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

What It Is

This is a replacement primer bulb assembly (cross-reference numbers 640259, 36045A, 36045) designed to restore the fuel priming function on Tecumseh LEV80, LEV90, LV148EA, and LV148XA engines, commonly used in Toro 20001, 20003, 20005, 20007, and 20008 walk-behind mowers. It creates vacuum to draw fuel into the carburetor for easier cold starts.

Fitment & Compatibility

• Engines: Fits Tecumseh LEV80, LEV90, LV148EA, LV148XA (check engine model number stamped on shroud or near spark plug).
• Mowers: Direct replacement for Toro models 20001, 20003, 20005, 20007, 20008. Also fits many other brands using these Tecumseh engines (e.g., Craftsman, Murray, Yard Machines).
• OEM vs Aftermarket: This is an aftermarket part, not OEM Toro/Tecumseh. Verify the bulb diameter (typically ~1 inch) and stem length match your old one. Measure the old bulb’s base flange thickness—some aftermarket bulbs are slightly thinner and may pop off.
• What to check before buying: Confirm your carburetor has a removable primer bulb (not a sealed primer system). Look for two small holes on the carb body where the bulb snaps in. If the bulb is glued or pressed in permanently, this won’t work.

Key Things to Know

• Quality: At $6.99, it’s a budget option. Some users report the rubber feels softer than OEM, which can lead to cracking within a season. Expect 1-2 years of use under normal conditions.
• Installation: Simple—remove the old bulb by prying it out with a flathead screwdriver, then press the new one in until it snaps flush. No tools needed beyond a screwdriver. Takes under 5 minutes.
• Common gotcha: The aftermarket bulb may not seat perfectly in older, worn carburetor housings. If it pops off during priming, apply a tiny dab of gas-resistant silicone sealant around the rim.
• Performance: Restores firm primer feel and reliable fuel draw. If the mower still won’t start after replacement, the carburetor itself may be clogged.

Should You Buy It

Buy this if you have a Tecumseh LEV80/90 or LV148 series engine with a removable primer bulb and want a cheap, quick fix for a hard-starting mower. It’s ideal for budget-conscious DIYers who don’t mind a slightly shorter lifespan than OEM. Avoid if you need a perfect OEM fit or if your carburetor has a sealed primer system—in that case, replace the entire carburetor.