The SIERRA Premium 3/8″ Marine Fuel Line Primer Bulb is a dependable fuel primer bulb designed to help prime marine fuel systems quickly before engine start-up. It is commonly used in outboard engine fuel lines where manual priming is required to move fuel from the tank to the engine after maintenance, extended storage, or when the fuel system has been drained. Featuring a 3/8″ (9.5 mm) hose connection, this boat primer bulb is suitable for fuel systems that use the same fuel line size. The product is supplied as Part Number 18-8005S in a single blister pack, making it convenient for individual replacement or routine marine maintenance.

Built for marine environments, this primer bulb is manufactured using materials that are resistant to alcohol, UV exposure, and ozone, helping it withstand common conditions encountered on boats and marine vessels. The bulb incorporates dual internal check valves that assist in creating efficient fuel flow while reducing the effort required during manual priming. This design helps transfer fuel more quickly through the fuel line, making engine preparation more convenient before starting. Whether replacing a worn primer bulb or servicing a fuel system, this component provides a practical solution for maintaining reliable fuel delivery.

A properly functioning outboard primer bulb is an essential part of many portable and permanent marine fuel systems. By allowing fuel to be manually drawn through the fuel line, it helps remove air from the system and delivers fuel to the engine before ignition. This can be particularly useful after replacing fuel filters, servicing fuel lines, or preparing an engine that has been unused for an extended period. Because the bulb is designed for 3/8″ (9.5 mm) fuel hoses, it is suitable for many boats equipped with compatible fuel line assemblies used with outboard motors and selected marine applications.

The SIERRA Premium 3/8″ Marine Fuel Line Primer Bulb is also suitable for buyers looking for a durable replacement primer bulb for small engines that use compatible fuel line sizes. Its alcohol-resistant construction makes it suitable for fuels containing ethanol blends commonly found in many regions, while UV and ozone resistance help protect the bulb from weather-related deterioration during regular outdoor use. The dual check valve design promotes consistent fuel movement during priming without introducing unnecessary complexity to the fuel system.

For routine boat maintenance, replacing an aging fuel primer bulb before it becomes cracked, hardened, or difficult to operate helps maintain smooth fuel delivery. Marine technicians and boat owners often inspect primer bulbs as part of seasonal servicing because exposure to sunlight, fuel, and changing temperatures can gradually affect rubber components over time. Installing a compatible replacement helps maintain efficient fuel transfer and supports normal engine starting procedures when manual priming is required.

This boat primer bulb is designed specifically for manual fuel priming and should always be installed according to the engine or fuel system manufacturer’s recommendations. Selecting the correct hose diameter is important to ensure proper fitment and fuel flow. Since this model is manufactured for 3/8-inch (9.5 mm) fuel lines, users should verify their existing hose size before installation. The compact design also allows it to fit easily within many marine fuel line assemblies without requiring significant modifications.

Whether used on recreational boats, fishing boats, utility vessels, or other marine applications with compatible fuel systems, the SIERRA Premium 3/8″ Marine Fuel Line Primer Bulb provides a practical replacement component for maintaining manual fuel priming capability. Its combination of alcohol, UV, and ozone resistance together with dual check valves makes it suitable for regular marine use while supporting efficient fuel transfer before engine operation. Boat owners, marine workshops, and service professionals can keep this replacement primer bulb available as part of routine fuel system maintenance and repairs.

Key Features:

• SIERRA Premium 3/8″ Marine Fuel Line Primer Bulb provides reliable manual fuel priming for compatible 3/8″ (9.5 mm) marine fuel line systems.
• Fits 3/8″ (9.5 mm) fuel hoses.
• Part Number: 18-8005S.
• Supplied in a single blister pack.
• Resistant to alcohol, UV, and ozone.
• Equipped with dual check valves for quick priming and improved fuel flow.
• Suitable as a replacement fuel primer bulb, boat primer bulb, or outboard primer bulb.
• Helps move fuel through the fuel line before engine start-up.
• Supports routine maintenance and replacement of worn or aged primer bulbs.
• Compact design for installation in compatible marine fuel line assemblies.

Applications / Suitable For:

• SIERRA Premium 3/8″ Marine Fuel Line Primer Bulb is suitable for marine fuel systems that use 3/8″ (9.5 mm) fuel hoses.
• Outboard engine fuel line assemblies requiring manual fuel priming.
• Recreational boats.
• Fishing boats.
• Utility and work boats.
• Replacement of worn or damaged fuel primer bulbs.
• Seasonal boat maintenance and fuel system servicing.
• Compatible primer bulbs for small engines using matching 3/8″ (9.5 mm) fuel lines.

FAQs:

Q: What hose size is this primer bulb designed for?
A: It is designed for 3/8″ (9.5 mm) fuel hoses.

Q: Does this primer bulb include check valves?
A: Yes. It features dual check valves for quick priming and improved fuel flow.

Q: Is this primer bulb resistant to ethanol-containing fuel?
A: The bulb is resistant to alcohol, as well as UV and ozone, according to the manufacturer.

Q: What is included in the package?
A: This product is supplied as SIERRA Part Number 18-8005S in a single blister pack.