Sierra Locator Ring 18-99544 for Johnson Evinrude 2 Cylinder Outboard Motors

The Sierra Locator Ring 18-99544 is a precision setting tool used to establish the correct sensor and stator charge coil air gap on Johnson and Evinrude 2 cylinder outboard motors. Proper air gap between the trigger/sensor components and the stator charge coils is essential for accurate ignition timing, and this locator ring provides a repeatable, consistent spacing reference so the gap can be set correctly during ignition system service, stator replacement, or general engine maintenance.

Designed as a purpose-built gauge rather than a general-purpose spacer, the locator ring removes the guesswork from manually measuring the sensor air gap with feeler gauges, helping technicians and boat owners restore the factory-specified clearance. It is intended for use on 2 cylinder Johnson and Evinrude outboard applications during ignition component servicing.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99544
• Application: Johnson Evinrude 2 Cylinder Outboard Motors
• Function: Sets sensor and stator charge coil air gap
• UPC: 808282395742
• Weight: 1.5 pounds

Fitment

• Johnson and Evinrude 2 cylinder outboard motors

Frequently Asked Questions

What is the Sierra 18-99544 locator ring used for? The Sierra 18-99544 locator ring is used to set the sensor and stator charge coil air gap on Johnson and Evinrude 2 cylinder outboard motors during ignition system service.

Which engines does the 18-99544 locator ring fit? This locator ring is designed for Johnson and Evinrude 2 cylinder outboard motors.

Why does the sensor air gap need to be set with a tool like this? Accurate ignition timing depends on a consistent gap between the sensor and the stator charge coils, and the 18-99544 locator ring provides a repeatable spacing reference so this gap is set correctly rather than estimated by hand.

How much does the Sierra 18-99544 locator ring weigh? It weighs 1.5 pounds.

Is this a wear part or a setting/service tool? The 18-99544 is a service tool (a locator ring) used to set the sensor and stator charge coil air gap rather than a running engine component.

Do I need this tool for a stator replacement on a 2 cylinder Johnson or Evinrude? Yes, when replacing or servicing the stator or sensor on a 2 cylinder Johnson or Evinrude outboard, the 18-99544 locator ring helps set the correct air gap during reassembly.

Is the Sierra 18-99544 an OEM part or an aftermarket replacement? The 18-99544 is sold under the Sierra brand as the part number for this locator ring.

What comes with the Sierra 18-99544? The product is the locator ring itself, used as a setting gauge for the sensor and stator charge coil air gap on applicable 2 cylinder outboard motors.

Can this locator ring be used on more than 2 cylinder models? The Sierra 18-99544 locator ring is intended for Johnson and Evinrude 2 cylinder outboard motors.

What identifies this part when ordering? Order by Sierra part number 18-99544, described as the Locator Ring for Johnson Evinrude 2 cylinder outboard applications.