Description
Overview:
This 0.25 oversize piston is an OEM-spec replacement for Robin/Subaru EH09 petrol engines. Made from a durable, lightweight aluminium alloy for efficient heat transfer and low reciprocating mass, it restores correct compression and smooth operation in worn cylinders that require a first oversize. The piston is engineered for a precise fit in the EH09, supporting reliable starting, steady idle and consistent power under load in compact construction and garden machinery. Marked with OEM No. RB274 23402 03 for accurate identification, it suits workshop rebuilds and planned maintenance where a rebore or hone to +0.25 mm is specified. Suitable for professional users and DIY maintenance of equipment powered by the EH09.
Key Features:
- 0.25 oversize (+0.25 mm) to recover compression and performance after cylinder wear
- Aluminium alloy construction for strength, heat dissipation and reduced friction
- OEM No. RB274 23402 03 for straightforward cross-checking and parts identification
- Machined to tight tolerances for a reliable fit in Robin EH09 cylinders
- Supports efficient combustion, easier starting and stable running
- Compatible with standard EH09 gudgeon pin and connecting rod dimensions
- Suited to workshop rebuilds; consistent quality for repeatable results
- Smooth crown and skirt finish to help reduce scuffing and bore wear
- Helps extend engine service life when installed with correct clearances
- Clear oversize marking to reduce fitting errors during assembly
Typical Applications:
Used during engine overhauls of Robin EH09 units fitted to compactors, generators, water pumps, tillers, mixers and similar small plant. Ideal when the cylinder has been re-bored or honed to the first oversize, restoring sealing and power for equipment in building, landscaping, hire fleets and domestic garden use.
Also known as:
0.25 oversize piston, +0.25 piston, 0.25 mm over piston, EH09 engine piston (oversize), EH09 0.25 OS piston, Robin EH09 replacement piston, EH09 rebore piston.
Fits Models:
EH09
Product Specifications
| L&S Part No. | RB274 23402 03 |
|---|---|
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Robin |
| Key Features | - 0.25 mm oversize for worn EH09 cylinders - Aluminium alloy for heat dissipation and strength - OEM No. RB274 23402 03 for easy identification - Precise fit for Robin EH09 engines - Compatible with standard EH09 gudgeon pin and rod |
| Fits Models | EH09 |
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