# 3859078 Ignition Coil | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta ignition coil from the Ignition and Control Systems group, weighing 0.290 kg and listed for 77 applications on the DPX series.

## 🚤 Compatibility

-   **Engine Family:** DPX

Full model list at the end of this description.

## ⚙️ Key Features

-   0.290 kg
-   77 applications on the DPX series
-   Ignition and Control Systems group
-   8 used per assembly

## 🔌 Function

Steps battery voltage up to the tens of thousands of volts needed to jump the plug gap, storing energy in its primary winding and releasing it when the circuit is broken.

## ⚠️ Common Signs of Failure

-   No spark, or spark lost once the engine has warmed up
-   Misfire under load or at higher engine speeds
-   Hard starting, or the engine cutting out then restarting when cool
-   Coil body cracked, swollen or leaking, or smelling hot
-   Tracking marks or arcing around the high-tension tower

## 🛠️ Service Notes

-   Check the coil feed, earth and the trigger circuit before condemning the coil - a bad earth mimics a failed coil
-   Ignition module 3858984 and cooling plate 3858985 are the switching side of the ignition on other engines in this range
-   High-tension ignition carries a serious shock risk - isolate the battery before working on it

## 🔄 Supersession & Cross Reference

### Other-Brand OEM Numbers

-   MerCruiser: 392-889925
-   MerCruiser: 8M0178581

### Aftermarket / Verified Equivalents

-   Recmar: REC3859078
-   Sierra: 18-7493
-   Mallory Marine: 9-29710
-   CDI Electronics: E18-0007

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta 8.1Gi-C, 8.1Gi-CF, 8.1GiC-J, 8.1GiC-JF, 8.1GiCE-JF, 8.1GiCE-J, 8.1GiCE-P, 8.1GiC-Q, 8.1GiCE-Q, 8.1Gi-D, 8.1Gi-DF, 8.1Gi-E, 8.1Gi-EF, 8.1GiE-JF, 8.1GiE-J, 8.1GiE-KF, 8.1GiE-K, 8.1GiE-MF, 8.1GiE-P, 8.1Gi-F, 8.1Gi-FF, 8.1Gi-G, 8.1Gi-GF, 8.1Gi-H, 8.1Gi-HF, 8.1GiI-C, 8.1GiI-D, 8.1GiI-E, 8.1GiI-F, 8.1GiI-G, 8.1GiI-H, 8.1Gi-J, 8.1Gi-JF, 8.1GXi-B, 8.1GXi-BF, 8.1GXi-C, 8.1GXi-CF, 8.1GXi-D, 8.1GXi-DF, 8.1GXi-E, 8.1GXi-EF, 8.1GXiE-JF, 8.1GXiE-J, 8.1GXiE-K, 8.1GXiE-KF, 8.1GXiE-P, 8.1GXi-F, 8.1GXi-FF, 8.1GXi-G, 8.1GXi-GF, 8.1GXiI-B, 8.1GXiI-C, 8.1GXiI-D, 8.1GXiI-E, 8.1GXiI-F, 8.1GXiI-G, 8.1GXi-J, 8.1GXi-JF, 8.1IPSCE-JF, 8.1IPSCE-MF, 8.1IPSCE-P, 8.1IPSCE-Q, 8.1IPSE-JF, 8.1OSi-A, 8.1OSi-AF, 8.1OSi-B, 8.1OSi-BF, 8.1OSi-C, 8.1OSi-CF, 8.1OSi-D, 8.1OSi-DF, 8.1OSi-J, 8.1OSi-JF, 8.1OSiE-JF, 8.1OSiE-J
-   Volvo Penta DPX375-CF
-   Volvo Penta DPX420-CF

## Details

- **Price:** 265.79 AUD
- **Vendor:** Volvo Penta
- **Type:** Ignition & Controls
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 265.79 AUD | In stock |

## Images

- 3859078 Ignition Coil | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3859078-ignition-coil-genuine-volvo-penta)
> Updated: 2026-09-06