Description
Overview:
The Piston Cp 0.50 for Robin/Subaru EY20 engines is a precision-made replacement piston designed to restore power and reliability in small petrol engines used on construction and garden machinery. Manufactured from a durable aluminium alloy for strength and efficient heat transfer, it is sized for cylinders that have been re-bored to suit a 0.50 mm oversize (+0.020 in). The piston's job is to seal the combustion chamber and convert combustion pressure into useful motion, helping maintain strong compression and smooth running. Suitable for the widely used EY20 engine found on equipment such as compactors, generators, pumps, and light plant, this piston offers a dependable, like-for-like fit that supports long service life when installed with the correct rings and clearances.
Key Features:
- 0.50 mm (+0.020 in) oversize to match re-bored EY20 cylinders
- Aluminium alloy construction for low weight and excellent heat dissipation
- Precision-machined crown, skirt, and ring grooves for reliable sealing and compression
- Direct replacement fit for the EY20 platform to simplify installation
- Helps restore starting performance, power output, and fuel efficiency in worn engines
- Suitable for a range of site and garden machines using the EY20 engine
- Built for consistent performance under continuous use when paired with correct rings and clearances
Typical Applications:
Used during engine overhauls or repairs on EY20-powered equipment such as plate compactors, generators, water pumps, mixers, and light agricultural or landscaping machines. Ideal when the original cylinder has been re-bored to the next service size, addressing wear, scoring, loss of compression, hard starting, or excessive oil consumption.
Also known as:
EY20 0.50 mm oversize piston, EY20 OS +0.50 piston (+0.020 in), Subaru-Robin EY20 cylinder piston, 0.50 mm over piston, EY20 engine piston replacement, CP 0.50 piston for EY20, oversize piston for Robin/Subaru EY20.
Fits Models:
EY20
Alternate Part Numbers:
RB227 23403-03, RB2272340303, RB227 23403 03
Product Specifications
| L&S Part No. | RB227 23403 03 |
|---|---|
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Robin |
| Key Features | - 0.50 mm oversize for re-bored EY20 cylinders - Aluminium alloy for strength and heat dissipation - Precision-machined for reliable sealing and compression - Direct replacement fit for EY20 engines - Suitable for compactors, generators, and pumps using EY20 |
| Fits Models | EY20 |
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