Description
Overview:
The metering diaphragm is a small but vital carburettor component that controls how much fuel reaches the engine under changing load and speed. This Genuine ECHO part (OEM P003001850) is made from a fuel‐resistant elastomer with fabric reinforcement to retain flexibility and sealing accuracy over time. It maintains the correct pressure on the metering side of the carburettor so the needle lever opens and closes precisely, supporting reliable starting, a steady idle and clean acceleration. Designed for ECHO two‐stroke petrol equipment, it is a direct replacement used widely across chainsaws (including CS-450 and CS-550) and other handheld machines listed below. Fitting a fresh diaphragm during routine servicing helps restore performance when the original has hardened, warped, or been affected by stale fuel.
Key Features:
- Genuine ECHO part for assured fit and function (OEM P003001850)
- Accurate fuel regulation for easy starting, stable idle and crisp throttle response
- Fuel‐resistant construction designed to cope with modern pump fuels
- Fabric‐reinforced membrane helps resist stretching and deformation
- Direct replacement with no modifications required
- Helps prevent flooding, lean running and hesitation caused by a tired diaphragm
- Supports reliable operation across a wide range of ECHO handheld tools
- Suitable for preventative maintenance to reduce downtime
Typical Applications:
Used during carburettor servicing of ECHO chainsaws and other handheld tools when engines are hard to start, surge at idle, bog on acceleration, or have been stored with old fuel. Ideal for workshop overhauls or on‐site maintenance to keep professional and domestic machines running smoothly.
Also known as:
Carb metering membrane, needle lever diaphragm, metering chamber membrane, carburettor metering membrane, fuel control diaphragm, carb membrane.
Fits Models:
250TCS, 250TS, 251TCS, 251TS, 251WS, 280TCS, 280TS, 305S, 341AC, 390SX, 402S, 491S, 501SX, AH243S-LW, BCLS-520ES, CS-2510TES, CS-2511TES, CS-2511WES, CS-280TES, CS-280TES-, CS-280WES, CS-281WES, CS-310ES, CS-320TES, CS-350WES, CS-3510AC, CS-3510ES, CS-352AC, CS-352ES, CS-355T, CS-370ES, CS-390ESX, CS-420ES, CS-450, CS-490ES, CS-500ES, CS-501SX, CS-550, CS310ES, CS352AC, CS352ES, CS355T, CS370ES, CS420ES, CS450, CS490ES, CS500ES, CS501SX, CS550, EB221S, EB250, EB3410, EB600RT, EB770, EB8520RT, ES-250ES, ES250ES, HC-30ES, HC30ES, MB-440, MB-580, MB-5810, MB440, MB580, MB5810, PB-250, PB-580, PB-760LN, PB-770, PB-8010, PB250, PB580, PB760LN, PB770, PB8010, PPT-300ES, RM-410ES, RM-510, RM-510ES, RM-520ES, RM410ES, RM510, RM510ES, RM520ES, SRM-300TES/L, SRM-300TES/U, SRM-335ES/U, SRM-335TES/L, SRM-335TES/U, SRM-410ES/U, SRM-420ES-LW, SRM-420TES/U, SRM-520ES/U
Alternate Part Numbers:
P003001850
Product Specifications
| L&S Part No. | ECP003001850 |
|---|---|
| Part Type | Genuine Part |
| Unit of Sale | 1 |
| Applications | 250TCS, 250TS, 251TCS, 251TS, 251WS, 280TCS, 280TS, 305S, 341AC, 390SX, 402S, 491S, 501SX, AH243S-LW, BCLS-520ES, CS-2510TES, CS-2511TES, CS-2511WES, CS-280TES, CS-280TES-, CS-280WES, CS-281WES, CS-310ES, CS-320TES, CS-350WES, CS-3510AC, CS-3510ES, CS-352AC, CS-352ES, CS-355T, CS-370ES, CS-390ESX, CS-420ES, CS-450, CS-490ES, CS-500ES, CS-501SX, CS-550, CS310ES, CS352AC, CS352ES, CS355T, CS370ES, CS420ES, CS450, CS490ES, CS500ES, CS501SX, CS550, EB221S, EB250, EB3410, EB600RT, EB770, EB8520RT, ES-250ES, ES250ES, HC-30ES, HC30ES, MB-440, MB-580, MB-5810, MB440, MB580, MB5810, PB-250, PB-580, PB-760LN, PB-770, PB-8010, PB250, PB580, PB760LN, PB770, PB8010, PPT-300ES, RM-410ES, RM-510, RM-510ES, RM-520ES, RM410ES, RM510, RM510ES, RM520ES, SRM-300TES/L, SRM-300TES/U, SRM-335ES/U, SRM-335TES/L, SRM-335TES/U, SRM-410ES/U, SRM-420ES-LW, SRM-420TES/U, SRM-520ES/U |
| Machine Type | Chainsaws |
| Fits Brands | Echo |
| Fits Models | CS-2511TES | CS-2510TES | CS-280TES | CS-320TES | CS-355T | CS-310ES | CS-3510ES | CS-3510AC | CS-420ES | CS-2511WES | CS-501SX | CS-280WES | CS-281WES | CS-350WES | CS-352AC | CS-352ES | CS-370ES | CS-390ESX | CS-450 | CS-490ES | CS-500ES | CS-550 | PPT-300ES | HC-30ES | ES-250ES | PB-250 | SRM-420TES/U | SRM-520ES/U | BCLS-520ES | SRM-300TES/U | SRM-335ES/U | SRM-335TES/U | SRM-410ES/U | SRM-420ES-LW | RM-520ES | RM-410ES | RM-510 | RM-510ES | SRM-300TES/L | SRM-335TES/L | PB-580 | PB-770 | PB-8010 | PB-760LN | MB-440 | MB-580 | MB-5810 | EB770 | 251TCS | 251TS | 250TCS | 250TS | 280TS | 280TCS | 305S | 501SX | 251WS | 341AC | 390SX | 402S | 491S | EB600RT | EB8520RT | EB221S | EB250 | EB3410 | AH243S-LW |
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