OEM Quicksilver MerCruiser 496 / 8.1L Heat Exchanger – 863903A01
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Description
Description
Quicksilver 863903A01 is an OEM heat exchanger for selected MerCruiser 496 MAG and 8.1L closed-cooling systems.
Product details
- Manufacturer part number: 863903A01.
- Heat exchanger assembly.
- Cataloged on selected 496 MAG sterndrive and 8.1L inboard engines.
- Replaces 863903T and 861945T in applicable diagrams.
- Crossover seals, mounting pads and clamps are separately identified service parts.
Fitment and selection
Verify the engine serial number and closed-cooling diagram. Match the exchanger connections and mounting arrangement to the specified part.

