OMC Evinrude Johnson Hose

The part number 350983 appears to refer to an OMC fuel line hose, likely for Johnson or Evinrude outboards. These hoses are used to connect the fuel tank to the outboard engine and are typically made of durable, UV-resistant material like grey rubber. The hoses are designed to be flexible and withstand the vibrations of a boat engine. 

Here's a more detailed breakdown

OEM Vs. Aftermarket

Many fuel line hoses are offered as genuine OEM parts, meaning they are manufactured by the same company that makes the outboard Aftermarket fuel line hoses are also available.

Material and Construction

OEM fuel lines are typically made of high-quality rubber or similar materials designed for marine use. Some have internal reinforcement to prevent kinking.

Diameter

The diameter of the hose is a crucial factor in fuel flow. For outboards of 40hp and above a 3/8" diameter hose is generally recommended to ensure adequate fuel delivery, says ParSun. Smaller outboards may use 5/16 or smaller diameters. 

Priming

Fuel Lines are often paried with a priming bulb to help draw fuel into the engine when starting.

Connectors:

The hoses often include quick-disconnect fittings on both ends for ease of connection and removal. 

Warranty

Many OEM or aftermarket fuel lines come with a warranty, typically one year.