The Big End Shells Undersize 030 are genuine Villiers bearing inserts for the connecting rod big end on Villiers MK10 engines. Manufactured from robust, bearing‐grade metals with an anti‐friction overlay, they restore correct oil clearance and smooth running when a crankpin has been reground. Specified as 0.030 in undersize (0.76 mm), these shells match an undersize crank to maintain pressure-fed lubrication and reduce wear, noise, and heat. Supplied to OEM standards under Manufacturer Part Number EM554/030, they provide a precise, reliable fit for servicing or rebuilding MK10 engines used across small plant and garden machinery. A straightforward replacement for worn shells, they help protect the crankshaft and connecting rod, extending engine life while maintaining consistent performance. Genuine Villiers part for assured compatibility.

Key Features:
– Genuine Villiers part for accurate fit and dependable service life
– 0.030 in undersize (0.76 mm) to suit reground crankpins and restore clearance
– Precision-machined bearing surfaces for stable oil film and low friction
– Durable anti‐wear overlay designed for sustained load and start‐stop use
– Manufactured to OEM tolerances to protect crankshaft and connecting rod
– Direct replacement for worn or scored shells to recover oil pressure
– Clear identification: MPN EM554/030 for easy parts matching
– Helps reduce knock, vibration, and heat by maintaining correct bearing geometry
– Suitable for trades, workshops, and DIY maintenance on Villiers MK10 engines
– Supports reliable cold starts and consistent running under working loads

Typical Applications:
Used during engine rebuilds or routine overhauls of Villiers MK10 units in compact construction equipment, generators, pumps, cultivators, and lawn or garden machinery. Ideal after crankshaft regrinding to 0.030 in (0.76 mm) undersize. Fit when restoring oil pressure, addressing knocking from the big end, or preventing scoring and premature wear. Always verify crankpin size and check oil clearances against service data during installation.

Also known as:
Con‐rod bearings, connecting rod shells, crankpin bearings, big‐end inserts, bearing shells, conrod big‐end shells, undersize con‐rod bearings, crankshaft big‐end shells.

Fits Models:
MK10

Alternate Part Numbers:
1257 020, 1257020

Product Specifications