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PowerTech Marine Power System Manual

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EXHAUST SYSTEM:
When connecting the exhaust system to your Marine Power System special consideration must
be taken in its design, components used and Safety issues encountered with the installation. The design
and components used are relative to the location of the unit. That is, above or below the water line. In all
cases Safety is of prime importance. A well-designed leak free exhaust system is essential to the
operation and performance of the generator and to the Safety of the vessel and its occupants.
WARNING: Carbon Monoxide gas is present in exhaust gases produced by diesel engines. Carbon
Monoxide is a dangerous gas that can cause unconsciousness and is potentially lethal. Prevent the
acumination of exhaust gases in closed areas or from being drawn into such areas. Avoid still/calm
conditions, always exhaust downwind and away from others.
The Marine Power System comes equipped with the seawater pump, heat exchanger, exhaust
manifold and exhaust elbow already mounted to the engine and connected with the appropriate hoses.
The installer is responsible for attaching the remainder of the exhaust components in order to complete
the installation.
IMPORTANT: For installations where the Marine Power System is located below the water line
provisions MUST be made to install a siphon-break in the seawater supply hose connected to the water
injected exhaust elbow. The siphon-break will prevent the siphoning of seawater through the cooling
system. Without the siphon-break seawater will fill the exhaust system to a point that the exhaust
manifold and engine cylinders will be flooded. The siphon-break MUST be located at least 12”above the
water line at all angles of operation. Engine damage resulting from an un-installed or improperly
installed siphon-break is not a warrantable issue.
When installing the hydro muffler follow the manufacturers instructions regarding hose size and
location. It is generally recommended to locate the hydro muffler as close to the unit as practical.
Always exhaust in a downward direction and never loop the exhaust hose between the exhaust elbow
and hydro muffler. Avoid restrictions and unnecessary bends in the exhaust hose as they may cause
excessive backpressure and poor performance. It is advisable to check the backpressure with a Mercury
Manometer or similar gauge. Backpressure should not exceed 3” of Mercury (0.104 kg/cm²). Only use
exhaust hose and clamps that are appropriate for marine applications. For a leak free exhaust system,
securely mount and tighten all connections.
When the generator is not in operation it is important to prevent seawater from entering the
exhaust system. If the vessel experiences healing/backing down or like conditions, seawater could fill
the exhaust system and engine cylinders. To avoid such a situation a closure or valve should be installed
near the exhaust seacock fitting. Engine damage resulting from these conditions is not warrantable issue.
Your best protection against exhaust gas leakage is a daily inspection of the complete exhaust
system. Check for leaks around all components and junctions. Check surrounding areas for signs of
excessive heating. Listen for sound changes in the system. If any of the signs of exhaust leakage are
observed immediately shut down the unit and have a qualified mechanic inspect and repair the problem.
IMPORTANT: Circumstances may arise in which the engine will not start. Excessive cranking of the
engine creates a situation in which the seawater pump will fill the exhaust manifold and flood the engine
cylinders. To prevent this from happening, close the valve on the seawater supply line, drain off
accumulated seawater in the exhaust system and correct the starting problem. It is important the
owner/operator keeps this in mind. Engine damage under these circumstances is not a warrantable issue.
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