Sierra Ignition Module 18-5107-1, Replaces 7243110, for GM 4 Cyl. And V-8 3.0L (1991 & Up), 5.7L & 7.4L EFI (1995 & Up)

The Sierra 18-5107-1 Ignition Module is a marine ignition control unit built for GM 4 cylinder and V-8 sterndrive and inboard engines running Delco HEI ignition. It is engineered to meet the demands of high-horsepower marine engines and to hold up in the harsh marine operating environment, matching or exceeding the performance of the original equipment module it replaces.

This module is designed for engines including the 3.0L (1991 and up) and the 5.7L and 7.4L EFI (1995 and up). It directly replaces OEM part number 7243110, making it a straightforward swap for boat owners and marine technicians servicing GM-based Delco HEI ignition systems. The housing has a machined exterior finish and the module is compact, making installation in tight engine compartments manageable.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-5107-1
• Product Type: Ignition Module
• Engine Compatibility: 4 Cyl. And V-8
• Fitment: 3.0L (1991 and up); 5.7L and 7.4L EFI (1995 and up)
• Ignition System: Delco HEI Ignition
• Exterior Finish: Machined
• Product Dimensions: 0.39 x 0.39 x 0.39 inches
• Weight: 0.15 pounds
• UPC: 808282145330

Fitment

• GM 4 Cyl. And V-8 engines with Delco HEI ignition
• 3.0L engines (1991 and up)
• 5.7L and 7.4L EFI engines (1995 and up)

Replaces (OEM)

• 7243110

Frequently Asked Questions

What engines does the Sierra 18-5107-1 ignition module fit? The Sierra 18-5107-1 fits GM 4 cylinder and V-8 marine engines with Delco HEI ignition, including 3.0L engines (1991 and up) and 5.7L and 7.4L EFI engines (1995 and up).

What OEM part number does the 18-5107-1 replace? It replaces OEM ignition module 7243110, so it is a direct swap on engines originally fitted with that part.

Is the Sierra 18-5107-1 compatible with Delco HEI ignition systems? Yes, the module is built specifically for GM engines running Delco HEI (High Energy Ignition) systems.

How much does the ignition module weigh? The Sierra 18-5107-1 ignition module weighs 0.15 pounds.

What are the dimensions of the 18-5107-1 ignition module? It measures 0.39 x 0.39 x 0.39 inches.

What finish does the housing have? The 18-5107-1 has a machined exterior finish on its housing.

Will this module work on a 3.0L marine engine? Yes, the Sierra 18-5107-1 is designed to fit 3.0L engines from model year 1991 and up.

Does the 18-5107-1 fit 5.7L and 7.4L EFI engines? Yes, it fits 5.7L and 7.4L EFI engines from 1995 and up, in addition to the 3.0L application.

Is the Sierra ignition module a genuine replacement or aftermarket equivalent? The 18-5107-1 is a Sierra-manufactured replacement module built to meet or exceed the performance of the original equipment part it replaces, OEM number 7243110.

What is the UPC for the Sierra 18-5107-1 ignition module? The UPC for the Sierra 18-5107-1 ignition module is 808282145330.

Does this ignition module fit 4 cylinder engines only? No, the Sierra 18-5107-1 covers both 4 cylinder and V-8 GM engines equipped with Delco HEI ignition, not just 4 cylinder applications.