MerCruiser and Volvo Penta | Recmar
Delco EST Ignition Module for MerCruiser, Volvo Penta & OMC - REC3854003
REC3854003
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Product Specifications and Features
REC3854003 is a Recmar replacement ignition module for marine GM engines fitted with Delco EST electronic distributor ignition. It is used across many MerCruiser, Volvo Penta and OMC stern drive and inboard petrol engines.
This module replaces the common Volvo Penta 3854003 and MerCruiser 811637 ignition module family. It is intended for Delco EST / Delco HEI-style marine distributor systems used on compatible 4-cylinder, V6 and V8 engines.
It is not a Thunderbolt ignition module and it is not an ECM/PCM control unit.
Key Specifications
| Spec | Details |
|---|---|
| Recmar SKU | REC3854003 |
| Product type | Ignition control module |
| Ignition system | Delco EST / Delco HEI-style marine distributor |
| Engine type | GM marine petrol engines |
| Cylinder applications | 4-cylinder, V6 and V8 |
| Main OEM reference | Volvo Penta / OMC 3854003 |
Engine Compatibility
| Engine family | Models / applications | Notes |
|---|---|---|
| GM 3.0L 4-cylinder | MerCruiser, Volvo Penta, OMC applications with Delco EST | Distributor-module applications only |
| GM 4.3L V6 | MerCruiser, Volvo Penta, OMC applications with Delco EST | Match by ignition system and OEM number |
| GM small block V8 | 5.0L / 5.7L applications with Delco EST | Not for Thunderbolt ignition |
| GM big block V8 | 7.4L / 8.2L applications with Delco EST | Use where 3854003 / 811637 module is specified |
OEM and Cross References
| Brand | Part number | Notes |
|---|---|---|
| Recmar | REC3854003 | Aftermarket replacement |
| Volvo Penta | 3854003 | OEM reference |
| OMC / Johnson / Evinrude | 3854003 | OEM reference |
| MerCruiser | 811637 | OEM reference |
| MerCruiser | 811637T | OEM reference |
| MerCruiser | 811637001 | OEM reference |
| MerCruiser | 8M0123099 | Replacement reference |
| MerCruiser | 8M6008208 | Replacement reference |
| Sierra | 18-5107-1 | Aftermarket equivalent |
| Crusader / PCM | R116014 | Cross reference |
Attributes
| Field | Value |
|---|---|
| Brand | Recmar |
| MPN | REC3854003 |
| Product category | Marine Ignition Module |
| Fits brand | MerCruiser, Volvo Penta, OMC |
| Fits ignition system | Delco EST |
| Replaces OEM | 3854003, 811637, 811637T |
| Condition | New |
Important Fitment Notes
| Check before ordering | Why it matters |
|---|---|
| Delco EST distributor | This module is only for engines using the Delco EST ignition layout |
| Thunderbolt ignition | MerCruiser Thunderbolt systems use different ignition components |
| ECM/PCM systems | This part is the distributor module, not the engine computer |
| OEM number | The safest fitment route is matching 3854003, 811637 or 18-5107-1 |
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