Sierra 18-99538 Threaded Gearcase Filler Nozzle - Fits Tohatsu Outboards, Equivalent to CDI Electronics 551-33TN

The Sierra 18-99538 Threaded Gearcase Filler Nozzle is a threaded fill nozzle used for adding gear lubricant to an outboard lower unit gearcase. It threads onto a standard gear oil bottle, letting you dispense oil directly into the gearcase fill port without the mess of a loose spout or funnel. This is a simple, purpose-built specialty tool for routine outboard gearcase oil changes and top-offs, a maintenance task most outboard owners perform themselves rather than through a dealer service department. The nozzle is compatible with Tohatsu outboard engines and is equivalent to the CDI Electronics part number 551-33TN, so it can be used as a direct replacement or spare for that part. Because it is a threaded fitting rather than a friction-fit spout, it seats securely on the oil bottle during use, reducing spills and letting you control the flow as you fill the gearcase to the proper level. Its compact size and light weight make it easy to keep in a toolbox or tackle bag alongside other routine maintenance tools.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99538
• Product Name: Threaded Nozzle
• Category: Specialty Tools
• Weight: 0.1 pounds
• UPC: 808282394936
• Cross Reference: CDI Electronics 551-33TN

Fitment

• Tohatsu outboard engines

Replaces (OEM)

• CDI Electronics 551-33TN

Frequently Asked Questions

What is the Sierra 18-99538 nozzle used for? It is a threaded gearcase filler nozzle used to add gear lubricant to an outboard lower unit gearcase during routine oil changes or top-offs.

Does the 18-99538 nozzle fit Tohatsu outboards? Yes, the Sierra 18-99538 threaded nozzle is compatible with Tohatsu outboard engines.

Is this the same as the CDI Electronics 551-33TN nozzle? Sierra part 18-99538 is equivalent to CDI Electronics part number 551-33TN, so it can be used in place of that part.

How much does the 18-99538 nozzle weigh? The Sierra 18-99538 threaded gearcase filler nozzle weighs 0.1 pounds.

How does the nozzle attach during use? It threads directly onto a gear oil bottle, giving a secure connection for dispensing oil into the gearcase fill port instead of relying on a loose-fitting spout.

What category of tool is the 18-99538? The Sierra 18-99538 is classified as a specialty tool, specifically a threaded gearcase oil filler nozzle.

Can this nozzle be used with any gear oil bottle? The Sierra 18-99538 is a threaded nozzle designed to thread onto a gear oil bottle for filling an outboard gearcase; it is not a universal friction-fit spout.

What is included with the Sierra 18-99538? This listing includes one Sierra 18-99538 threaded gearcase filler nozzle.

Is the 18-99538 nozzle genuine Sierra or aftermarket? The 18-99538 is a Sierra branded part, sold under Sierra's own part number as a direct equivalent to the CDI Electronics 551-33TN nozzle.

What UPC is associated with the Sierra 18-99538? The Sierra 18-99538 threaded gearcase filler nozzle carries UPC 808282394936.