Description
Overview:
The Piston 0.25 - Robin Part - RB234 23402 03 is a replacement engine piston for small air‐cooled petrol engines commonly found in construction and garden machinery such as generators, plate compactors, pumps, and mowers. Manufactured from a high-strength aluminium alloy to balance low weight with durability, it helps restore compression, reduce blow‐by, and support smooth engine operation. The "0.25" typically denotes a 0.25 mm oversize (0.010 in), intended for cylinders that have been re-bored or honed to the matching oversize. Precision ring grooves and a robust skirt profile are designed to maintain correct ring seating and minimise wear. Supplied as a single piston to suit the specified Robin application (reference RB234 23402 03), it is suitable for professional servicing and routine DIY engine maintenance.
Key Features:
- 0.25 mm oversize (0.010 in) to suit properly re-bored/honed cylinders for restored compression
- Aluminium alloy construction for strength, heat dissipation, and reduced reciprocating mass
- Precision-machined crown, skirt and ring lands for consistent sealing and oil control
- OEM-style geometry for correct clearances and straightforward installation when used with matching parts
- Supports reliable cold starts and steady running under continuous site or garden use
- Compatible with Robin/Subaru-type small engines where a 0.25 mm oversize piston is specified
- Helps reduce oil consumption and exhaust smoke when combined with correct rings and bore finish
- Suitable for preventative maintenance or full engine overhauls to extend service life
Typical Applications:
Used during engine rebuilds of Robin-type small petrol engines fitted to compactors, generators, water pumps, lawn and garden equipment, and light construction tools. Ideal when reconditioning a worn cylinder that has been machined to 0.25 mm oversize (0.010 in). Fit with matching oversize rings and the correct gudgeon pin and clips as specified by the engine manufacturer.
Also known as:
0.25 mm oversize piston (0.010 in), OS 0.25 piston, Robin small engine piston, Subaru‐Robin replacement piston, engine rebuild piston, piston for re-bored cylinder, oversize cylinder piston for compactors and generators.
Product Specifications
| L&S Part No. | RB234 23402 03 |
|---|---|
| Unit of Sale | 1 |
| Fits Brands | Robin |
| Key Features | - 0.25 mm oversize for re-bored cylinders - Aluminium alloy for strength and heat dissipation - Precision-machined for consistent sealing and oil control - OEM-style geometry for correct clearances - Compatible with Robin/Subaru small engines |
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