Description
Overview:
The Piston 0.50 - Robin Part - RB234 23403 03 is a precision-engineered oversize piston for small petrol engines commonly used in construction and garden machinery. Built from a durable aluminium alloy for strength, light weight, and good heat dissipation, it restores compression and performance in engines that have been rebored. The 0.50 designation typically refers to a +0.50 mm oversize to suit a matched cylinder bore after wear or scoring. It is suitable for Subaru/Robin-type engines found in generators, water pumps, compactors, pressure washers, tillers, and mowers. The piston's accurate geometry supports smooth operation and reliable starting, helping maintain fuel efficiency and power output. An ideal replacement during scheduled overhauls or repairs, it is made to meet demanding OEM performance expectations.
Key Features:
- 0.50 mm oversize specification for use with correctly rebored cylinders
- Aluminium alloy construction for low mass and effective heat transfer
- Precision-machined crown and skirt for stable compression and reduced blow-by
- Compatible with many Subaru/Robin small four-stroke engines in site and garden equipment
- Helps restore power, starting reliability, and fuel efficiency after wear
- Designed to meet or exceed OEM specifications for fit and operation
- Smooth running characteristics to minimise vibration and friction-related wear
- Reliable under continuous duty typical of generators, pumps, and compactors
- Straightforward to install with standard workshop tools and measurement checks
- Suitable for preventative maintenance during engine rebuilds or refurbishments
Typical Applications:
Used during engine rebuilds on small petrol engines powering plate compactors, generators, water pumps, lawn mowers, scarifiers, rotavators, and pressure washers. Ideal where the cylinder has been rebored to accept an oversize piston, restoring correct clearances and compression for dependable daily use on site, in workshops, or in the garden.
Also known as:
0.50 oversize piston, 0.50 mm OS piston, oversize engine piston for Subaru/Robin, small engine piston for generators and pumps, replacement piston for rebored cylinder, aluminium engine piston for compactors and mowers.
Product Specifications
| L&S Part No. | RB234 23403 03 |
|---|---|
| Unit of Sale | 1 |
| Fits Brands | Robin |
| Key Features | - 0.50 mm oversize for rebored cylinders - Aluminium alloy for strength and heat dissipation - Compatible with Subaru/Robin small engines - Precision-machined for stable compression - Suitable for generators, pumps, and mowers |
Reviews
Ask a Question
Compatibility
Customers also bought
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£83.17 £69.31 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£83.68 £69.73
Related Products
-
![]()
Key Steel (Imperial) Length: 12" Assorted Pack of 20£83.17 £69.31 -
![]()
Flat Bar, Sizes: 20 x 3-6mm - Assorted Pack of 10£83.68 £69.73
