Description
Product Overview
The JLM Marine 5/16 Primer Bulb is engineered for marine outboard fuel systems, featuring a robust rubber body that resists oil, fuel, and the harsh effects of saltwater exposure. Sized at 8 mm (0.315 in) outside diameter, it matches the standard 5/16″ fuel line specifications and includes a clear directional arrow for correct installation. The bulb’s lightweight design (0.14 kg) and compact dimensions (7.17 × 4.06 × 2.05 in) make it easy to store and handle. ![[Product front view showing all components]](https://www.innovmart.store/wp-content/uploads/2026/06/6c7c51ffcea044bd86100976afbd1190.jpg)
Usage
Designed for marine environments, this primer bulb is perfect for small to medium outboard engines used in fishing boats, recreational vessels, and workboats. It quickly primes the fuel line, eliminating air pockets and ensuring a smooth start even after periods of inactivity. Install the bulb following the arrow direction, connect to the fuel line, and you’ll have reliable fuel flow for every launch.
Why Choose Us
JLM Marine combines decades of marine parts expertise with rigorous quality testing. Each primer bulb undergoes pressure and leak testing to meet OEM standards, guaranteeing performance that matches or exceeds original equipment. Our commitment to marine‑grade materials means the bulb remains flexible in cold water and resists cracking under UV exposure, giving you confidence on every outing.
Key Features
- Premium rubber construction provides oil and aging resistance for long‑term durability
- 8 mm (5/16″) size fits standard marine fuel lines for universal compatibility
- Clear directional arrow ensures correct installation and optimal fuel flow
- Lightweight and compact design simplifies storage and handling on board
- Backed by JLM Marine’s warranty and responsive customer support for peace of mind
FAQ
How do I install the primer bulb?
Align the arrow on the bulb with the direction of fuel flow, cut the fuel line to the appropriate length, insert the bulb, and secure with hose clamps. No special tools are required.
Is this bulb compatible with all outboard engines?
The 5/16″ (8 mm) size is standard for most small to medium outboard engines. Verify your engine’s fuel line size before purchase.
Can the bulb be used in saltwater environments?
Yes, the rubber material is formulated to resist saltwater corrosion, UV exposure, and fuel chemicals, making it ideal for marine use.
What is the warranty period?
JLM Marine offers a one‑year limited warranty covering manufacturing defects.
Do I need any additional components?
The package includes one primer bulb only; you will need hose clamps and the appropriate fuel line to complete the installation.
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