Mercruiser Replacement Heat Exchanger, 470 Merc Inboard 3" Diameter, 78165

Mercruiser Replacement Heat Exchanger, 470 Merc Inboard 3" Diameter, 78165
SKU: 549458
Mfg# 78165
UNIT: Each
Description When Available: 470 Merc Inboard 3" DiaSen-Dure Where Available: 2645-4-5OEM Where Available: NA001402
Ships from Manufacturer (Typically Ships out in 3-5 Business Days)
Mercruiser direct replacement heat exchanger allows use of hot water cabin heater in cooler climates.

  • Allows use of hot water cabin heater in cooler climates
  • Winter draining of engine block is unnecessary
  • Dual zinc anodes prevent electrolysis
  • Kit includes detailed instructions
  • Rust inhibitor antifreeze protection
Picture shown may not represent particular item ordered. Please call customer service with any questions regarding specific models.

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Extend the life of your engine and protect it from corrosion with this easy to install, quality built, heat exchanger.

Ratings & Reviews

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excellent customer service. , we had a slight problem and they were quick to remedy it. They had gone above and beyond what most company would have done. I would shop here again. also great prices


The length of the warranty may vary by product, please refer to your product for the exact terms and conditions of the warranty for your purchase.


  • Restocking charge will apply at a minimum of 25% for all product returned.
  • All Returns must be received within 30 days of recevipt of the order.
  • All Products are non-returnable if they have been installed.
  • Manufacturer defects reported within 30 days of receipt will be supplied a pre-paid label for return shipping upon approval.
  • Please contact Go2marine LFS Marine and Outdoor for Manufacture Defects, Returns and help with Warranties.