Skip to product information
1 of 5

Marine Outboard Fuel Primer Bulb 8mm 5/16" Hose 45mm Boat Petrol Diesel Engine

Marine Outboard Fuel Primer Bulb 8mm 5/16" Hose 45mm Boat Petrol Diesel Engine

Regular price £7.99
Regular price Sale price £7.99
Sale Sold out
In stock, ready to ship
Quantity

Fuel Primer Bulb 45mm (8mm/5/16" Hose)

Heavy-Duty Marine Fuel Line Primer

This premium manual inline fuel primer bulb is designed for outboard and inboard marine engines. Featuring a large 45mm diameter bulb, it allows for quick and efficient fuel delivery to the engine, even after long periods of inactivity. It is specifically engineered to fit standard 8mm (5/16") internal diameter fuel hoses, providing a secure, leak-free connection when used with appropriate clamps.

RELIABILITY: Manufactured from marine-grade rubber that resists cracking, hardening, and UV degradation. Equipped with a built-in non-return valve to prevent fuel backflow.

Key Features

  • Dual Check Valves: Prevents fuel backflow for faster starts.
  • Directional Arrow: Molded-in indicator for correct installation.
  • High Capacity: 45mm bulb ensures rapid priming with fewer pumps.
  • Fuel Resistance: Suitable for Petrol, Diesel, and E10 Ethanol blends.

Technical Specs

Bulb Diameter 45 mm (1.77 in)
Hose Bore Fit 8 mm (5/16 in)
Total Length Approx. 150 mm (5.9 in)
Material High-Grade Rubber
Valve Type One-Way Non-Return

Compatibility / Fitment Guide

Make/System Model/Application Notes
Universal 8mm (5/16") ID Fuel Lines Most common marine fuel systems
Yamaha Outboard External Lines Replacement for 8mm OEM bulbs
Mercury / Quicksilver Standard Outboards Compatible with 5/16" hoses
Suzuki / Honda / Hidea Small to Mid-Size Engines Universal inline fit

OEM Cross Reference

Yamaha OEM 6YK-24360-73-00, 6YK-24360-72-00
Mercury OEM 8M0061875, 8M0061876
Johnson / OMC 5008605, 5008579
Sierra 18-8004EP-1, 18-8005EP

Questions & Answers

Is this a genuine original part?

This is a premium quality aftermarket replacement part, manufactured to meet or exceed original equipment (OE) standards for fitment and performance.

How do I know if it is compatible?

If your current fuel line has an internal diameter of 8mm (5/16 inch), this bulb will fit perfectly. We recommend using stainless steel hose clamps for a safe installation.

Can this be used with modern E10 fuel?

Yes, this bulb is constructed from specialized rubber compounds designed to resist the corrosive effects of ethanol-blended fuels such as E10 and E15.

Note: Please verify your fuel hose internal diameter before ordering. For 10mm (3/8") or 6mm (1/4") lines, please see our other listings at 4boats.co.uk.

4

4Boats

Verified Seller on Bidnamic Store
View all products by 4Boats

Free Shipping

Shipping Overview:

  • Daily Cut-Off: Orders placed before 16:00 GMT are prepared the same working day
  • Preparation Time: 0–1 working days (Monday to Friday)
  • Delivery Window: 5–10 working days after dispatch (Monday to Friday)
  • UK Delivery: Free shipping is provided on all orders within the United Kingdom

For more information, click here

30-Days Return

Essential Details:

  • Return Window: 30 days from the date of delivery
  • Restocking Fees: None
  • Refund Timeline: Usually within 7 business days
  • Return Shipping: Customers cover the cost of sending items back

For more information, click here

View full details