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SKU:
NLT1I00701
Ships for free in 2–4 business days.
3/8-Inch Marine Fuel Line Hand Primer Bulb for Boat Outboard
$22.99
In Stock
$22.99
Sale price
$22.99
Regular price
This new universal 3/8-inch hand primer bulb is made for compatible marine and small-engine fuel lines using the same hose size and fuel type.
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Product Overview
An outboard that starts only after repeated squeezing, loses prime after sitting, or has a cracked hard bulb may have an air leak or failed check valve in the fuel-line assembly. Replacing the bulb can restore manual priming when the tank vent, pickup, hose, connectors, filter, and fuel pump are otherwise sound.
Primer bulbs are directional and must be compatible with the hose, clamps, fuel blend, and engine demand. This is not a cure for every fuel-starvation problem. Match 3/8-inch hose size, arrow direction, nipple style, material rating, and placement.
Key Features & Performance
- 3/8-inch hose-barb primer bulb
- Built-in one-way valves for manual fuel priming
- Universal replacement for matching low-pressure fuel lines
- Suitable for custom marine or small-engine line service when specifications match
Common Uses
- Replacing a bulb that stays collapsed or will not become firm
- Repairing cracked fuel-line rubber that draws air
- Building a correctly rated portable-tank fuel line
Technical Specifications
- Product Type: Hand primer fuel bulb
- Hose Size: 3/8 inch inside-diameter line
- Flow Direction: Follow molded arrow
- Fuel Compatibility: Verify for the fuel blend and application
- Fitment: Universal custom installation
Installation & Fitment
- Work away from sparks, flames, and hot surfaces
- Confirm hose size and fuel compatibility
- Install with the flow arrow pointing toward the engine
- Use fuel-rated clamps without cutting the hose
- Prime and inspect every joint for seepage or air entry
Compatibility Notice
This is a universal or service item, not a guaranteed fit for every vehicle, machine, or job. Measure and compare all dimensions, connections, operating limits, and the intended system before purchase. Custom installation or professional setup may be required.
Frequently Asked Questions
Q: Why will the bulb not get hard? A: Air leaks, an open tank vent problem, failed check valves, empty pickup, or downstream fuel leak can prevent priming.
Q: Can I install it backward? A: No. The one-way valves require the arrow to point in the direction of fuel flow.
Q: Will it fit every outboard? A: No. Confirm the engine's recommended hose diameter, fuel demand, connectors, and material requirements.
Q: Is this an original-equipment part? A: No. This is a new aftermarket product. Brand names and part numbers are used only to identify compatible applications.
Part Summary
keywords: 3/8 marine primer bulb, outboard fuel line hand pump, boat fuel bulb replacement, fuel line loses prime, universal marine gas primer
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, specifications, and application before purchase.