694395 Primer Bulb for Lawn Mower 496115 4180 5085 5085H 5085K 2 Pack

What It Is

This is a replacement primer bulb (part #694395) for lawn mower engines, used to push fuel into the carburetor for easier cold starts. It comes as a 2-pack, typically for Craftsman, Husqvarna, or MTD models using compatible Tecumseh or Briggs & Stratton engines.

Fitment & Compatibility

Before buying, confirm your mower’s model number matches one of these: 496115, 4180, 5085, 5085H, or 5085K. Also check the primer bulb’s diameter—this one is about 1 inch across with a small center stem. It fits many side-valve engines but not all overhead valve (OHV) models. If your original bulb has a different shape or mounting hole size, measure yours and compare. This is an aftermarket part, not OEM, so it may feel slightly softer plastic—fine for most, but verify the stem length matches your carburetor’s recess.

Key Things to Know

• Installation difficulty: Easy—pop off the old bulb, push in the new one. No tools needed, but ensure the bulb seats fully and the retaining ring snaps tight.
• Quality: Users report it works well for the price, but some note the rubber feels thinner than OEM. Expect 1-2 seasons of use before cracking.
• Common gotcha: If your mower has a primer bulb under the air filter housing, you may need to remove the cover first. Also, a stuck carburetor float can make the bulb feel hard to push—don’t blame the bulb.
• 2-pack value: One spare is handy, but store it in a cool, dry place to prevent premature aging.

Should You Buy It

If your mower matches the listed models and you need a quick, cheap fix for a hard-starting engine, this 2-pack is a solid choice. It’s not premium OEM, but for $6.39, it’s a low-risk way to avoid a trip to the shop. Skip it if you have an oddball carburetor or want a long-term heavy-duty replacement.