Cylinder kit for trimmer / brushcutter ECHO 4605

This Echo SRM-4605 cylinder kit – a 42 mm non-original cylinder and piston assembly, intended for compatible ECHO brushcutters and clearing saws with the 45,7 cm³ engine family.

ECHO SRM-4605 engine cylinder bore is 42,0 mm, piston stroke – 33,0 mm, and displacement – 45,7 cm³. The original cylinder number is 10101147530.

Compatible Echo Models

Fits compatible versions of these models:

Echo SRM-4605
Echo SRM-4600
Echo CLS-4610
Echo CLS-4600
Echo SRM-4510
Echo SRM-4605U
Shindaiwa B451
Shindaiwa B460

These models use the same OEM cylinder number 10101147530.

Before ordering, compare the device model, OEM number and the 42 mm cylinder bore.

Echo SRM-4605 Engine Specifications
Cylinder bore: 42,0 mm
Piston stroke: 33,0 mm
Engine displacement: 45,7 cm³
Engine type: 2-stroke petrol
OEM cylinder number: 10101147530
Current piston number: P021015771
Previous piston number: P021015770

The newer number P021015771 replaced the previous P021015770, so both numbers may appear in parts catalogs and earlier repair documents.

When to Replace the Cylinder and Piston?

The cylinder and piston assembly should be replaced when the original parts are heavily worn or mechanically damaged.

Most common damages:

Deep scratches on the cylinder wall
Seized piston
Aluminum adhered to the cylinder wall
Damaged piston
Reduced compression due to cylinder or piston wear

Before installing new parts, check the crankshaft, connecting rod, and the piston pin bearing.

It is also important to determine the cause of the old cylinder or piston damage. Incorrect carburetor adjustment, air leak in the intake system, damaged crankshaft seals, or an incorrect mixture of petrol and two-stroke oil can cause engine overheating.

Before assembly, thoroughly clean the crankcase surface. Install the piston in the correct orientation, and set the piston ring according to its locating pin.

After assembly, manually rotate the crankshaft several times. The piston should move freely through the full 33 mm stroke.

Find more suitable engine and fuel system parts in the Echo brushcutter parts category.