Attwood Marine Fuel Primer Bulb, Low Permeation, EPA/CARB Certified

Overview

This Attwood Marine primer bulb is a low-permeation hand primer for outboard fuel lines, available for 1/4", 5/16", and 3/8" inner diameter hose setups. It is used in the fuel line between a portable tank or onboard fuel supply and the engine, helping pull fuel through the line before starting.

The bulb uses a three-layer construction that resists collapse under vacuum and helps prevent ballooning or bursting under pressure. Its low-permeation material reduces fuel evaporation, while high-efficiency check valves support faster priming with low fuel restriction, including less than 1 kPa restriction at 50 liters per hour.

This is a practical replacement or rigging part for small outboards, tenders, fishing boats, and other gasoline-powered marine setups where the fuel line size needs to match the engine and tank connections. The bulb is compatible with ethanol-blended fuels and is EPA and CARB certified.

Key features

• Low-permeation bulb helps reduce fuel evaporation in portable and outboard fuel systems.
• Three-layer construction resists vacuum collapse and pressure-related ballooning.
• High-efficiency check valves help the line prime quickly with fewer hand pumps.
• Low fuel restriction, rated at less than 1 kPa at 50 liters per hour.
• Works with ethanol-blended fuels used in many marine gasoline systems.
• Operating temperature range of 18°F to 122°F supports typical seasonal boating conditions.
• EPA and CARB certified for compliant fuel-system service.
• Available in 1/4", 5/16", and 3/8" hose inner diameter versions for common outboard fuel line sizes.

Variants

This primer bulb range is offered in multiple hose inner diameter configurations so the fuel line connection can match the existing hose on the boat or engine rig.

The hose size is the key difference between the variants. The priming construction, low-permeation purpose, ethanol compatibility, and EPA and CARB certification are consistent across the listed versions.

• 93014LP7: 1/4" inner diameter hose. This size fits fuel line systems that use 1/4" ID hose, often found on smaller outboard and portable fuel setups.
• 93038LP7: 3/8" inner diameter hose. This version is for fuel systems using 3/8" ID hose where a larger fuel line is already part of the rigging.
• 93516LP7: 5/16" inner diameter hose. This size suits installations built around 5/16" ID fuel hose, a common middle size for many outboard applications.

Installation and fit

Match the variant to the inner diameter of the existing marine fuel hose, not the outside diameter. A primer bulb that does not match the hose size can be hard to seal and may create fuel delivery problems, especially when the line is under suction from the engine fuel pump.

Install the bulb in the correct fuel-flow direction, with the arrow or flow marking pointing toward the engine. It should be placed where it can be reached by hand, away from sharp bends, engine heat, and areas where gear or feet can press against the fuel line.

Use on board

This primer bulb is a good match for boaters replacing an old, stiff, or slow-priming bulb in an outboard fuel line. It is also useful when rigging a new portable fuel tank hose assembly for a dinghy, skiff, jon boat, center console, or fishing boat.

For best results, inspect the full fuel line at the same time, including hose condition, clamps, connectors, and tank fittings. A fresh primer bulb can only work properly when the rest of the fuel path is clean, sealed, and sized correctly.

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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