Mercury – Primer Bulb | Fuel System Component | Black Rubber | 8M0052976

Overview

If you’ve spent any time around outboards, you know how good it feels when the engine fires up on the first try. That little moment of relief—when the motor catches cleanly and you can ease away from the dock—often comes down to simple, dependable parts doing their job. The Mercury 8M0052976 Primer Bulb is one of those quiet heroes. With every squeeze, it sends fuel forward with a steady pulse, giving your engine the pressure it needs to start smoothly without the drama. It’s a small piece of gear, but when you’re miles from home, it becomes one of the parts you trust most.

Key Features

• Designed for 1/4 inch (6.35 mm) inside diameter Mercury or Quicksilver fuel lines
• Includes primer bulb and two hose clamps for a complete installation
• Built with a three-layer low-permeation rubber body for long-lasting durability
• EPA-MERC-PB15 compliant for modern fuel system standards
• Compatible with ethanol-blended fuels, though non-ethanol fuel is recommended for marine engines
• Part number 8M0052976

Engine & Boat Compatibility

• Made for Mercury and Quicksilver portable and mid-range outboards using 1/4 inch fuel lines
• Works well with aluminum fishing boats, inflatables, dinghies, jon boats, and tiller-steer setups
• Fits both two-stroke and four-stroke systems when paired with the correct connectors
• Can be used with select other brands as long as the fuel line size and fittings match

Performance & Practical Benefits

A good primer bulb should feel right in your hand—firm but flexible, never mushy, and never stiff when the temperature drops. This Mercury bulb delivers a tight, smooth squeeze every time, giving you a steady flow of fuel so you can get your engine primed quickly. The internal check valves hold pressure reliably, which means no extra pumping, no fighting a collapsing bulb, and no guessing whether fuel actually made it to the engine.

Its triple-layer rubber construction resists drying, cracking, and fuel permeation, something cheaper bulbs often struggle with. That durability shows up season after season, whether you’re fishing at dawn, running supplies across the lake, or simply cruising with the family. The included clamps lock everything down securely, helping prevent fumes, leaks, or air being pulled into the line.

Why Buy OEM

When you’re choosing parts for your fuel system, shortcuts usually come back to haunt you. An aftermarket primer bulb may look similar, but the rubber composition, check valve precision, and long-term reliability often aren’t the same. A genuine Mercury Marine part is engineered to work seamlessly with Mercury fuel systems, giving you consistent performance and a longer service life. It’s one of those smart, real-world decisions seasoned boaters make—spend a little more now, avoid a headache later, and keep your engine starting strong.

FAQ

Q1: Which engines does the Mercury 8M0052976 Primer Bulb fit?

Any Mercury or Quicksilver fuel system using a 1/4 inch inside diameter fuel line.

Q2: How is it different from aftermarket options?

It uses higher-quality rubber, tighter valve tolerances, and meets Mercury’s engineering standards for fuel delivery and sealing.

Q3: How do I confirm it’s the right part?

Check your fuel line size—if it’s 1/4 inch ID, this is the correct Mercury Marine part.

Q4: Can it be used in saltwater and freshwater?

Yes. It works equally well in both environments. Just keep all fuel components above the waterline.

Q5: Is installation simple?

Very. Slide it into your fuel line, tighten the clamps, align the arrow with fuel flow, and you’re ready to prime.