Brushcutter / trimmer carburetor ECHO SRM-4605

This Echo SRM-4605 carburetor – a non-original WT-120B type replacement, designed for the Echo brushcutters and clearing saws listed below. It replaces the family of carburetor part numbers 12300047530, 12300047532 and 12300047533.

The SRM-4605 factory parts catalogue lists the 12300047532 / WT-120B carburetor. Later Echo replaced the 12300047532 number with 12300047533.

Echo SRM-4605 Carburetor Compatibility

Fits the following Echo models:

Echo SRM-4605
Serial numbers 20001001–20999999
Echo SRM-4600
Serial numbers from 001001
Echo CLS-4610
Echo CLS-4600
Echo SRM-4605U
Serial numbers S98426001001–S98426999999

Echo uses the same WT-120 carburetor family in these machines. In the SRM-4605 and SRM-4605U diagrams 12300047532 is listed as WT-120B. The combined CLS-4600 / CLS-4610 catalogue also lists the 12300047532 carburetor assembly.

An earlier SRM-4600 parts catalogue used the number 12300043230. In later parts replacement systems this earlier carburetor is associated with the WT-120B / 12300047533 replacement.

Carburetor Numbers

Key numbers:

Walbro WT-120
Walbro WT-120B
Echo 12300043230
Echo 12300047530
Echo 12300047532
Echo 12300047533
Echo 123000-47530
Echo 123000-47532
Echo 123000-47533

The primary current replacement number is 12300047533.

The item for sale is the non-original carburetor shown in the product photos. External intake gaskets, fuel hoses, the throttle cable and air filter parts are separate components if they are not shown together with the carburetor.

Model and Part Check

When selecting the part use the full equipment model name and the number remaining on the old carburetor.

Before installation compare:

Mounting hole spacing
Intake port diameter and shape
Position of the fuel lines
Throttle lever position
Choke mechanism
Locations of the high, low and idle mixture screws

The CLS-4600 and CLS-4610 have different drive shaft and cutting attachment parts, however their factory catalogue lists the same 12300047532 carburetor assembly.

Installation Check

When removing the old carburetor inspect both intake gaskets and the carburetor insulator. Replace hardened, cracked or compressed sealing parts before fitting the new carburetor.

Connect the fuel hose and throttle linkage in the same positions as on the original assembly. Then manually check that the throttle fully opens and returns freely.

After assembly check the fuel connections for leaks. Warm up the engine and carry out final idle, low and high speed mixture adjustments according to the specific model's repair data.

More compatible parts can be found in the Echo brushcutter parts category.