Description
Overview:
This genuine Robin/Subaru piston is a direct replacement for the EY15 petrol engine (OEM No. RB281 23401 03). Built from durable aluminium alloy with a machined finish, it restores correct compression and efficient combustion, helping your engine start reliably, run smoothly and deliver full power. The piston transfers combustion force to the connecting rod while managing heat and minimising friction within the cylinder. It is suitable for a wide range of compact construction and garden machinery powered by the EY15, such as portable generators, water pumps, small mixers and plate compactors. Being an original Robin/Subaru component, it matches the factory design and tolerances for the EY15, ensuring compatibility with the specified gudgeon pin and ring set and supporting long service life under regular site or garden use.
Key Features:
- Genuine Robin/Subaru OEM part for EY15 (RB281 23401 03) for assured fit and function
- Aluminium alloy construction for strength, light weight and good heat dissipation
- Precision-machined crown, ring grooves and pin bore for reliable sealing and smooth operation
- Designed to work with the correct EY15 piston rings and gudgeon pin (not included)
- Helps recover lost compression, power and fuel efficiency after wear or scoring
- Smooth skirt finish aids oil control and reduces friction and piston slap
- Stable performance in continuous-duty applications common on site and in the garden
- Consistent quality and reliability from an original Robin/Subaru component
- Straightforward installation for competent DIY users and professional mechanics
- Supports reduced downtime during scheduled overhauls and repairs
Typical Applications:
Engine rebuilds and routine overhauls of Robin/Subaru EY15 engines in site generators, water pumps, lawn and garden equipment, small cement mixers, tillers and light compaction machinery. Suitable when addressing low compression, heavy oil consumption, smoke, noise from piston wear, or after cylinder reconditioning.
Also known as:
EY15 piston, Robin EY15 engine piston, Subaru EY15 piston, Robin/Subaru cylinder piston EY15, replacement piston RB281-23401-03, OEM EY15 piston, petrol engine piston for EY15.
Fits Models:
EY15
Product Specifications
| L&S Part No. | RB281 23401 03 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Robin/Subaru |
| OEM No. | RB281 23401 03 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Robin |
| Key Features | - Genuine OEM part for Robin/Subaru EY15 engine - Aluminium alloy for strength and heat dissipation - Precision-machined for reliable sealing and operation - Compatible with EY15 piston rings and gudgeon pin - Restores compression and fuel efficiency in EY15 engines |
| Fits Models | EY15 |

