These Crankcase Bushes for the JAP 4/3 engine (OEM No. 18535) are genuine JAP parts designed to restore correct running clearances and support within the crankcase of vintage JAP stationary engines. Precision-machined from durable bronze, the bushes keep shafts aligned, control wear and help maintain stable oil films for smooth operation. They are suitable for restorations and routine maintenance on JAP 4/3 engines and are also commonly used across JAP 3 and JAP 4 variants where specified. Supplied as unused old stock, minor surface tarnishing may be present, but function and fit remain to original specification. Being genuine, they match the original dimensions, helping ensure reliable performance, long service life and preservation of authenticity in classic machinery.

Key Features:
– Genuine JAP part for assured compatibility and reliability (OEM No. 18535)
– Bronze construction for excellent wear resistance and stable running
– Made to original specification for correct fit in JAP 4/3 applications
– Helps restore oil clearances, shaft alignment and smooth crankcase operation
– Unused old stock; cosmetic tarnish only, no effect on performance
– Suitable for JAP 3 and JAP 4 engines where this bush size is specified
– Robust and long-lasting; ideal for accurate restorations and regular use
– Typically press-fit; final sizing/reaming may be required by a competent engineer

Typical Applications:
Used during rebuilds and maintenance of vintage JAP 4/3 engines found powering classic plant and garden machinery, such as cement mixers, generators, pumps, compactors and cultivators. Ideal for restoring correct running tolerances in engines that have suffered wear, vibration or oiling issues, and for preserving originality in collector and working machines alike.

Also known as:
Sleeve bush, bronze sleeve bearing, engine bush, cam follower bush, valve lifter bush, case bush, engine sleeve bush.

Fits Models:
JAP 3, JAP 4

Alternate Part Numbers:
18535

Product Specifications