Description
Overview:
The Big End Shells U/S 40 are genuine Villiers bearing shells for the connecting rod big end on classic Villiers single-cylinder engines, including MK20 and MK25. Made from durable, bearing-grade materials designed to handle continuous load and oil film lubrication, they replace worn shells to restore correct oil clearance and smooth running. The undersize is 0.040 in (1.016 mm), intended for use after a crankpin has been reground to this size. Correct clearances reduce knock, improve oil pressure stability, and protect the crankshaft and con-rod. Supplied as unused vintage stock, they may show light storage tarnish that does not affect performance. Ideal for engine overhauls in construction and garden machinery that rely on dependable Villiers power units.
Key Features:
- Genuine Villiers part for assured compatibility and reliability (OEM EM305/040)
- Undersize 0.040 in (1.016 mm) to suit reground crankpins for precise oil clearance
- Manufactured from durable bearing-grade materials for long service life
- Restores engine performance by replacing worn big-end shells and reducing knock
- Helps maintain stable oil pressure and reduces friction-related wear
- Accurate fitment for Villiers MK20 and MK25; also used on C25 variants
- Suitable for rebuilds, routine maintenance, and preventative servicing
- Straightforward replacement when used with correct measurements and torque settings
- Unused old stock vintage item; cosmetic tarnish from storage may be present only
Typical Applications:
Used during engine rebuilds or repairs on Villiers-powered equipment such as compact construction machinery, small plant, generators, mowers, and horticultural tools. Ideal when a crankshaft has been reground by 0.040 in (1.016 mm) and new undersize shells are required to restore correct bearing clearance and reliable operation.
Also known as:
Big-end bearings, con-rod shells, connecting rod bearings, big-end inserts, undersize shells, 40-thou shells, 0.040 in undersize bearings, 1.016 mm undersize bearings.
Fits Models:
MK20, MK25, C25
Product Specifications
| L&S Part No. | EM305/040 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Villiers |
| OEM No. | EM305/040 |
| Unit of Sale | 1 |
| Machine Type | Engines |
| Fits Brands | Villiers |
| Key Features | - Genuine Villiers part for MK20, MK25, C25 engines - Undersize 0.040 in (1.016 mm) for reground crankpins - Durable bearing-grade materials ensure long service life - Restores oil clearance, reducing knock and wear - Suitable for engine rebuilds and preventative maintenance |
| Fits Models | MK20 | MK25 / C25 |
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