EST Marine Ignition Distributor for GM 2.5L 3.0L Engines
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Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Marine GM 2.5L and 3.0L EST ignition systems used in selected MerCruiser, OMC and Volvo Penta installations
Applications shown may depend on the installed engine, equipment configuration, and serial range. Confirm the original part before ordering.
Product Overview
A failed distributor can cause intermittent spark, hard starting or misfire. This replacement is intended for compatible marine electronic spark-timing arrangements—not standard automotive or points-ignition setups.
Key Features & Performance
- Part type: EST Marine Ignition Distributor
- Intended applications: Marine GM 2.5L and 3.0L EST ignition systems used in selected MerCruiser, OMC and Volvo Penta installations
- Reference number(s) to match: 817377, 986653
OE / Reference Numbers
- 817377
- 986653
Common Reasons for Replacement
Distributor shaft wear; faulty pickup or housing; ignition diagnosis points to the distributor assembly.
Fitment & Installation Notes
Confirm marine engine model, EST ignition system, drive gear, cap/rotor configuration and 817377 / 986653 interchange.
Frequently Asked Questions
How do I confirm this is the correct part? Confirm marine engine model, EST ignition system, drive gear, cap/rotor configuration and 817377 / 986653 interchange.
Is this a genuine OEM part? No. This listing describes an aftermarket replacement unless the individual product is specifically identified as genuine OEM.
Part Summary
keywords: EST Marine Ignition Distributor, 817377, 986653, Marine GM 2.5L and 3.0L EST ignition systems used in selected MerCruiser, OMC and Volvo Penta installations
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.