# 3910582 Cummins 4BT / A3.9 Heat Exchanger 3910582 Replacement

Aftermarket heat exchanger for Cummins 4 Cylinder 4BT marine engines.

Replaces Cummins 3910582 .

4" Diameter x 16.25" long shell, copper nickel core Replacement for Cummins part #3910582. Raw Water Inlet/Outlet: 1.25". 3910582 equivalent to Sen-Dure 9445-1-7.

Copper Nickel bundle for superior resistance to corrosion.

This is a Mr Cool (USA) marine part MRC3910582CN.

## Details

- **Price:** 1260.0 AUD
- **Vendor:** Mr Cool
- **Tags:** Sawley’s AAM Aftermarket – Cooling Systems Mr Cool | Marine Heat Exchangers & Kits

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1260.00 AUD | In stock |

## Images

- 3910582 Cummins 4BT / A3.9 Heat Exchanger 3910582 Replacement
- 3910582 Cummins 4BT / A3.9 Heat Exchanger 3910582 Replacement
- 3910582 Cummins 4BT / A3.9 Heat Exchanger 3910582 Replacement
- 3910582 Cummins 4BT / A3.9 Heat Exchanger 3910582 Replacement

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3910582-cummins-4bt-a3-9-heat-exchanger-3910582-replacement)
> Updated: 2026-06-23