863709 Mercruiser Heat Exchanger MERCRUISER350 MAG MPI ALPHA/BRAVO MERCRUISER350 MAG MPI HORIZON ALPHA/BRAVO MERCRUISER5.0L MPI ALPHA/BRAVO MERCRUISERMX 6.2L MPI BRAVO MERCRUISERMX 6.2L MPI HORIZON BRAVO MERCRUISER4.3L MPI ALPHA/BRAVO

Note that this part we make has a round surge tank as shown in the picture.   We supply you with a mastic two-sided adhesive tape to hold your air pump in place.   Most people don't use the air pump for its intended use anyway, but this makes the unit appear as the OEM unit. 

Note that this part is guaranteed for fit and function and comes with a 2-year warranty. 

• 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.