Engines that this part goes on:  

• Welcome to our Spring sale on select replacements for Mercruiser heat exchangers. If your heat exchanger got caught in the 2024 January freeze this sale might be just what you're looking for. A great deal with OEM-level quality. And, remember with Mr. Cool heat exchangers, the only difference you'll notice is the price.
• Offered is our replacement for the 91036 Mercruiser Heat Exchanger for the GM Small Block engine.  This was designed for the early model Mercruisers.  
• This offer includes the heat exchanger, end caps with gaskets, and zinc.  
• This part is made with OEM equivalent materials and is guaranteed for fit and function.

 Some details to note:   

• This is a front-mount heat exchanger which means it mounts over the belts.

• Used on older V6 and V8 engines for a full system cooling of both block and manifolds.

• 4-inch tank diameter, 21.25 inches overall length

Our product is a drop-in replacement for these part numbers:

• Mercruiser 
  • 91036
  • 91036A1
  • 91036A2
  • 91036A3
  • 91036A4
  • 91036A5
  • 91036A6
  • 91036A7
  • 91036A8
  • Sendure 3291-7-5

This part fits the following engines (possibly more):

• 1985-1996   MCM V-6 (262 cid) engines with v-belts and an Alpha stern drive
  • S/N 0A331455 - 0F802999)
• 1983-1996   MCM/MIE V-8 (305 & 350 cid) engines (1983-1996) with v-belts