Sierra 8004EP1 Primer Bulb, 5/16"
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Sierra 8004EP1 primer bulb for 5/16" fuel hose—designed for low permeation and dependable one-way fuel flow with check valves.
Key Features
- Meets 2011 EPA regulations for low fuel permeation with the look and feel of previous bulbs
- Superior resistance to UV, ozone, and alcohol-enhanced fuel
- Check valves feature stainless spring and Viton balls to help resist sticking and support reliable priming
Intended Use
- Marine fuel systems that use a 5/16" fuel primer bulb on the suction/prime side
- Carbureted or fuel-supply applications requiring manual priming via a primer bulb with check valves
Product Details
- Sierra primer bulb (8004EP1)
- For 5/16" fuel hose
- Includes check valves with stainless spring and Viton balls
- SKU: 47-8004EP1
Parts Desk Insights
Best Use Case: A solid choice for replacing a worn or hard primer bulb where you want consistent, one-way priming performance and improved resistance to modern fuel conditions.
Common Issues: If the bulb feels weak or won’t hold prime, inspect the primer bulb check-valve action and the hose/barb connections for leaks, and replace any related gaskets or clamps as needed during service.
Related Products & Accessories
- Related Products & Accessories - Browse fuel lines and hoses for clamps, fittings, and hose that may be needed alongside a 5/16" primer bulb.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.