Attwood Marine Cowl Ventilator, 3 in ID Hose, Chrome-Plated ZAMAK

Overview

The Attwood Marine 1364A3 is a hull-mounted cowl ventilator for 3" I.D. wire-supported ventilation hose. It uses a chrome-plated die-cast Perma-Plate® ZAMAK cowl with a non-corrosive plastic hose flange, and the outer body measures 5-5/16" wide x 6" long x 2-1/4" high.

This vent can be used as either an intake or an exhaust point and meets ABYC H-2 cross-sectional area requirements. The neck extends 1" below deck, and the hose connection is arranged so the ducting twists into the bottom to form a raised water barrier, which is useful in compartments that need steady passive airflow without opening the hull to a straight water path.

It is a straightforward fit for boats already set up around 3" ventilation ducting, including bilge ventilation runs, enclosed lockers, and below-deck spaces where air needs to move without adding powered equipment at the vent itself.

Key features

• Fits 3" I.D. wire-supported ventilation hose
• Chrome-plated die-cast Perma-Plate® ZAMAK cowl with a non-corrosive plastic hose flange
• Flexible flange screws onto the hose and the vent snaps onto the flange
• Works for intake or exhaust ventilation and meets ABYC H-2 cross-sectional area requirements
• Outer dimensions are 5-5/16" x 6" x 2-1/4", with the neck extending 1" below deck
• Mounting cutout is 3-1/4" to 3-1/2" and the vent installs with #8 screws

Compatibility and fit

This model is sized for ventilation systems built around 3" hose, so the main fit check is the duct size and the available clearance behind the mounting surface. The 1" neck drop below deck matters in tight cavities, especially where the hose needs to turn immediately after the connection.

It suits refit work on runabouts, center consoles, small cruisers, and similar boats where a cowl vent is used to feed or extract air from an enclosed area. It also makes sense when the installation needs a finished metal look on the outside while keeping the hose interface in plastic at the back of the vent.

Installation and setup

The vent is built to fasten as a complete unit from either inside or outside the hull. For a clean install, check that the mounting surface can accept a 3-1/4" to 3-1/2" cutout and that there is enough room for the hose flange and duct run behind the panel.

Because the hose flange is separate from the cowl, the duct connection is easier to manage than one-piece vent bodies in cramped spaces. That layout is useful when working through an access hatch, inside a locker, or along the inside of a hull side where hand room is limited.

Materials and finish

The exposed cowl is chrome-plated die-cast ZAMAK, while the flange that carries the hose connection is plastic. This split construction keeps the visible side of the vent in metal and the hose connection in a material that does not discolor, which is a practical arrangement for boats that see frequent washdowns and regular service access.

• 1336549_qbp467615.pdf

Shipping
We ship worldwide from the United States. Rates are calculated at checkout based on destination and package weight. Some items include free shipping, which will show automatically. Not every product is eligible for international shipping; checkout will confirm eligibility. We do not ship to PO Boxes except through USPS, and not all packages qualify.

Processing and dispatch
Most orders are verified, packed, and handed to the carrier within 1 to 2 business days. Some products may need extra handling time or ship directly from the manufacturer. For certain international orders, inventory transfers between warehouses may add time. If any delay is expected, we will let you know the dispatch date.

Delivery and tracking
Deliveries are handled by trusted carriers such as USPS, UPS, FedEx, and DHL. Estimated arrival times appear at checkout and depend on your location and the service you choose. These are estimates and can be affected by customs or carrier disruptions. A shipping confirmation with a tracking link is emailed when your order ships, and tracking may take up to 24 hours to update. You can also view tracking in your account.

Duties, taxes, and support
International customers are responsible for any customs duties, taxes, and fees charged by the destination country. If these charges are refused and a shipment returns to us, the carrier’s return cost and any re-entry customs fees will be deducted from the refund. If your order is late or you need help, contact cs@qualityboatparts.com and we will assist you.

Quality Boat Parts is a reseller. Many items include a manufacturer’s warranty, and all warranty service is handled directly by the manufacturer. We do not manage or administer warranty claims on behalf of customers.

Warranty terms, coverage, and duration are set by each manufacturer. Issues involving defects, repairs, or replacements must be addressed with the manufacturer’s support team. When available, the warranty period is listed on the product page. If it is not shown, contact us or the manufacturer for details before purchasing.

To start a claim, the customer must contact the manufacturer and follow their process. Keep your proof of purchase and original packaging, and register the product if the manufacturer requires it, as these are often needed for warranty service.

We are happy to help you find the right contact or documentation, but we cannot decide outcomes or intervene in claim resolutions. For guidance, email cs@qualityboatparts.com.