Echo Primer Bulb: Part Number and Fitment

Echo's primer bulb for its 21-25cc engine family is part 12538108660, confirmed across more than a dozen independent listings covering the SRM-225, SRM-210, SRM-211, SRM-230, SRM-231, SRM-265, GT-200, GT-210, GT-225, GT-230, PPF-210, PAS-225, PE-200, PE-225, PE-230 and the PB-200 blower family. A paired number, 12538146730, shows up alongside it on many of the same listings - treat the two as a matched set rather than alternatives if a kit lists both.

It crosses directly to Zama 0057003 and 0057004, which is the number that actually decides fitment - see below.

Echo buys its carburetors from Zama, and the primer bulb is a Zama-carburetor component, sized to the carburetor body rather than stamped with any brand logo. That is why the same physical bulb - Zama 0057003/0057004, Echo's 12538108660 - is cross-listed for Stihl FS55, FS90, BG55, BG56 and Husqvarna 128LD, 130BT, 150BT trimmers and blowers in several of the same listings that name the Echo fitment. If a bulb is the right physical size and mounts the same way (snap-in dome, not threaded), the badge on the housing around it does not matter.

What does matter is getting the right generation for your carburetor - see the next section.

The second row is the generation split that causes most of the wrong-part orders: an older SRM-210 or GT-200-series machine built around the Zama C1U/C1Q-M carburetor does not take the 12538108660 bulb that fits the current RB-carburetor models, even though the model names look almost identical. Match the carburetor stamp, not just the model number, if your machine is more than a few years old.

A primer bulb that will not fill, or fills and then goes soft again, is drawing air rather than fuel - the same symptom a cracked fuel line produces, because both let air into a system that needs to stay sealed. The full diagnostic order - fresh fuel, then filter, then lines and bulb, then carburetor - is covered on the won't-start page. This page exists for the step after that diagnosis: once the bulb is confirmed as the fault, the number above is what to order.

Sellers frequently bundle the primer bulb with the fuel line kit - on the SRM-225/210 family that kit is numbered 90069/90097, documented on the SRM-210 parts page - since both parts are rubber, age the same way, and tend to fail within a season of each other. Buying them separately is fine if only one has actually failed.