Sierra Ignition Coil - SIE-18-5438

Sierra 18-5438 Ignition Coil for Thunderbolt MerCruiser & Crusader Ignitions

Sierra replacement ignition coil. All Sierra aftermarket parts are manufactured to meet or exceed OEM requirements.

Fits:

GM V-6 & V-8 Engines With HEI Thunderbolt IV & V Ignition

Features:

Primary Resistance: 1.0±15 ohms

Secondary Resistance: 8K±20 ohms

Shape: Cannister

Input Voltage: 14+0.5V

Output Voltage: MIN16.5KV

Primary Resistance Tolerance: +15%

Secondary Resistance Tolerance: +15%

Primary Inductance: 7.85mH+20%

Secondary Inductance: 36.8H+20%

Interchangeable with:

CDI

E18-0008

Crusader

37068

Mallory

9-29701

MerCruiser Stern Drive

300-8M0079202

392-7803

392-7803A4

392-805570A1

392-805570A2

Frequently Asked Questions

• What is the Sierra 18-5438 Ignition Coil used for? The Sierra 18-5438 Ignition Coil is a replacement coil for GM V-6 and V-8 marine engines equipped with HEI Thunderbolt IV or V ignition systems. It is manufactured by Sierra to meet or exceed OEM requirements and is designed for the ignition applications specified in the product description.
• Which engines does the Sierra 18-5438 Ignition Coil fit? The Sierra 18-5438 fits GM V-6 and V-8 engines with HEI Thunderbolt IV and V ignition. The product description does not provide specific engine model years or serial-number ranges, so verify that your engine uses the specified HEI Thunderbolt IV or V ignition system before ordering.
• What are the resistance specifications for the Sierra 18-5438 Ignition Coil? The Sierra 18-5438 has a listed primary resistance of 1.0±15 ohms and secondary resistance of 8K±20 ohms. The product description also lists primary inductance of 7.85mH+20% and secondary inductance of 36.8H+20% as part of the coil's specifications.
• What are the voltage specifications for the Sierra 18-5438 Ignition Coil? The Sierra 18-5438 has an input voltage specification of 14+0.5V and a minimum output voltage of 16.5KV. These specifications are provided for the replacement ignition coil used with GM V-6 and V-8 engines equipped with HEI Thunderbolt IV and V ignition.
• What type of ignition coil is the Sierra 18-5438? The Sierra 18-5438 is a cannister-shaped replacement ignition coil. Its listed specifications include primary resistance of 1.0±15 ohms, secondary resistance of 8K±20 ohms, primary inductance of 7.85mH+20%, and secondary inductance of 36.8H+20%.
• What ignition coil part numbers is the Sierra 18-5438 interchangeable with? The Sierra 18-5438 is interchangeable with CDI E18-0008, Crusader 37068, and Mallory 9-29701. Listed MerCruiser Stern Drive interchange numbers include 300-8M0079202, 392-7803, 392-7803A4, 392-805570A1, and 392-805570A2. Verify your existing part number and ignition system before replacement.