Sierra Ballast Resistor 2.5 Ohm for Johnson Evinrude Outboard Ignition Systems (18-99381)

The Sierra 18-99381 is a 2.5 Ohm ballast resistor built for the Johnson Evinrude outboard electrical system. A ballast resistor is wired into the ignition circuit to regulate current flow to the coil, helping protect ignition components from excess voltage during operation. This resistor is a compact, lightweight component at just 0.3 pounds, making it a straightforward part to keep on hand for outboard electrical system service and repair. It is identified by Sierra part number 18-99381 and UPC 808282399269, so it can be ordered and verified with confidence. As an electrical system component, it is intended to be installed by someone familiar with outboard ignition wiring, matching the resistor into the existing circuit in place of a resistor of the same 2.5 Ohm rating.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99381
• Resistance: 2.5 Ohm
• Category: Johnson Outboard Electrical System
• Weight: 0.3 pounds
• UPC: 808282399269

Frequently Asked Questions

What is the Sierra 18-99381? It is a 2.5 Ohm ballast resistor for the Johnson Evinrude outboard electrical system, identified by Sierra part number 18-99381.

What resistance value does this ballast resistor have? The Sierra 18-99381 ballast resistor is rated at 2.5 Ohm.

How much does the 18-99381 ballast resistor weigh? This ballast resistor weighs 0.3 pounds.

What brand is part number 18-99381? Part number 18-99381 is manufactured by Sierra.

What system is the 18-99381 resistor designed for? The 18-99381 is built for the Johnson Evinrude outboard electrical system.

What does a ballast resistor do in an outboard ignition system? A ballast resistor is wired into the ignition circuit to regulate current reaching the coil, which helps manage voltage during engine operation.

Is there a UPC I can use to verify the 18-99381 resistor? Yes, the Sierra 18-99381 ballast resistor carries UPC 808282399269.

Is the 18-99381 resistor a small, lightweight part? Yes, at 0.3 pounds it is a compact component of the outboard electrical system.

Can I use the 18-99381 resistor as a replacement in the ignition circuit? The Sierra 18-99381 is a 2.5 Ohm ballast resistor intended for use in the Johnson Evinrude outboard electrical system in place of a resistor of the same rating.

How is the 18-99381 ballast resistor categorized? It is listed under Johnson Outboard Electrical System, reflecting its role in the ignition circuit of Johnson Evinrude outboards.