Description
Overview:
The piston for Robin/Subaru EH12 engines (OEM No. 252-23402-03) is a direct-fit internal engine component that restores sealing and performance in small petrol machinery. Typically made from cast aluminium alloy for low weight and excellent heat transfer, it travels within the cylinder to maintain compression and smooth combustion. Built to match factory dimensions for the EH12 single-cylinder, 4‐stroke engine, it supports reliable starting, consistent power, and efficient running when replacing a worn or damaged piston. Suitable for construction and garden equipment powered by the Robin/Subaru EH12, such as plate compactors and water pumps, this piston helps extend engine life and reduce fuel wastage caused by poor compression. It is a practical choice for trades, hire fleets, and DIY users maintaining EH12 machines.
Key Features:
- Direct-fit replacement for Robin/Subaru EH12 petrol engines using OEM 252-23402-03
- Cast aluminium alloy construction for strong heat dissipation and dependable durability
- Precision-machined crown, skirt, and ring grooves for stable sealing and smooth operation
- Helps recover compression, starting performance, and power output in tired engines
- Manufactured to factory specification to maintain correct clearances with the standard bore
- Smooth skirt geometry to minimise friction; compatible with standard EH12 rings and gudgeon pin
- Straightforward to install with normal workshop tools, aiding quick turnaround
- Suitable for frequent use in site, hire, and garden machinery environments
Typical Applications:
Used in EH12-powered equipment including plate compactors, generators, water pumps, pressure washers, tillers, small cement mixers, and chipper/shredders. Ideal when the original piston shows scoring, excessive wear, or loss of compression, and as part of routine engine overhauls to keep machines reliable and efficient on site or at home.
Also known as:
Subaru Robin EH12 engine piston, EH12 piston, engine piston 252-23402-03, RB252 23402 03 piston, piston for Subaru-Robin small engines, replacement piston for EH12.
Fits Models:
EH12
Alternate Part Numbers:
252-23402-03, 2522340203, RB252 23402 03
Product Specifications
| L&S Part No. | RB252 23402 03 |
|---|---|
| Manufacturer | Robin/Subaru |
| OEM No. | 252-23402-03 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Robin |
| Key Features | - Direct-fit replacement for Robin/Subaru EH12 engines - Cast aluminium alloy for heat dissipation - Precision-machined for stable sealing - Compatible with standard EH12 rings and gudgeon pin - Suitable for construction and garden equipment |
| Fits Models | EH12 |
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