Sierra Ignition Coil 18-5433, Replaces Mercury Marine 32193A2, Fits GM 305/350/454 V-8 and Ford 302 Engines

The Sierra 18-5433 Ignition Coil is a conventional-ignition replacement coil built for inboard and sterndrive engines that use an external ballast resistor. It supplies the primary and secondary voltage needed to fire the spark plugs through the distributor, and is engineered as a direct cross-reference to the OEM coils used across a range of GM and Ford inboard engine families as well as certain outboard applications with conventional ignition. The coil is designed for use with an external resistor, delivering a primary resistance of 1550/450 Ohms and a secondary resistance of 9,370/7,650 Ohms, with an inductance rating of 645/531 MHY.

Installation is straightforward with a screw-in or bolt-on mounting style and a male connector for a secure electrical connection. Per manufacturer distributor cross-reference charts, the 18-5433 coil is specified for GM 3.8L 6-cylinder engines using distributor number IBM-7014A, GM 305/350/454 V-8 engines using distributor numbers IBM-7011 and IBM-7013, Mercury inboard distributor B64025A2, and Ford 302 V-8 engines using distributor numbers IBM-7007 and IBM-7007A. It is also referenced for Universal Atomic Four and Super Sabre applications, and for MCM 4-cylinder, V-6, and V-8 engines running conventional ignition, including some outboard applications. Weighing 1.51 pounds, this coil is a compact, reliable replacement for boat owners maintaining or restoring a conventional points-and-condenser style ignition system.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5433
• Weight: 1.51 pounds
• Item Dimensions: 0.39 x 0.39 x 0.39 inches
• Primary Resistance: 1550/450 Ohms
• Secondary Resistance: 9,370/7,650 Ohms
• Inductance: 645/531 MHY
• External Resistor: Required
• Connector Gender: Male
• Installation Type: Screw-In or Bolt-On
• Unit Count: 1 (Ignition Coil)
• UPC: 030999319326

Fitment

• 1984-88, 6 Cyl. 3.8L Engine, Distributor No. IBM-7014A
• 1973-74, 8 Cyl. Mercury Distributor No. B64025A2
• 1976-82, 8 Cyl. 305, 350, 454 Engine, Distributor No. IBM-7011
• 1983-88, 8 Cyl. 305, 350, 454 Engine, Distributor No. IBM-7013
• 1975-86, 8 Cyl. Ford 302 Engine, Distributor No. IBM-7007, IBM-7007A
• Universal: Atomic Four, Super Sabre
• MCM 4 Cyl., V-6 and V-8 engines with conventional ignition, and some outboard applications

Replaces (OEM)

• 38547
• 392-806529A1
• CRUSADER 37068
• MERCURY MARINE 32193A2
• OMC 915735
• 898253T24
• DELCO 1115202

Frequently Asked Questions

Does the Sierra 18-5433 ignition coil require an external resistor? Yes, the Sierra 18-5433 ignition coil requires an external resistor to operate and is not designed to run without one.

What is the primary and secondary resistance of the 18-5433 coil? The 18-5433 has a primary resistance of 1550/450 Ohms and a secondary resistance of 9,370/7,650 Ohms.

What engines is the Sierra 18-5433 ignition coil designed for? It is specified for GM 3.8L 6-cylinder engines (distributor IBM-7014A), GM 305/350/454 V-8 engines (distributor IBM-7011 or IBM-7013), Mercury inboard applications using distributor B64025A2, and Ford 302 V-8 engines (distributor IBM-7007/IBM-7007A), as well as Universal Atomic Four and Super Sabre engines.

Will this coil work with a 3.8L six-cylinder inboard engine? Yes, the 18-5433 ignition coil is listed for 1984-88 6-cylinder 3.8L engines using distributor number IBM-7014A.

Is the 18-5433 coil compatible with a 302 Ford marine engine? The Sierra 18-5433 is specified for 1975-86 Ford 302 8-cylinder engines using distributor numbers IBM-7007 and IBM-7007A.

What OEM part numbers does the 18-5433 ignition coil cross-reference? The Sierra 18-5433 cross-references to OEM numbers 38547, 392-806529A1, Crusader 37068, Mercury Marine 32193A2, OMC 915735, 898253T24, and Delco 1115202.

What connector type does this ignition coil use? The 18-5433 ignition coil has a male connector and installs with a screw-in or bolt-on mounting method.

How much does the Sierra 18-5433 ignition coil weigh? This ignition coil weighs 1.51 pounds.

What are the dimensions of the 18-5433 coil? The Sierra 18-5433 ignition coil measures 0.39 x 0.39 x 0.39 inches.

Does the 18-5433 coil work on outboard engines as well as inboards? It is listed for MCM 4-cylinder, V-6, and V-8 engines with conventional ignition, and the manufacturer notes it also applies to some outboard applications.

What is included when I order the 18-5433 ignition coil? The order includes one Sierra 18-5433 ignition coil as a single unit.

Is the 18-5433 a genuine Sierra part or aftermarket equivalent? The 18-5433 is a Sierra-branded ignition coil manufactured as a direct cross-reference replacement for the listed OEM coils, not a generic substitute.