Sierra Oil Warning Module 18-99411 for Mercury/Mariner 2/3/4-Cylinder 2-Stroke Outboards, 1990-1999

The Sierra 18-99411 oil warning module is a replacement component for the oil injection system on Mercury and Mariner 2-stroke outboard engines. It is built for 2, 3, and 4 cylinder outboard and SportJet engines that use oil injection, covering model years 1990 through 1999. An oil warning module of this type monitors the oil injection system and signals an alert if the system detects a low oil condition, helping protect the engine from running with inadequate lubrication.

The module has a metal housing for durability in a marine engine compartment and is compact enough to fit into existing wiring and mounting locations on covered engines. It ships as a single unit and is identified for ordering purposes by Sierra part number 18-99411.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99411
• Compatible Engine Brand: Mercury/Mariner
• Engine Type: 2/3/4-cylinder 2-stroke outboard and SportJet engines with oil injection
• Model Years: 1990-1999
• Weight: 0.3 pounds
• Material: Metal
• Item Dimensions: 2 x 4 x 8 inches
• Number of Items: 1
• UPC: 808282394424

Fitment

• Mercury/Mariner 2/3/4-cylinder 2-stroke outboard and SportJet engines with oil injection, 1990-1999

Frequently Asked Questions

Which outboard engines fit the Sierra 18-99411 oil warning module? This module fits Mercury/Mariner 2/3/4-cylinder 2-stroke outboard and SportJet engines equipped with oil injection, for model years 1990 through 1999.

What does an oil warning module do? An oil warning module monitors the oil injection system on a 2-stroke outboard and triggers a warning signal if the system detects a low oil condition, which helps prevent engine damage from inadequate lubrication. The Sierra 18-99411 performs this function on covered Mercury/Mariner engines.

How much does the Sierra 18-99411 oil warning module weigh? It weighs 0.3 pounds.

What are the dimensions of this oil warning module? The Sierra 18-99411 measures 2 x 4 x 8 inches (L x W x H).

What material is the Sierra 18-99411 housing made of? The housing is made of metal.

Does this module work on 2-cylinder, 3-cylinder, and 4-cylinder outboards? Yes, the Sierra 18-99411 is designed for 2, 3, and 4 cylinder Mercury/Mariner 2-stroke outboard and SportJet engines with oil injection.

Is the oil warning module only for engines with oil injection? Yes, the Sierra 18-99411 is intended for Mercury/Mariner 2-stroke outboards and SportJet engines that use an oil injection system.

What is included when I order this part? One Sierra 18-99411 oil warning module ships as a single item.

Will this fit an outboard built before 1990 or after 1999? The Sierra 18-99411 is designated for Mercury/Mariner 2/3/4-cylinder 2-stroke outboard and SportJet engines from model years 1990-1999; fitment outside that range is not specified.

Who should install the Sierra 18-99411 oil warning module? Because it is part of the oil injection warning circuit, installation of the 18-99411 should be performed by a qualified marine technician familiar with your outboard's wiring and service procedures.