note the condition of it. If the zinc is in
poor condition, there are probably a lot of zinc flakes within
the exchanger. Remove the end of the heat exchanger and
clean the inside of all zinc debris. Always have a spare heat
exchanger end gasket in case the present one becomes dam-
aged when removing the end cover. Replace the gasket (refer
to your engine model's heat exchanger end gasket part num-
ber), O-ring and cover, and install a new zinc anode.
NOTE:
The threads of the zinc anodes are pipe threads and
do not require sealant. Sealant should not be used as it
may
insulate the zinc from the metal of the heat exchanger hous-
ing preventing electrolysis action on the zinc.
Heat Exchanger Service
After approximately 1000 hours of operation, remove, clean
and pressure test the engine's heat exchanger. (A local auto-
motive radiator shop should be able to clean and test the heat
exchanger.)
NOTE:
Operating in silty and/or tropical waters may require
that a heat exchanger cleaning be performed more often than
every 1000 hours.
AIR INTAKE
I
SILENCER
Description
A marine diesel engine running at high speed will typically
consume more than 6,000 cubic feet of air per hour. Not only
must the engine room be well ventilated, the air flow into the
engine must be unrestricted.
Air Filter
The air filter cartridge prevents engine room dust and dirt
from entering the engine,
Maintenance
The filter should be cleaned every 100 operating hours. Tap
the cartridge on a flat surface to dislodge loose dirt or clean .
off with compressed air. If the cartridge is badly contaminated
or oily, replace it.
Engines & Generators
18
"'~~~~----FILTER
CARTRIDGE