§ Fitment Guide
Echo CS-315 chain size & replacement chart
The Echo CS-315 takes a 3/8" Low Profile™ pitch, .050" gauge chain. Below: every factory bar length with its exact drive-link count, cross-referenced to Oregon part numbers, plus the OEM parts list.
Fitment matrix
| Bar length | Pitch | Gauge | Drive links | Oregon chains | Bars / combos |
|---|---|---|---|---|---|
| 10" | 3/8" Low Profile™ | .050" | 40 | S40X3S40-21S40 | — |
| 12" | 3/8" Low Profile™ | .043" / .050" | 45 | 90PX045G91PX045G91VXL045X291VXL045GS45 | 124MLEA041120SXEA041120DGEA041120SDEA04110569827792 |
| 14" | 3/8" Low Profile or 3/8" Low Profile™ | .043" / .050" | 52 | 90PX052G91PX052G91VXL052X291VXL052GPS52S52X3S52S52T | 144MLEA041140SXEA041140SDEA041140DGEA041140SDET0411056992785627856PDQ541652 |
| 16" | 3/8" Low Profile or 3/8" Low Profile™ | .043" / .050" | 56, 57 | 90PX056GS56X391PX057G91PX056G91VXL056X291VXL056G91VXL057GPS56S56-21S56S56TS57-21S57T57X3T57 | 164MLEA041160SXEA041160SPEA041160SDEA041160DGEA041160SDET041623000623000PDQ10570027857PDQ27857541656 |
| 18" | 3/8" Low Profile or 3/8" Low Profile™ | .050" | 62 | 91PX062G91VXL062X291VXL062GPS62S62X3S62S62TT62X3T62 | 180SDEA041180SDET041180DGEA0415403943927239272PDQ541662 |
Source: Oregon part-finder, retrieved 2026-07-06. Part numbers link to the manufacturer's spec page. Always confirm drive-link count against your current chain before ordering.
How to confirm the fit
- Read your bar. The pitch and gauge are stamped on the guide bar near the saw body — e.g.
3/8" LP .050". - Count drive links. Lay the old chain flat and count the teeth that ride inside the bar groove. This number must match exactly; length in inches is not enough.
- Match all three. Pitch, gauge and drive-link count all have to agree with a row in the table above. Two of three is not a fit.
Watch: how to identify chain pitch and gauge
Oregon Products: Identifying Chain Pitch and Chain Gauge Official video from Oregon Products, the manufacturer behind the cross-reference part numbers above.
Official Echo resources
- ECHO product manuals — owner's manual for the CS-315, including tensioning and maintenance intervals.
- ECHO parts catalog lookup — exploded parts diagrams and OEM part numbers.
FAQ
What size chain does a Echo CS-315 take?
The Echo CS-315 runs a 3/8" Low Profile™ pitch, .050" gauge chain. Available bar lengths: 10", 12", 14", 16", 18". Match the drive-link count to your bar (see the table above).
How do I know which gauge my CS-315 chain is?
Check the number stamped on your guide bar near the tail, or measure the drive-link thickness with calipers. Common gauges for the CS-315 are .050", .043" / .050".
Can I put a longer bar on my Echo CS-315?
Oregon lists 10", 12", 14", 16", 18" bars for the CS-315. Stay within this range — a longer bar than the engine is rated for cuts slowly and accelerates wear.