This compression spring is a precision-engineered replacement component designed specifically for Ego ST1500, ST1500-S, ST1500F, ST1500SF, ST1500XY, ST1510S, ST1510T, ST1520, ST1520S, ST1530, and STA1500 15-inch string trimmers.

Manufactured from durable steel with a corrosion-resistant finish, the spring maintains consistent tension within the trimmer head, ensuring reliable line advancement during operation. The coiled construction provides optimal rebound force without deformation over repeated use, contributing to stable performance across various cutting conditions. This part meets OEM specifications for fit and function, making it a suitable direct replacement for the original factory spring. The primary role of this spring is to restore the proper tension mechanism inside the bump-feed trimmer head. When the trimmer head is tapped on the ground, the spring compresses and then expands to push the cutting line forward. A worn or stretched original spring can cause inconsistent line release or jamming, leading to interruptions during trimming. By replacing the worn component with this compression spring, users can restore smooth, predictable line feeding and reduce the need for manual line adjustments. The spring’s consistent elasticity helps maintain reliable operation even under moderate to heavy trimming loads.

Crafted from hardened steel wire, the spring offers a balance of flexibility and resilience. Its tightly wound coils are designed to withstand repeated compression cycles without taking a permanent set. The surface treatment provides basic protection against moisture and debris encountered in typical lawn care environments. While not intended for extreme exposure or submersion, the spring holds up well under normal outdoor use. The dimensional accuracy of the spring ensures a snug fit within the trimmer head assembly, minimizing play or rattling that could affect performance. This replacement part is intended for DIY repairs and routine maintenance of compatible Ego string trimmers. It is particularly useful for users who experience worn-out or failing line advance mechanisms. The spring requires no special tools for installation—simply remove the trimmer head, replace the old spring, and reassemble. Given its modest price point, owning a spare spring can be a practical way to extend the service life of the trimmer head without purchasing a complete replacement assembly. The component is lightweight and easy to store for future needs. Offered at a very affordable price, this compression spring provides a cost-effective solution for restoring proper trimmer head function. It delivers reliable tension support that mirrors the performance of the original part without requiring complex modifications. Users who maintain multiple compatible trimmers or frequently trim in heavy grass will find this spare spring a sensible addition to their maintenance kit. The straightforward compatibility list ensures a seamless match for the specified Ego models, making it a convenient choice for routine upkeep.