Overview

The Attwood Marine 1364A1 is a deck-mount cowl vent for standard 3 inch ventilation hose. It can be set up as either an intake or an exhaust, so it works where you need passive airflow through an enclosed space rather than a powered blower.

This vent uses a flexible flange attachment that connects to the hose below deck, then accepts the vent head once the base is mounted. The vent body is die-cast ZAMAK with a chrome finish, and the flange is black plastic. For the installation shown in the instructions, the deck opening is 3-1/2 inches when a nylon wire tie is used as the hose clamp.

Key features

• Fits any standard 3 inch ventilation hose
• Can be used for either intake or exhaust airflow
• Die-cast ZAMAK vent head with chrome finish
• Black plastic flange attaches the hose below deck
• Flexible flange-and-head design allows the vent head to snap onto the mounted base
• Installation uses three #8 countersunk screws and a hose clamp or 15 inch nylon wire tie

Installation and fit

This is a straightforward replacement part when your boat already uses a 3 inch vent hose and a deck cowl in this style. The base is used as the drilling template, the hose slides up through the deck cutout and over the flange, and the vent head attaches after the base is fastened down. It is worth checking the deck opening before ordering, since the stated 3-1/2 inch hole size is tied to the clamp method used during installation.

Use on board

This vent suits refit work on boats that need passive deck ventilation through a hose-fed run below deck. It makes sense for owners replacing an older cowl vent on a sailboat, runabout, or classic fiberglass boat where the existing hose size and mounting style need to stay the same.