How to Insulate an Engine Compartment on a Boat


Boat engine compartments can be a source of unwanted noise, especially on an older boat or on a boat that has lost its original insulation from wear or rot. The noise projected from the engine compartment of a boat can be reduced by simply adding some new sound-suppressing insulation. The simplest insulation to install is backed with PSA, which stands for Pressure Sensitive Adhesive. By removing a plastic backing, the special foam insulation self-adheres to the inside of the engine compartment.

Things You'll Need

  • Quiet Barrier Specialty Composite insulation
  • Reinforced foil tape
  • Measuring tape
  • 150 grit or courser sandpaper
  • Pencil
  • Utility knife
  • 2- or 4-foot level
  • Open the engine cover and inspect the area where the insulation will be attached. The surface needs to be clean and dry. If applying to a smooth surface, scuff it with sandpaper, then remove any dust from the contact area.

  • Measure the inside of the engine cover using a tape measure. Lay the insulation out with the adhesive side facing down on a clean flat surface. Draw a line on the insulation with a pencil where the cuts need to be made.

  • Compress the foam insulation along the pencil line with a level and cut along the line using a sharp utility knife.

  • Make some reference marks with the pencil on the engine cover, if desired, to act as a guide and simplify placement of the insulation. Use the level to assure straight lines.

  • Peel the first few inches of the backing from the top of the insulation and press the insulation into place on the engine cover, using the pencil marks as a guide. Remove the rest of the backing and press firmly on the insulation to insure good adhesion to the surface of the engine cover. Continue this process until the inside of the engine cover is completely lined with insulation.

  • Tape all insulation seams and outer edges with reinforced foil tape.

Tips & Warnings

  • When applying the insulation, it is important to press firmly and allow the adhesive to make good contact. Take care not to stretch the insulation while applying. If stretched, the insulation may pull loose from the engine cover.

Related Searches


Promoted By Zergnet



You May Also Like

  • How to Soundproof Engine Noise

    Although exhaust noise is the single loudest part of engine noise, it is far from the only part. Fuel injectors clatter. Valves...

  • How to Wrap a Fuel Line

    An automobile or marine engine's rubber fuel line feeds gasoline from the gas tank into an engine's carburetor system. Before modern fuel...

  • How to Prevent a Fuel Vapor Lock

    Vapor lock can affect any kind of engine during normal operation where the outside ambient temperature remains high, or the fuel system...

  • How to Repair Electrical Wiring in an Engine Harness

    Automobile wire harnesses are usually subjected to extreme conditions. The harness is fastened to the engine and chassis, which subjects the harness...

  • How to Soundproof Inboard Boat Motors

    A boat equipped with an inboard motor may have more power and faster acceleration than an outboard-equipped vessel. The inboard may be...

  • Exhaust Wrap Benefits

    A vehicle's exhaust system is designed to quickly move exhaust gases (created through the combustion process) from the engine to the tail...

  • Foil-Backed Fiberglass Insulation Installation

    Foil-backed insulation products have gained popularity as homeowners experiment with passive solar techniques and the nation emphasizes energy conservation. Radiant barriers are...

Related Searches

Check It Out

How To Travel For Free With Reward Points

Is DIY in your DNA? Become part of our maker community.
Submit Your Work!