（2 Packs） 640259 Primer Bulb Compatible with Tecumseh VLV60 VLV65 VLV66 VLX50 VLX55 TVS90 VLV126 VLV40 VLV50 VLV55 Engine TC-36045A 36045 36045A Lawn Mower with Ring

What It Is

This is a 2-pack of replacement primer bulbs (part #640259) designed to fit specific Tecumseh small engines commonly used on walk-behind lawn mowers, snow blowers, and other outdoor power equipment. The bulb pushes air into the carburetor to prime the engine before starting.

Fitment & Compatibility

Check these before buying:

• Engine models: Fits Tecumseh VLV40, VLV50, VLV55, VLV60, VLV65, VLV66, VLX50, VLX55, TVS90, and VLV126 engines.
• OEM cross-reference: Replaces Tecumseh part numbers TC-36045A, 36045, and 36045A.
• Physical check: Measure your old primer bulb diameter (this one includes a retaining ring). Ensure the carburetor mounting hole matches the bulb stem size—typically 5/16” to 3/8”.
• Brand/deck: Not specific to any mower deck brand—only engine compatibility matters. If your engine model isn’t listed, measure and compare.

Key Things to Know

• Quality: Aftermarket part; may feel slightly different rubber compound than OEM but works identically for priming. Two-pack gives you a spare.
• Installation: Simple—remove old bulb, push new one into the carburetor hole, and snap the retaining ring over it. No tools needed.
• Common gotcha: If the bulb doesn’t snap in tightly or feels loose, the ring may not be seated correctly. Check for cracks in the carburetor housing.
• Life expectancy: Aftermarket bulbs can last 1-3 seasons; UV and fuel vapors cause hardening over time.

Should You Buy It

Buy this if you need a low-cost, functional replacement for a worn or cracked primer bulb on a listed Tecumseh engine and don’t mind an aftermarket part. It’s a solid value for the price, especially with the spare. Skip it if you require OEM parts for commercial use or if your engine model isn’t on the list—fitment isn’t guaranteed outside those.