Lycoming

Aviation Part 1853917

P/N 1853917

NE — New Condition disclosed

Condition NE — Condition disclosed — is shown up front on this listing, along with the exact price, current availability, and what certification paperwork ships with the part, so you can confirm fit and airworthiness before you buy. Full specifications and answers to common questions are below.

Sold by AAP

What does “New” condition mean?

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On backorder

UOM EA · MOQ 1

Paperwork shown up front · 30-day returns · secure checkout

Request certification documents (8130-3 / EASA Form 1 / C of C)

Description

Overview

The **Lycoming Fuel Injector Nozzle Assembly (P/N 1853917)** is a precision component integral to the fuel injection system of Lycoming IO-720 series aircraft engines. This assembly is responsible for atomizing and directing the precisely metered fuel into the intake port of each cylinder, ensuring optimal fuel-air mixture distribution for efficient combustion. Its proper function is critical for engine power output, fuel economy, and smooth operation across all power settings, from idle to full throttle. This specific part, 1853917, plays a vital role in the engine's ability to achieve its rated performance and maintain consistent combustion, directly impacting flight safety and operational reliability.

Specifications

While exact dimensions and material compositions can vary slightly between production batches or specific engine configurations, the Lycoming Fuel Injector Nozzle Assembly (P/N 1853917) typically exhibits the following characteristics:

Weight: Approximately 0.05 - 0.1 lbs (23 - 45 grams) per unit, designed for minimal contribution to engine weight.
Overall Length: Typically 1.5 - 2.0 inches (38 - 51 mm), including the threaded portion and nozzle tip.
Diameter (Body): Approximately 0.375 - 0.500 inches (9.5 - 12.7 mm).
Material: Constructed from corrosion-resistant stainless steel and brass alloys for durability and resistance to fuel contaminants and high temperatures.
Orifice Size: Precisely machined to specific flow rates, critical for engine calibration. This can vary by cylinder position or engine variant.
Connection Type: Features a standardized AN-threaded fitting for connection to the fuel manifold lines.
Finish: Natural metallic finish, free from coatings that could flake or contaminate the fuel system.

Specifications

Part number	1853917
Manufacturer	Lycoming
Condition	NE
Airworthiness	Condition disclosed
Country of origin	—
Lead time	days

Frequently asked

Does the Aviation Part 1853917 include certification paperwork?

This item is supplied as "Condition disclosed" rather than with full 8130-3 traceability — normal for some condition codes, and it does not mean the part is unusable, only that the paperwork profile differs. Check the listing for exactly what documentation is included, and request any available records before you purchase if your installation requires them.

What condition is this part?

This part is listed in condition NE — Condition disclosed. Condition codes describe how a part reached its current state (for example new, overhauled, serviceable, repaired, or as-removed) and directly affect what paperwork ships with it and how it should be installed. See the Glossary for the full definition of every condition code we use.

How fast does it ship?

This item is currently on backorder, meaning demand has temporarily outpaced our stock and a new shipment is inbound from the manufacturer or our supplier. Request a quote and we will confirm the current estimated delivery window before you commit. If your aircraft is grounded, AOG expedited handling is available on request.

Can I return it?

You may return this item within 30 days of delivery if it is unopened, uninstalled, and in its original packaging. Items that have been installed, powered on, opened hazmat, or separated from an attached 8130-3 tag are non-returnable because their airworthiness status can no longer be confirmed once removed from the part. See our Returns policy for the full process.