90 Amp Fuse Assembly – Fits MerCruiser 3.0L-8.2L Stern Drive Engines (Replaces 79023A91, 88-79023A91)

90 Amp Fuse Assembly – Fits MerCruiser 3.0L-8.2L Stern Drive Engines

This 90 Amp Starter and Alternator Fuse Assembly is designed for use with Mercury MerCruiser stern drive and inboard engines from 1983 to 2016, covering models ranging from 3.0L up to 8.2L. It serves as a direct fit replacement suitable for a variety of popular MerCruiser engine configurations.

The assembly directly replaces Mercury/MerCruiser part numbers 79023A91, 88-79023A91, and 8M0207795, as well as Sierra 18-8220 and Mallory 9-15510.

• Includes 1 x 90 Amp Starter Fuse Assembly
• Installation involves direct replacement with factory mounting
• Compatible with 4-stroke Mercury MerCruiser engines from 1983-2016

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x 90 Amp Starter Fuse Assembly

Installation Guide

1. Turn off all power and disconnect the battery before starting installation.
2. Locate the existing fuse assembly on your Mercury MerCruiser engine.
3. Remove the old fuse assembly by loosening the threaded stud terminals carefully.
4. Position the new 90 Amp fuse assembly in the factory mounting location.
5. Secure the fuse assembly using the original mounting hardware.
6. Tighten the threaded stud terminals firmly to ensure a solid electrical connection.
7. Reconnect the battery once installation is complete.
8. Turn on the engine and check for proper operation and any signs of electrical issues.

Troubleshooting & FAQ

• How do I confirm this fits my engine? Check the compatibility tables and verify your engine model, year, and OEM part number to ensure fitment.
• What are the differences versus the OEM part? This is an aftermarket replacement built to OEM specifications from comparable materials, not an OEM component.
• How often should I replace the fuse assembly? Replace the fuse if you notice electrical issues or during regular engine maintenance as advised by your mechanic.
• What are common signs of a fuse assembly failure? Symptoms include difficulty starting the engine, electrical faults, or blown fuses.
• OEM vs. Aftermarket? This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
• How fast do you ship and how much does it cost? We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
• What is your warranty and return policy? This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.