Subaru Industrial 263-23422-j3 Piston 0.25mm Oversize

Product Description

The SUBARU INDUSTRIAL 263-23422-j3 is a 0.25mm oversize piston designed as a replacement internal engine component for Subaru Industrial small engines. Oversize pistons are used during engine rebuilds when the cylinder bore has been honed or bored beyond the standard diameter, restoring proper clearance between the piston and cylinder wall. This piston is installed by small engine mechanics and equipment technicians as part of a top-end or full engine overhaul to return the engine to factory-specified compression and performance.

This oversize piston is suited for use in Subaru Industrial small engine applications commonly found in lawn and garden equipment, generators, and other power equipment. It is intended for use when the original bore has worn beyond service limits and the cylinder has been machined to accept a 0.25mm oversize piston. Proper piston-to-bore clearance must be verified during installation per the engine service manual specifications.

Key Features

• 0.25mm oversize designation for use in rebored or honed cylinders
• OEM replacement part from Subaru Industrial for direct fitment
• Designed for use during engine rebuilds and top-end overhauls
• Restores proper compression and piston-to-bore clearance after cylinder machining

Compatibility

Designed as an OEM-style replacement piston for Subaru Industrial small engines requiring a 0.25mm oversize piston after cylinder boring or honing.

Installation Notes

Installation should be performed by a qualified small engine technician. The cylinder bore must be measured and confirmed to match the oversize piston diameter before installation. Shut down and cool the engine completely before disassembly. Follow the Subaru Industrial engine service manual for piston ring gap, piston pin clearance, and torque sequences during reassembly.

Technical Specifications

• Oversize: 0.25mm
• Part Type: Piston

Standard Information

• Brand: SUBARU INDUSTRIAL
• Manufacturer Part Number: 263-23422-j3