Quicksilver Primer Bulb for 5/16 in (8 mm) Fuel Line — Direct-Fit with 2 Hose Clamps, Low-Permeation Rubber

Quicksilver 8M0061875 is a replacement primer bulb designed for 5/16" (8 mm) inside-diameter fuel lines, supplied with two hose clamps for secure installation.

This primer bulb is a direct-fit replacement for Mercury and Quicksilver fuel systems that use 5/16" (8 mm) ID tubing. Built from multilayer low-permeation rubber, it’s engineered for marine environments where fuel handling, durability and resistance to vapor loss matter. While compatible with most fuels, the manufacturer does not recommend routine use with ethanol-blended fuels for marine engines; always consult your engine owner’s manual for correct fuel line and quick-disconnect fitting guidance.

How does this primer bulb improve starting and fuel delivery?

The bulb lets you manually draw fuel from the tank to the carburetor or fuel injection system, eliminating air pockets and reducing cranking time. Its pliant rubber wall compresses and expands reliably to create a positive flow path for fuel, helping priming to be quick and repeatable even after long storage or fuel line changes.

• Three-layer low-permeation rubber reduces vapor loss and protects fuel integrity.
• Designed to maintain suction and prevent air ingestion during priming.
• Compatible shape and flow rate for typical small outboard engines.

Will this part fit my boat’s fuel line and how easy is installation?

The 8M0061875 is sized specifically for 5/16" (8 mm) inside-diameter fuel hose and comes with two hose clamps to fasten connections. Installation is straightforward: cut the fuel line to length, insert the primer bulb in-line following flow direction, and tighten the supplied clamps to prevent leaks.

• Directly compatible with Mercury and Quicksilver 5/16" fuel lines.
• Includes two hose clamps for immediate, secure attachment.
• No special tools required beyond a screwdriver and a utility knife.

How durable is the Quicksilver primer bulb in marine conditions?

Constructed with three layers of low-permeation rubber, the bulb is designed for longevity and reduced fuel vapor transmission. It performs down to approximately 5°F (-15°C) and resists the flexing and abrasion common in outboard fuel systems used on boats and personal watercraft.

• Three-layer construction built for strength and extended service life.
• Low-permeation material helps limit fuel vapor loss over time.
• Functional at low operating temperatures for seasonal use or trailering.

Are there fuel compatibility or safety considerations I should know?

The primer bulb is formulated for conventional marine fuels and will function with many gasoline blends, but Quicksilver advises against routine use with ethanol-blended fuels in marine engines. Always follow your engine maker’s recommendations and inspect the bulb and clamps regularly for wear or leaks.

• Compatible with standard gasoline; ethanol blends are not recommended.
• Regular inspection prevents hardening, cracking or clamp loosening.
• Replace if fuel odor, swelling or visible damage appears.

Who is this for: This Quicksilver 8M0061875 primer bulb is aimed at boat owners, marine mechanics and powersports riders who need a reliable inline priming solution for engines using 5/16" (8 mm) fuel lines. It’s ideal for anyone seeking a genuine OEM-grade replacement part that matches Mercury/Quicksilver specifications, comes ready-to-install with hose clamps, and prioritizes durability and proper fuel delivery for outboards and small marine engines.