HIPA (Pack of 5) 640259 Primer Bulb for Tecumseh Engine LEV100 LEV105 LEV115 LEV120 LEV121 OVRM105 OVRM120 Lawn Mower

What It Is

This is a pack of five replacement primer bulbs (OEM-style 640259) for Tecumseh engines found on many walk-behind lawn mowers. The primer bulb sits on the carburetor and is pressed to push fuel into the engine for cold starts.

Fitment & Compatibility

Before buying, verify your engine model number—this fits Tecumseh LEV100, LEV105, LEV115, LEV120, LEV121, OVRM105, and OVRM120 engines. Check the carburetor body shape: the bulb is round, about 0.75 inches in diameter, with a small stem that pushes into the carburetor. It replaces OEM part 640259. Not for Briggs & Stratton, Honda, or other brands. Measure your old bulb’s stem length (roughly 0.3 inches) and diameter to confirm match—some aftermarket bulbs are slightly off.

Key Things to Know

• Quality: HIPA bulbs are rubber, not silicone—they’re durable but may harden slightly faster than OEM over time. The pack of five gives you spares.
• Installation: Easy—pop off the old bulb with a flathead screwdriver (pry gently), then press the new one in until seated. No tools needed.
• Common gotcha: If the primer bulb doesn’t collapse when pressed, the carburetor’s check valve or fuel line might be clogged—replacing the bulb alone won’t fix that.
• Fitment nuance: Some later Tecumseh carbs use a slightly different stem. If your old bulb has a metal retainer ring, this pack doesn’t include one—reuse your original.

Should You Buy It

If you own a Tecumseh-powered mower with a hardened or cracked primer bulb, this is a cheap, reliable fix. The five-pack is smart for multiple mowers or future failures. Skip it if your engine model isn’t listed or if the carburetor has deeper issues—this only solves the bulb itself.