The Piston Pin (P/N 10-91423-8) is a critical reciprocating engine component responsible for articulating the piston to the connecting rod, thereby transmitting the immense forces generated during the combustion cycle to the crankshaft.
This precision-machined component ensures the smooth, controlled movement of the piston within the cylinder bore, allowing for the conversion of linear motion into rotational motion. Proper fitment and material integrity of the Lycoming P/N 10-91423-8 are paramount to the operational longevity and reliability of the entire engine assembly, preventing premature wear on associated components like the piston skirt, connecting rod small end bushing, and cylinder walls.
Specifications
- Part Number: 10-91423-8
- Manufacturer: Lycoming Engines
- Type: Hollow Cylindrical Piston Pin
- Material: High-strength, case-hardened alloy steel, typically carburized for enhanced surface hardness and wear resistance while maintaining a tough core.
- Finish: Precision ground and polished to exacting tolerances, often with a fine surface finish to minimize friction and promote optimal lubrication.
- Form Factor: Tapered or straight bore, depending on specific engine series requirements for weight reduction and stress distribution.
- Weight
- Stock: Out of Stock - On Backorder
- Manufacturer Part #: 10-91423-8
- Part#: 10-91423-8
Aircraft Fitment Finder
Returns & refund summary
- 30-day return window — with prior return authorization, unopened in original packaging.
- Restocking fee: 20% on unopened items, 30% on open-box items.
- Refund processing fee: 5.51% applies to all refunds (returns, cancellations, core-fee refunds) regardless of reason.
- Return shipping: paid by buyer.
- Non-returnable categories: installed/used parts, special-order or rebuilt items, programmed items (incl. ELTs), batteries, AOG-priority orders, international orders.
Full terms: Return Policy.
Authenticity & authorization
All parts sold by American Aviation Parts are genuine factory products sourced through authorized distribution channels. Our authorization status varies by brand — for some brands we are a direct authorized dealer; for others we are an independent reseller through authorized distribution. Either way, the part you receive is the same factory product, with standard documentation available on request.
See our full Manufacturer Authorizations page for the current per-brand status.
Need traceability paperwork?
If your installation requires FAA Form 8130-3, manufacturer Certificate of Conformance, or other traceability documentation, please call 1-877-722-8727 or email [email protected] before placing the order so we can confirm what is available for this part.
Shipping
Standard ground, expedited, and AOG shipping options are available at checkout. Full shipping-cost tiers and timelines are published on our Delivery Information page.
