lasuroa 2pcs 640259 Primer Bulb, Rubber Carburetor Primer Bulb Replacements Compatible with Tecumseh 36045A 36045 Lawn Mowing Machine Engine Parts

What It Is

This is a two-pack of rubber primer bulbs designed to replace the worn-out bulb on a small engine carburetor. It fits Tecumseh, Craftsman, and other lawn mowers that use the OEM 640259 or 36045A primer bulb.

Fitment & Compatibility

• OEM numbers: 640259, 36045A, 36045. Cross-check your engine’s model number with these.
• Brands that use this bulb: Tecumseh engines on Craftsman, Murray, MTD, and similar mowers. Not universal—verify your carburetor has a push-in primer bulb of this style.
• Measure before buying: Bulb diameter is roughly 1 inch, stem length about 0.6 inches. Measure your old bulb’s stem diameter and overall height to confirm.
• What to check: Look at the carburetor body—if the primer bulb pushes into a round hole with no retaining ring, this should fit. If your mower uses a screw-on or clip-on bulb, this will not work.

Key Things to Know

• Quality: Rubber feels pliable but not as thick as OEM Tecumseh bulbs. May last one to two seasons depending on sun exposure and fuel additives.
• Installation: Simple—pull out the old bulb, push in the new one. No tools required. Ensure the bulb seats fully and seals against the carburetor body.
• Common gotcha: If the primer bulb is hard or cracked, the carburetor gasket underneath may also be failing. Consider replacing the carburetor gasket kit at the same time.
• Two-pack value: You get a spare for the same price as one OEM bulb. Handy if you have multiple mowers or want a backup.

Should You Buy It

Buy this if you have a Tecumseh or compatible engine with a push-in primer bulb and want a cheap, easy fix for hard starting. It’s not a long-term OEM-grade solution, but for $7.59 and five minutes of work, it’s a solid budget choice for DIY mower owners. Skip it if you need a screw-on or clip-on bulb, or if your carburetor has other issues (clogged jets, bad gaskets).