898253T27 Ignition Coil for Mercruiser Mercury OMC Volvo Penta Crusader | JLM Marine

898253T27 Ignition Coil for Mercruiser Mercury OMC Volvo Penta Crusader

This high-quality aftermarket ignition coil is engineered for Mercruiser, Mercury, OMC, Volvo Penta, and Crusader marine engines. Designed for use with Delco EST ignition systems, it fits GM inline 4-cylinder, V6, and V8 applications including popular displacements such as 3.0L, 4.3L, 5.0L, 5.7L, 7.4L, and 8.2L engines (262, 305, 350, 377, 454 cubic inch models).

This coil directly replaces OEM part numbers 898253T27 (Mercruiser/Mercury), 817378T (OMC), 3854002 and 3854002-7 (Volvo Penta), and 7243200 (Crusader), ensuring broad cross-brand compatibility for your ignition system needs.

• Fits 4, 6, and 8 cylinder marine engines with Delco EST systems
• Mounting holes designed for 1/4" bolts (enlargement may be needed for larger bolts)
• Suitable for popular Mercruiser applications including EFI, MPI, TBI, MAG, Black Scorpion, and Horizon series

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.

Technical Specifications

Package Contents

• 1 × Ignition Coil

Note: Mounting holes are designed for 1/4" bolts. If your application requires larger bolts, you may need to enlarge the holes or select a different coil.

Installation Guide

1. Disconnect the battery: Remove the negative terminal to prevent electrical shock or short circuits.
2. Locate the existing ignition coil: It is typically mounted near the distributor on the engine block.
3. Disconnect electrical connectors: Carefully unplug the primary and secondary wire terminals from the old coil.
4. Remove mounting bolts: Use a socket wrench to unbolt the old coil from its bracket (typically 1/4" bolts).
5. Inspect mounting holes: If your application uses larger bolts, you may need to enlarge the holes on the new coil carefully.
6. Position the new coil: Align the new ignition coil with the mounting bracket and secure with appropriate bolts.
7. Reconnect electrical terminals: Attach the primary and secondary wires to the corresponding terminals on the new coil. Ensure connections are snug and corrosion-free.
8. Double-check all connections: Verify that wiring is correct and terminals are secure before proceeding.
9. Reconnect the battery: Reattach the negative terminal.
10. Test engine start: Start the engine and listen for smooth ignition. Check for misfires or irregular operation.
11. Inspect for arcing or loose connections: With the engine running, visually confirm no sparking around terminals or wires.
12. Secure all components: Ensure the coil is firmly mounted and all wiring is routed away from hot or moving parts.

Troubleshooting & FAQ

Q: How do I confirm this ignition coil fits my engine?
A: Cross-reference your current part number with the numbers listed in our Part Number Cross-Reference table (898253T27, 817378T, 3854002, 3854002-7, 7243200). Also confirm your engine uses a Delco EST ignition system and matches one of the compatible models listed above.

Q: My mounting bolts are larger than 1/4". Will this coil work?
A: The coil is designed with 1/4" mounting holes. If your application requires larger bolts, you may carefully enlarge the holes with a drill, or consider purchasing a coil with larger pre-drilled holes to avoid modification.

Q: What are the signs that my ignition coil is failing?
A: Common symptoms include engine misfires, rough idle, difficulty starting, reduced power or acceleration, poor fuel economy, and the check engine light illuminating. If you experience these issues, testing or replacing the ignition coil is a good troubleshooting step.

Q: How often should I replace my ignition coil?
A: Ignition coils typically do not have a fixed replacement interval and are replaced as needed when they fail. Regular inspection during tune-ups and prompt replacement at the first sign of failure will help maintain engine performance and reliability.

Q: Is this an OEM part or aftermarket?
A: 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.

Q: How fast do you ship and how much does it cost?
A: 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.

Q: What is your warranty and return policy?
A: 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.