2 Packs 640259 36045A 36045 Primer Bulb for Fits Tecumseh LEV80 LEV90 LV148EA LV148XA Toro 20001 20003 20005 20007 20008 Lawn Mower

What It Is

This is a replacement primer bulb kit (2-pack) designed for small-engine lawn mowers, specifically those using Tecumseh LEV and LV series engines. It provides the manual fuel priming action needed to start cold engines.

Fitment & Compatibility

• Engine fitment: Tecumseh LEV80, LEV90, LV148EA, LV148XA (and similar LV/LEV models).
• Mower models: Toro 20001, 20003, 20005, 20007, 20008 (and other Toro mowers with these Tecumseh engines).
• OEM cross-reference: Replaces Toro part 640259, 36045A, and Tecumseh 36045.
• Physical check: Measure your old bulb’s diameter (typically 1 inch) and stem length. This bulb has a center stem that fits into the carburetor body.
• Not compatible with Briggs & Stratton, Honda, or Kawasaki engines—Tecumseh only.

Key Things to Know

• Quality: Aftermarket part; some users report slightly softer rubber than OEM, but it seals fine. Expect 1–2 seasons of normal use.
• Installation: Requires removing the air filter cover and carburetor shroud. No special tools—just a screwdriver. Push the stem in firmly until it seats; a dab of grease helps.
• Common gotcha: The bulb must sit flush against the carburetor. If it’s crooked or partially unseated, the mower won’t prime. Double-check the gasket underneath isn’t torn.
• Two-pack: You get a spare, which is handy since these bulbs dry out and crack over time.

Should You Buy It

If you own a Toro or other mower with a Tecumseh LEV/LV engine and your primer bulb is cracked, collapsed, or won’t hold primer, this is a cheap, quick fix. It’s not OEM, but it works reliably for the price. Skip it if you need a full carburetor rebuild or have a different engine brand.