Speed Feed 400 Trimmer Head Cap and Spring Kit for Echo, Trimmer Replacement Spool Cap Covers Compatible with Echo SRM-225, SRM-230, PAS-225 Trimmer Heads, Echo Weed Eater Parts X472000070, 2 Pack

What It Is

This is a replacement cap and spring kit for Speed Feed 400-style trimmer heads. It includes the outer spool cap and the internal spring that keeps the line feeding mechanism working. Designed for Echo trimmers with Speed Feed 400 heads, it restores line advancement when the original cap cracks or the spring loses tension.

Fitment & Compatibility

Before buying, confirm your trimmer uses a Speed Feed 400 head (not Speed Feed 450 or 500). This kit fits Echo models including SRM-225, SRM-230, and PAS-225. The OEM part number is X472000070. Measure the cap diameter: Speed Feed 400 caps are about 2.5 inches across. If your cap is larger or the head has a metal base, you likely have a different model. This is an aftermarket kit, not OEM Echo—fitment may vary slightly on older heads or if your head has been modified.

Key Things to Know

• Quality is average. Users report the spring is slightly weaker than OEM, which can cause slower line feed. The cap plastic is thinner and may crack sooner than the original.
• Installation is straightforward. Remove the old cap, replace the spring, snap on the new cap. No tools needed. Make sure the spring sits flat inside the spool.
• Common gotcha: The cap may pop off during use if not fully seated. Push down firmly until you hear a click. If it still comes off, the spring might be too short—try reusing the original spring.
• Two-pack is useful. If one cap fails, you have a backup. But some users report both caps in the pack have the same weak spring issue.

Should You Buy It

Buy this if your Speed Feed 400 cap is cracked or missing and you want a cheap, quick fix. Skip it if you need reliable long-term performance—pay extra for the OEM Echo cap/spring kit (part X472000070) for better durability and consistent line feed.