Carburetor Primer Bulb For Briggs&Stratton Quantum 625 through 875 Series Engines 5085 5085H 5085K 5085K 694395 496115 (10)

What It Is

This is a replacement primer bulb for Briggs & Stratton Quantum 625 through 875 Series engines. It’s the small rubber button on the carburetor that you press to draw fuel into the carb before starting—used on walk-behind mowers, pressure washers, and other small engine equipment.

Fitment & Compatibility

Check your engine model number (stamped on the valve cover or blower housing). This bulb fits Quantum 625, 675, 725, 775, 800, 825, and 875 series engines. Direct OEM replacements include part numbers 5085, 5085H, 5085K, 694395, and 496115.
Measure the bulb’s stem diameter (common size is ~0.25 inches) and ensure the mounting hole on your carburetor matches. This is an aftermarket part, not genuine Briggs & Stratton, but dimensions are identical to OEM.
Does not fit older Briggs engines without a primer bulb (e.g., some classic or industrial series) or engines with a different stem diameter.

Key Things to Know

• Easy install – No tools needed. Just pull off the old bulb (may require gentle wiggling) and push the new one into the carburetor grommet. Takes under 2 minutes.
• Quality note – At $9.99, it’s a solid budget option. Some users report the rubber feels slightly stiffer than OEM, but it seals fine and lasts a season or two.
• Common gotcha – If the primer bulb doesn’t spring back, the grommet inside the carb might be cracked or missing. Check that before buying—replacing just the bulb won’t fix a failed grommet.
• Comes as a 10-pack – You get ten bulbs for the price of one OEM. Handy if you maintain multiple mowers or want spares, but overkill for a single repair.

Should You Buy It

Buy this if you need a cheap, functional replacement for a failed primer bulb on a Quantum series engine and don’t mind aftermarket quality. It’s ideal for DIYers on a budget or anyone maintaining multiple small engines. Skip it if you want genuine OEM for long-term durability or if your grommet is damaged—then you’ll need a full carburetor rebuild kit instead.