Description
Overview:
This Fuel Pump Diaphragm is a Genuine Echo part for use in small two‐stroke Echo machines, including chainsaws such as the CS-2511TES and CS-2510TES. It is a thin, flexible, fuel‐resistant membrane that sits in the carburettor pump section and uses crankcase pulses to move fuel from the tank to the metering chamber. Made from a durable elastomer/laminate composite with precision punch-outs, it helps maintain consistent fuel delivery, stable idle and clean acceleration. Supplied as a direct replacement for OEM No. 12311215030, it restores performance where the original diaphragm has hardened, cracked or lost flexibility due to age or ethanol in petrol. Suitable for routine servicing and repairs across a wide range of Echo handheld tools listed below.
Key Features:
- Genuine Echo Part for assured fit and function
- Direct replacement for OEM No. 12311215030
- Fuel‐resistant composite material to withstand modern pump fuels (including ethanol blends)
- Restores reliable priming, fuel flow and throttle response
- Helps cure hard starting, bogging and inconsistent idle caused by a worn diaphragm
- Precision apertures and sealing faces for a leak‐free interface with the carburettor body
- Compatible with many Echo chainsaws, blowers and brushcutters
- Quick to fit during standard carburettor service with basic hand tools
- Suitable for preventative maintenance to extend engine life and reduce downtime
Typical Applications:
Used during carburettor overhauls or fuel system repairs on Echo two‐stroke equipment when symptoms include poor starting, uneven running, fuel starvation or loss of prime. Ideal for professional arborists, landscapers, grounds teams and home users maintaining Echo chainsaws, blowers and brushcutters on regular service intervals or after long storage with stale fuel.
Also known as:
Fuel pump membrane, carburettor pump diaphragm, carb pump membrane, pulse‐pump diaphragm, chainsaw fuel diaphragm, Zama‐type pump diaphragm (generic description).
Fits Models:
250TCS, 250TS, 2510TES, 2511WES, 251TCS, 251TS, 251WS, 2600ES, 260T, 260TES, 269TS, 270WES, 280TCS, 280TES, 280TS, 280WES, 281WES, 305S, 310ES, 320TES, 320TS, 341AC, 350TES, 350WES, 3510AC, 3510ES, 352AC, 352ES, 355T, 3700ES, 370ES, 390ESX, 390SX, 402S, 420ES, 4400, 450, 452ESX, 452S, 490ES, 491S, 500ES, 501SX, BCLS-520ES, CS-2510TES, CS-2511TES, CS-2511WES, CS-2600ES, CS-260T, CS-260TES, CS-270WES, CS-280TES, CS-280WES, CS-281WES, CS-310ES, CS-320TES, CS-350TES, CS-350WES, CS-3510AC, CS-3510ES, CS-352AC, CS-352ES, CS-355T, CS-3700ES, CS-370ES, CS-390ESX, CS-420ES, CS-4400, CS-450, CS-452ESX, CS-490ES, CS-500ES, CS-501SX, CS260T, CS310ES, CS352AC, CS352ES, CS355T, CS370ES, CS420ES, CS4400, CS450, CS490ES, CS500ES, CS501SX, EB250, EB600RT, ES-250ES, ES250ES, PB-250, PB-580, PB-8010, PB250, PB580, PB8010, RM-520ES, RM520ES, SRM-520ES/U
Alternate Part Numbers:
12311215030
Product Specifications
| L&S Part No. | EC12311215030 |
|---|---|
| Part Type | Genuine Part |
| Unit of Sale | 1 |
| Applications | 250TCS, 250TS, 2510TES, 2511WES, 251TCS, 251TS, 251WS, 2600ES, 260T, 260TES, 269TS, 270WES, 280TCS, 280TES, 280TS, 280WES, 281WES, 305S, 310ES, 320TES, 320TS, 341AC, 350TES, 350WES, 3510AC, 3510ES, 352AC, 352ES, 355T, 3700ES, 370ES, 390ESX, 390SX, 402S, 420ES, 4400, 450, 452ESX, 452S, 490ES, 491S, 500ES, 501SX, BCLS-520ES, CS-2510TES, CS-2511TES, CS-2511WES, CS-2600ES, CS-260T, CS-260TES, CS-270WES, CS-280TES, CS-280WES, CS-281WES, CS-310ES, CS-320TES, CS-350TES, CS-350WES, CS-3510AC, CS-3510ES, CS-352AC, CS-352ES, CS-355T, CS-3700ES, CS-370ES, CS-390ESX, CS-420ES, CS-4400, CS-450, CS-452ESX, CS-490ES, CS-500ES, CS-501SX, CS260T, CS310ES, CS352AC, CS352ES, CS355T, CS370ES, CS420ES, CS4400, CS450, CS490ES, CS500ES, CS501SX, CS: 2511TES, EB250, EB600RT, ES-250ES, ES250ES, PB-250, PB-580, PB-8010, PB250, PB580, PB8010, RM-520ES, RM520ES, SRM-520ES/U |
| Fits Brands | Echo |
| Fits Models | CS-2511TES | CS-2510TES | CS-2600ES | CS-260T | CS-260TES | CS-280TES | CS-320TES | CS-350TES | CS-355T | CS-310ES | CS-3510ES | CS-3510AC | CS-420ES | CS-2511WES | CS-501SX | CS-270WES | CS-280WES | CS-281WES | CS-350WES | CS-352AC | CS-352ES | CS-370ES | CS-390ESX | CS-3700ES | CS-4400 | CS-450 | CS-452ESX | CS-490ES | CS-500ES | ES-250ES | PB-250 | SRM-520ES/U | BCLS-520ES | RM-520ES | PB-580 | 251TCS | 251TS | 250TCS | 250TS | 269TS | 280TS | 280TCS | 320TS | 305S | 501SX | 251WS | 341AC | 390SX | 402S | 452S | 491S | EB600RT | EB250 | PB-8010 |
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