Description
Overview:
The Connecting Rod Bush (Big End) U/Sized .010'' (Pair) is a genuine BSA replacement for the BSA 220cc Industrial Engine. Supplied as a matched pair, these precision-machined bronze bushes support the big end of the connecting rod on the crankpin, helping to maintain correct running clearance and oil film. The .010 inch undersize (0.254 mm) specification suits engines that require an undersize big-end bush to match crankpin condition. Built for long service life, they reduce friction and wear under continuous load, restoring smooth, reliable operation in vintage engines. As unused old stock, they may show light tarnish from storage but remain fully functional. OEM reference: 86 3690. Genuine BSA part for authenticity, correct fit, and dependable performance.
Key Features:
- Genuine BSA part for correct fit and specification
- OEM reference 86 3690 for accurate identification
- Supplied as a pair to service one connecting rod big end
- U/Sized .010'' (0.254 mm) to meet specific rebuild requirements
- Durable bronze construction for excellent wear resistance and heat stability
- Smooth running surface to minimise friction and protect the crankpin
- Suitable for restoration and ongoing maintenance of BSA 220cc Industrial Engines
- Unused vintage stock; may show cosmetic ageing without affecting function
Typical Applications:
Used when refurbishing the big end of the connecting rod on BSA 220cc Industrial Engines, especially during a rebuild or service where an undersize bush is specified. Ideal for restoring oil clearance and reducing knock, vibration, and wear on older engines used in pumps, generators, small plant, and stationary equipment. Appropriate for both professional workshops and experienced DIY maintainers following the engine manual.
Also known as:
Big end bush, big-end bearing bush, connecting rod big-end bush, con-rod bush, crankpin bush, conrod bearing bush, engine big end liner.
Product Specifications
| L&S Part No. | 86 3690 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | BSA |
| OEM No. | 86 3690 |
| Unit of Sale | 1 |
| Machine Type | Engines |
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