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

What It Is

This is a set of two black primer bulbs designed to replace the purge/prime bulb on small engines, commonly used on lawn mowers, snow blowers, and generators. The 694395 bulb is a standard push-in replacement for engines that use a rubber bulb to manually prime the carburetor before starting.

Fitment & Compatibility

Before buying, verify your machine uses a push-in style primer bulb (not a screw-in or barbed type). Measure the existing bulb’s diameter and depth—this 694395 replacement fits many Briggs & Stratton, Tecumseh, and generic engines that accept the OEM numbers 496115, 4180, 5085H, and 5085K. Check that the bulb’s stem length matches your carburetor recess; too short or too long can cause air leaks. It will not fit all mowers—confirm your model’s primer bulb type by cross-referencing your old part number or the mower’s engine brand/model. This is an aftermarket part, not OEM, so tolerances may vary slightly.

Key Things to Know

• Quality variance: At this price point, the rubber may feel stiffer or softer than OEM. Some users report premature cracking after a season of use. Inspect for thin spots before installation.
• Installation is simple: No tools needed—just pop the old bulb out (use a small flathead to pry gently) and press the new one in until it seats flush. Ensure the retaining ring or clip is present and undamaged.
• Common gotcha: If the bulb doesn’t snap in securely or feels loose, the carburetor’s primer well may be worn. In that case, a new bulb won’t fix the air leak—you may need a carburetor replacement.
• Check for debris: Old bulbs often crumble inside the carburetor. Remove any rubber fragments before installing the new bulb to avoid clogging the primer circuit.

Should You Buy It

This is a budget-friendly fix if you’re confident in the fitment and your carburetor’s primer well is in good shape. It’s fine for a quick repair on an older mower or a backup machine, but if you need long-term reliability or have a high-use commercial mower, consider spending more for an OEM bulb.