431-1890 - MK Products 7-Inch Jump Liner for Tweco Power Pins

Smooth Wire Feeding Starts at the Connection

Keep your MIG gun running at peak performance with the MK Products 431-1890 Power Pin Liner. If you are running an MK Cobra, Python, or Prince XL gun with a Tweco-style back-end connection, this 7-inch jump liner is a small but mighty part of your setup. It sits inside the power pin connector, acting as the initial guide for your welding wire as it leaves the feeder. A worn or kinked jump liner is a common, often overlooked culprit for erratic wire feeding and frustration on the job.

Designed specifically for Tweco-style adapters, this liner ensures that your wire has a smooth, protected path right from the start. It prevents the wire from rubbing against the metal of the adapter, reducing drag and preventing shavings that can clog your main liner downstream. Whether you are pushing steel or aluminum, maintaining this transition point is key to preventing birdnests and ensuring a stable arc.

Why replace your jump liner?

• Prevent Feed Issues: Eliminates friction points at the feeder connection.
• Protect Your Wire: Stops wire shaving and deformation before it enters the cable.
• Easy Maintenance: Simple to swap out during routine gun cleaning or liner changes.

Don't let a cheap consumable compromise your weld quality. The MK 431-1890 is a genuine replacement part that restores the factory-spec performance of your equipment. Keep a few in your toolbox to ensure you are never stuck with a feeding problem in the middle of a project.