Description
Overview:
This piston is a Genuine OEM replacement part for the JAP Model 6 engine, supplied as piston only with no rings. It is a +0.020 inch oversize component intended for use after a cylinder rebore, helping to restore correct compression and running clearances. The nominal base bore is 3 3/8 in (85.73 mm); the finished piston diameter is approximately 3.395 in (86.23 mm). Manufactured in aluminium alloy for strength-to-weight and heat transfer. Suitable for vintage JAP Model 6 engines commonly found powering small construction and garden machinery such as mixers, pumps, generators, and mowers. OEM reference: SSA24 020. Note: This is unused old stock (vintage NOS) and may show age-related storage marks, tarnishing, or light soiling that do not affect function. Supplied as a single piston only; no rings, pin, or clips.
Key Features:
- Genuine JAP OEM piston, unused old stock (NOS)
- Part type: piston only, no rings supplied
- OEM reference: SSA24 020
- Size: 3 3/8 in bore, +0.020 in oversize
- Approx diameter: 3.395 in (86.23 mm)
- Standard bore reference: 3.375 in (85.73 mm)
- Aluminium alloy casting for efficient heat transfer
- Suits cylinders rebored to +0.020 in oversize
- Accepts standard JAP Model 6 piston pin
- No gudgeon pin or clips included
- Supplied singly; quantity one per cylinder
- Requires workshop-specified piston-to-bore clearance
- For petrol small-engine applications in site and garden equipment
Typical Applications:
Used in JAP Model 6 engines after a +0.020 in rebore to restore correct fit and sealing. Common on vintage small plant and garden machinery, including cement mixers, water pumps, generators, and heavy-duty mowers. Suitable where reliable combustion sealing, heat transfer, and piston stability are required under regular operating loads.
Also known as:
Engine piston, oversize piston +0.020 in, 3 3/8 inch piston, JAP SSA24-020 piston, JAP Model 6 oversize piston, replacement piston, NOS JAP piston, vintage JAP engine piston.
Fits Models:
JAP Model 6
Alternate Part Numbers:
MODEL 6
Product Specifications
| L&S Part No. | SSA24 020 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | JAP |
| Unit of Sale | 1 |
| Fits Models | JAP 6 |


