Mercury MerCruiser Delco HEI Distributor Ignition Module 811637001

Mercury MerCruiser 811637001 is a genuine OEM distributor ignition module for Delco HEI ignition systems. Current Mercury dealer supersession references show 811637001 replaced by 8M6008208, and the current replacement is described as an Ignition Module Distributor Delco for GM-based MerCruiser engines using Delco HEI ignition.

Key Features

• Genuine Mercury Marine OEM part number 811637001, superseded to 8M6008208.
• Current replacement is specifically identified as a Delco HEI distributor ignition module.
• Fits GM 4-cylinder, V6, and V8 engines with Delco HEI ignition according to current Mercury dealer references.
• Current dealer listing shows GTIN 678633123078 for 8M6008208.
• Current shipping specs for the replacement are approximately 0.17 lb, 3.88 in. x 3.63 in. x 1.75 in.

Engine Compatibility

The strongest supportable fitment for 811637001 / 8M6008208 is MerCruiser GM-based 4-cylinder, V6, and V8 engines with Delco HEI ignition. Current Mercury dealer where-used references tie this module to applications including 3.0L GM 181 I/L4, while related Mercury and dealer references also place the same ignition-module family in 350 MAG MPI Ski, 500 EFI, and 575 SCi applications depending on serial range and distributor setup.

Serial Number Fitment Notice

Verify fitment by exact engine serial number and the correct distributor / ignition components parts diagram before ordering. With this part, the key match is the Delco HEI distributor system, because similar MerCruiser ignition parts can differ by distributor type, year range, and ignition-control setup.

When This Part Needs Replacement

This module is typically replaced when the ignition system loses spark, becomes intermittent, or diagnosis points to a failed distributor ignition module in the Delco HEI system. That guidance is a practical service inference based on the part’s documented function as the distributor ignition module in the MerCruiser ignition assembly.

Installation Notes

Install this part only after confirming the correct MerCruiser distributor and ignition layout for the engine being serviced. Current distributor component diagrams place the replacement 8M6008208 in the same Delco HEI distributor assembly with related parts such as cap 811635T3 or 808483T3, rotor 8M6001254 / 8M6001252, coil 811639T, and distributor hardware.

Alternate/Superseded Part Numbers

Current Mercury supersession references show 8M6008208 as the replacement for 811637001. Related earlier Mercury module numbers in this same supersession family include 811637, 811637T, and 811637002.

Parts Desk Insight

With distributor modules like this, the important match is the ignition system type, not just the engine size. Confirming that the engine uses a Delco HEI distributor before ordering is the easiest way to avoid getting the wrong ignition module.

Shipping: Ships same or next day for fast Canada wide shipping.