Mercury 879312T78 Keyswitch Harness – OEM 30 ft Extension Harness, No Crank

$66.99 $95.00
Shipping calculated at checkout.

Description and Details

The Mercury 879312T78 Keyswitch Harness is a genuine OEM Mercury Marine extension harness designed with a 30 ft length and No Crank function. This key switch harness provides secure electrical connections and reliable signal transmission for extended control configurations on Mercury and MerCruiser systems.

Built with marine-grade, corrosion-resistant materials, the 879312T78 harness ensures dependable performance in harsh marine environments. Perfect for long-run installations, this harness maintains OEM-level reliability and fit, making it ideal for boats requiring extended key switch control.

Key Features:

  • Genuine Mercury Marine OEM Part

  • Part Number: 879312T78

  • 30 ft extension key switch harness – No Crank

  • Provides secure ignition/key switch electrical connectivity

  • Marine-grade durability and corrosion resistance

  • OEM fit and finish for easy installation

  • Reliable performance for Mercury/MerCruiser systems

Applications:
✔ Mercury and MerCruiser applications requiring 30 ft No Crank extension harness (879312T78)

Choose Mercury OEM harnesses for long-lasting reliability, system compatibility, and factory-quality performance.

Product Disclosure – Scenic City Supply

Scenic City Supply is an independent liquidation company. We are a secondary seller of products and are not affiliated with, sponsored by, or authorized by any product manufacturer. All trademarks, brand names, model numbers, and logos mentioned are the property of their respective owners and are used strictly for identification and compatibility purposes.

Scenic City Supply’s inventory comes from multiple sources, including but not limited to surplus, liquidation, closeouts, overstock, and insurance-loss merchandise. All products are new, OEM, and unused unless otherwise stated. As a liquidator, some items may show cosmetic imperfections such as tarnish, discoloration, or minor surface wear. These conditions do not affect the function, performance, or integrity of the product.

Packaging may be damaged, show signs of storage, or be replaced for safe delivery. The sale of this product by Scenic City Supply is not subject to the policies of the manufacturer. Any warranty offered by the manufacturer is not available to you as the purchaser. Any applicable warranties or guarantees will be disclosed in writing at the time of sale.

Every item is opened and inspected prior to shipment to confirm quality and accuracy. If you are not fully satisfied with your purchase, you may return it within 30 days in its original packaging for a full refund.

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Product Disclosure – Scenic City Supply

Scenic City Supply is an independent liquidation company. We are a secondary seller of products and are not affiliated with, sponsored by, or authorized by any product manufacturer. All trademarks, brand names, model numbers, and logos mentioned are the property of their respective owners and are used strictly for identification and compatibility purposes.

Scenic City Supply’s inventory comes from multiple sources, including but not limited to surplus, liquidation, closeouts, overstock, and insurance-loss merchandise. All products are new, OEM, and unused unless otherwise stated. As a liquidator, some items may show cosmetic imperfections such as tarnish, discoloration, or minor surface wear. These conditions do not affect the function, performance, or integrity of the product.

Packaging may be damaged, show signs of storage, or be replaced for safe delivery. The sale of this product by Scenic City Supply is not subject to the policies of the manufacturer. Any warranty offered by the manufacturer is not available to you as the purchaser. Any applicable warranties or guarantees will be disclosed in writing at the time of sale.

Every item is opened and inspected prior to shipment to confirm quality and accuracy. If you are not fully satisfied with your purchase, you may return it within 30 days in its original packaging for a full refund.