Attwood Marine Turbo 4000 Series II In-Line Blower, 12V, 4 in Vent Hose

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.

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

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Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

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Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

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