Sierra Threaded Nozzle 18-99543 for Pressure and Vacuum Tester

The Sierra 18-99543 is a threaded nozzle designed as a replacement accessory for pressure and vacuum testing equipment used in marine engine service. It threads securely onto a compatible tester body, allowing technicians to apply and hold pressure or vacuum on fuel system and cooling system components during diagnostic checks. Because it is a small, low-cost wear item, it is a practical part to keep on hand so a tester does not sit idle waiting on a lost or damaged nozzle.

This nozzle is sized for a threaded connection, letting it seat firmly on the tester without slipping under pressure, which helps keep readings accurate during leak-down and pressure testing procedures. At just 0.1 pounds, it adds negligible weight to a tool kit or tackle box, making it easy to store as a spare alongside other diagnostic accessories.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99543
• Product Type: Threaded Nozzle
• Application: Pressure and Vacuum Tester Accessory
• Weight: 0.1 pounds
• UPC: 808282395759

Frequently Asked Questions

What is the Sierra 18-99543 used for? The Sierra 18-99543 is a threaded nozzle that attaches to a pressure and vacuum tester, letting the tester hold pressure or vacuum on a fuel or cooling system component during a diagnostic check.

How does the 18-99543 nozzle attach to the tester? It uses a threaded connection that screws onto the tester body, which helps it stay seated and hold a consistent seal while pressure or vacuum is applied.

How much does the Sierra 18-99543 weigh? It weighs 0.1 pounds, making it a lightweight accessory that is easy to store as a spare with other testing tools.

Is the 18-99543 sold as a single nozzle or a full tester kit? The 18-99543 is the threaded nozzle component itself, sold as a replacement or spare part rather than a complete tester kit.

Why would someone need a spare threaded nozzle like the 18-99543? Nozzles on pressure and vacuum testers are small parts that can be lost or damaged with regular shop use, so having a Sierra 18-99543 on hand keeps a tester ready for use without downtime.

What brand is the 18-99543 nozzle? It is manufactured by Sierra and identified by part number 18-99543.

Does the 18-99543 nozzle require any tools to install? No special tools are needed; the Sierra 18-99543 threads onto the tester body by hand.

Is the Sierra 18-99543 a genuine Sierra part? Yes, the 18-99543 is a genuine Sierra part number, not a generic substitute.