Chev Stainless Steel Mercruiser Thermostat Housing Replaces 860256A4 Sierra 18-1989 and 18-3530-1

SKU: 4101496

Sale price$449.00 Regular price$510.00


  • For use in Big Block and Small Block Chevy Mercruiser Applications
  • Constructed of Cast Stainless Steel.
  • Replaces factory black cast iron MerCruiser housing.
  • Designed to work in conjunction with the factory circulating pump.
  • Can be used in low profile applications such as EFI engines etc.
  • Thermosat NOT Included.
  • Works with Mercruiser 860256A4 MCM & MIE V6 – V8 (305 & 350cid) w/Bravo Drive
  • Replaces Sierra 18-1989 and 18-3530-1

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