Attwood Marine Turbo 4000 Series II In-Line Blower, 12V, 4 in Vent Hose
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Overview
The Attwood Marine Turbo 4000 Series II is a 12V in-line bilge blower for moving air through boat ventilation ducting in engine compartments, bilges, galleys, and heads. This 4 inch blower fits 4 inch I.D. ventilation hose and uses an in-line housing that can be mounted vertically or horizontally where space is limited.
It uses a five-blade fan and a reworked housing that helps reduce distortion during installation, which matters in tight bilge and engine-room spaces where hose clamps and fasteners can put stress on the body. The blower is built for low current draw, with published specifications listing 12V operation and about 2.5 amps for the standard 1747-4 version.
Key features
- 12V in-line blower for boat bilge and compartment ventilation systems.
- 4 inch hose size for use with 4 inch I.D. marine ventilation ducting.
- Five-blade fan helps move air efficiently through short ventilation runs.
- Built-in mounting feet support vertical or horizontal installation in confined spaces.
- Tabs at the intake and exhaust help keep the hose and clamp seated during installation.
- Nickel-plated motor can helps resist corrosion inside the blower assembly.
- Stiffening ribs help the housing hold its shape when fastened in place.
- 16-gauge tinned and caulked copper wire leads support marine electrical installation.
- CE certified for use in marine ventilation applications.
Variants
This Turbo 4000 Series II blower is offered in two configurations that keep the same general 12V, 4 inch in-line format while changing the water-resistant option.
The main difference between the two versions is whether the blower includes water-resistant construction. The installation style, white housing, and 4 inch ventilation hose fitment remain consistent across the range.
- 1747-4: Water-resistant: No. This is the standard configuration for protected ventilation runs where the blower is not expected to see regular moisture exposure.
- 1749-4: Water-resistant: Yes. This version adds water-resistant protection for installations where incidental moisture is more likely around the blower location.
Installation and setup
The in-line body is suited to installations where air needs to be pulled through ducting rather than from a surface-mounted vent. Built-in feet let the blower sit securely on a bulkhead, stringer, or other suitable mounting surface, and the vertical or horizontal mounting option gives installers more freedom in cramped bilges and machinery spaces.
Use properly sized 4 inch ventilation hose and secure the hose at both ends of the blower. The intake and exhaust tabs help hold the hose and clamp in position, which is useful when working in areas with vibration, heat, and limited access.
Electrical and onboard use
This is a 12V blower, so it belongs on a 12V DC circuit with wiring, switching, and circuit protection sized for the vessel installation. It is commonly used to help clear fumes and stale air from engine compartments and bilge areas before starting the engine, as well as to improve air movement in enclosed utility spaces such as heads and galleys.
It is a practical match for small to mid-size powerboats, refits, and OEM-style replacement jobs where the boat already uses 4 inch ventilation ducting and an in-line blower layout.
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.
