Autoparts 100PCS Primer Bulb Pump Fit for Homelite Echo Stihl Poulan Zama # 0057003 0057004

What It Is

This is a bulk pack of 100 aftermarket primer bulbs designed for small engines on handheld outdoor power equipment—chainsaws, trimmers, blowers, and leaf blowers. The bulbs replace the original Zama #0057003 and #0057004 part numbers, commonly used on Homelite, Echo, Stihl, and Poulan models.

Fitment & Compatibility

• Check your existing primer bulb’s part number – Look for Zama #0057003 or #0057004 stamped on the bulb or in your machine’s manual. This kit matches both.
• Brand cross-reference – Works on many Homelite, Echo, Stihl, and Poulan models, but also fits some Craftsman, Ryobi, and Weed Eater units. Always verify by bulb shape and connector type (push-fit vs. screw-on).
• Measure the bulb – These are small, round bulbs (approx. 1/2" diameter). Not for large, rectangular or flat bulbs found on walk-behind mowers or tractors.
• OEM vs. aftermarket – This is a generic replacement, not OEM Zama. Fit is generally good, but slight variations in rubber firmness or nipple length may occur.

Key Things to Know

• Quality varies – Many buyers report these work fine, but some bulbs may be slightly stiffer than OEM, making priming a bit harder. Inspect each bulb for cracks before installation.
• Installation is easy – No special tools needed. Push the bulb into the primer well until it snaps in place. For screw-on types, ensure threads match.
• Common gotcha – If the new bulb doesn’t seat fully or leaks, the old bulb’s retaining ring or grommet may be worn. Replace those too if needed.
• Bulk pack – You get 100 bulbs, so you’ll have spares for multiple machines or future replacements. Not cost-effective if you only need one or two.

Should You Buy It

Buy this if you maintain several small engines (trimmers, blowers, chainsaws) and want a cheap, bulk supply of primer bulbs that fit common Zama #0057003/0057004 applications. Skip it if you only need one replacement—buy a single OEM Zama bulb instead for guaranteed fit and softer feel.