What options are there for blocking noise from i/o boat motors
Marine products need to be produced to withstand the harsh marine environments. Our
best product would be Vibration Damping & Noise Tiles . While these are widely used underneath equipment to reduce equipment vibration, they can also be cut and layered inside compartments and tucked into tight spots to deal with engine noise and the added benefit of helping vibrations where equipment may be touching or close to touching. A similair product and just as durable is our mass loaded vinyl barrier. This can be affixed to the compartment and areas surrounding
Where pipes and hoses come in contact with the boat or where they travel through compartments a combination of pipe wrap or duct lagging can be used as the noise does travel from the engine through houses and to the fiberglass structure of the boat. Reducing all these areas of contact will help. This can also be mounted on the surface facing the passenger area of the boat if the engine is beneath a bench or removable panels in a dry compartment.
Hope these suggestions help and happy boating.