1. Product Overview
The JRL 10mm (3/8 inch) Fuel Line Hand Primer Bulb is a universal component designed for low-pressure fuel systems. It facilitates the introduction of fuel into the fuel pump after maintenance, such as changing a fuel filter, or for extracting fuel from a tank. This primer bulb is suitable for use with carbureted engines in various applications including cars, boats, and motorcycles.
The package includes one black rubber fuel primer bulb.
Image 1: The JRL 10mm (3/8 inch) Fuel Line Hand Primer Bulb, a black rubber bulb with metal hose connectors at each end.
2. Key Features
- Unidirectional Flow: The bulb features an internal check valve system that ensures fuel flows in one direction, preventing backflow.
- Flow Direction Indicator: An arrow marking on the bulb's surface clearly indicates the correct fuel flow direction for easy installation.
- Durable Connectors: Equipped with metal hose connectors designed for secure and leak-free connections to fuel lines.
- Versatile Compatibility: Compatible with 10mm (3/8 inch) and 11mm fuel lines.
- Broad Application: Suitable for gasoline, diesel, and water (non-potable, non-salt, non-chemical) in low-pressure fuel systems for automotive, marine, and motorcycle uses.
Image 2: Close-up view of the primer bulb showing the directional arrow for fuel flow and the robust metal spring-reinforced hose connector.
Image 3: Visual guide indicating compatibility with Gasoline, Diesel, and Water, while explicitly showing incompatibility with drinking water, salt water, and chemical liquids.
3. Setup and Installation
- Prepare Fuel Lines: Ensure the fuel lines are clean and free of debris. The primer bulb is designed for 10mm (3/8 inch) or 11mm inner diameter fuel hoses.
- Identify Flow Direction: Locate the arrow on the surface of the primer bulb. This arrow indicates the direction of fuel flow.
- Connect Hoses: Connect the fuel line from the fuel tank or source to the inlet side of the primer bulb (opposite the arrow direction). Connect the fuel line leading to the engine or fuel pump to the outlet side of the primer bulb (in the direction of the arrow).
- Secure Connections: Use appropriate hose clamps (not included) to secure the fuel lines to the metal connectors on the primer bulb. Ensure all connections are tight and leak-free to prevent fuel spills and air ingress.
Image 4: Diagram illustrating the overall length of 150mm and the 10mm (3/8 inch) interface size of the primer bulb.
4. Operating Instructions
The primer bulb is used to manually draw fuel through the fuel lines and into the carburetor or fuel pump, effectively priming the fuel system.
- Squeeze and Release: Repeatedly squeeze the rubber bulb firmly and allow it to fully reinflate between squeezes.
- Observe Fuel Flow: Continue squeezing until the bulb feels firm, indicating that fuel has filled the lines and the system is primed. You may observe fuel flowing through transparent fuel lines if present.
- Engine Start: Once the system is primed, proceed with starting your engine according to its manufacturer's instructions.
This process is particularly useful after running out of fuel, replacing fuel filters, or during initial setup of a fuel system to remove air pockets.
Image 5: A hand demonstrating the squeezing action on the primer bulb, illustrating its use as a siphon pump.
5. Maintenance
The JRL Fuel Line Hand Primer Bulb is designed for durability, but regular inspection is recommended to ensure optimal performance and safety.
- Visual Inspection: Periodically inspect the rubber bulb for any signs of cracking, hardening, or deterioration, especially after prolonged exposure to fuel or extreme temperatures.
- Check Connections: Ensure that all hose connections remain tight and free of leaks.
- Replacement: If the bulb becomes stiff, cracked, or loses its ability to draw fuel effectively, it should be replaced immediately to prevent fuel system issues or leaks.
6. Troubleshooting
If the primer bulb is not functioning as expected, consider the following:
- No Fuel Flow:
- Verify the primer bulb is installed with the arrow pointing in the correct direction of fuel flow towards the engine.
- Check all hose connections for air leaks. Air entering the system will prevent proper priming.
- Ensure there is sufficient fuel in the tank.
- Inspect fuel lines for kinks or blockages.
- Bulb Does Not Firm Up:
- This often indicates an air leak in the fuel line system or a faulty check valve within the primer bulb. Re-check all connections.
- If the bulb itself is old or damaged, its internal check valve may fail, requiring replacement.
- Fuel Leakage:
- Immediately address any fuel leaks. Tighten hose clamps or replace damaged fuel lines or the primer bulb if it is the source of the leak.
7. Specifications
| Brand | JRL |
| Model Number | 9001080A (Manufacturer Part Number: AM-MA0196) |
| Interface Size | 10mm (3/8 inch) |
| Input/Output Compatibility | 10mm and 11mm fuel lines |
| Overall Length | 150mm (approximately 5.9 inches) |
| Material | Rubber (bulb) |
| Compatible Liquids | Gasoline, Diesel, Water (non-potable, non-salt, non-chemical) |
| Item Weight | 2.79 ounces |
| Package Dimensions | 3.98 x 1.77 x 1.54 inches |
Image 6: Examples of common applications for the fuel primer bulb, including boats, cars, and motorcycles.
8. Safety Information
When working with fuel systems, always prioritize safety to prevent accidents and injuries.
- Ventilation: Work in a well-ventilated area to avoid inhaling fuel fumes.
- Ignition Sources: Keep away from open flames, sparks, and other ignition sources. Do not smoke while handling fuel.
- Personal Protective Equipment: Wear appropriate safety glasses and gloves to protect against fuel contact.
- Spill Prevention: Have absorbent materials readily available to clean up any fuel spills immediately.
- Disposal: Dispose of any waste fuel or contaminated materials according to local environmental regulations.
