Hunter Marine HUNTER 25 Owner'S Manual Download

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Dangers Of Carbon Monoxide In The Water

On many boats, carbon monoxide from your main engine or generator or those of another boat
can accumulate in high concentrations beneath the swim-platform. Carbon monoxide can also
accumulate between boats, boats and docks, and below docks and other structures.
Accumulations of carbon monoxide at or near the surface of the water can present the risk of
carbon monoxide poisoning to anyone swimming in or otherwise near the water surface.
Children are especially vulnerable, as they tend to playfully swim near swim-platforms and
docks where accumulations of carbon monoxide may be present. NEVER swim or allow others
to swim if a generator or engine is running. Never swim or allow others to swim while in a
marina or where other boats or structures are present.

How To Minimize The Accumulation Of Carbon Monoxide

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Practice good inspection and maintenance habits.

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Be certain hull exhaust outlets are not blocked or restricted in any way.

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Be alert for exhaust gasses from other boats.

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Always provide adequate ventilation when weather enclosures are in place and engine
or generator is running.

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Orient your boat to maximize the dispersion of CO.

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Be aware of the effects of your actions on other boats.

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Be aware of the effects of the actions of others on your boat.

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Provide adequate ventilation when open flame appliances are used in the cabin.

Preventative Maintenance

Frequent inspections and proper maintenance of the engine, generator, and exhaust systems as
well as other various areas of your boat are critical in preventing the accumulation of carbon
monoxide. It is the owner's responsibility to make sure that the entire boat is inspected and
maintained against CO.

The exhaust systems of your engine and generator are under constant attack from salt water,
gasses, vibration and normal wear. Inspect every exhaust system component often. Start with a
visual inspection. Check each joint for discoloration, carbon buildup, stains, water leaks or other
signs of damage. Inspect all metal parts for corrosion, discoloration or flaking. Check that all hose
clamps are in good condition and properly tightened. Carefully inspect all exhaust and cooling
hoses for signs of wear, dry rot, cracking, discoloration, chafing or swelling. If any of these
conditions exist, have the entire system inspected and corrected by a qualified technician before
starting the engine or generator.

Next, start the engine and generator one at a time. Follow the full run of the exhaust system,
listening and looking for leaks. While doing this, make sure there is adequate ventilation and that
your CO detector is on.

Other items to inspect are as follows: If your boat has access panels, check that the access panels
around the engine and exhaust are in place and fit snugly to minimize the opportunity for CO to
enter the cabin. There should be no large openings where CO could enter the cabin. Ensure that all
ventilation systems are in good working order, and not blocked or punctured. Check all sink drains
to ensure that they have a good water trap to prevent CO from coming in from the outside.

Finally, because poorly running engines produce excessive CO, make sure engine and generator are
tuned up. They should run smoothly and not produce black smoke. The fuel system and air filters
should be in good order.