2 Pieces Black 694395 Primer Bulbs for Briggs and Stratton Lawn Mower Replacement for 496115 4180 5085H 5085K

What It Is

This is a set of two aftermarket primer bulbs designed to replace the OEM part on Briggs & Stratton engines. The primer bulb pushes fuel into the carburetor to help start cold engines, commonly found on walk-behind mowers, tractors, and pressure washers.

Fitment & Compatibility

Before buying, confirm your engine uses the OEM part numbers 694395, 496115, 4180, 5085H, or 5085K. These bulbs fit many Briggs & Stratton single-cylinder engines (e.g., 500e, 550e, 625e series) but not all—check your engine model and code stamped on the valve cover or blower housing. Measure the bulb diameter (typically ~1 inch) and stem length to match your carburetor. This is an aftermarket part, not OEM, so fit may vary slightly on older or non-standard carburetors. If your mower uses a different primer system (e.g., push-button or squeeze-bulb), this won’t work.

Key Things to Know

• Quality: Users report these bulbs are slightly stiffer than OEM, but they seal well and hold prime. A few note premature cracking after a season—inspect for dry rot if stored in direct sun.
• Installation: Easy—pop off the old bulb, push in the new one. No tools needed, but ensure the stem seats fully into the carburetor socket. A dab of silicone grease helps seal.
• Common gotcha: The stem may be too short or long for some carburetors, causing poor fit. Measure your old bulb’s stem length (typically ~0.5–0.75 inches) before ordering.
• Value: Two bulbs for ~$6.50 is cheaper than a single OEM part, but you get what you pay for—expect 1–2 seasons of use.

Should You Buy It

This is a good budget option if you have a common Briggs & Stratton engine and want a quick, low-cost fix for a hard-starting mower. It’s not for heavy-duty commercial use or for engines with unusual carburetors—stick with OEM if you need guaranteed long-term durability or a perfect fit.