Offered is our replacement for the 879330T35 Mercruiser Heat Exchanger- OD of appx 4-1/8" diameter.  This includes the heat exchanger, end caps with gaskets and the OEM seals that are used in the crossover.  

This part is made with OEM equivalent materials and is guaranteed for fit and function.   It has a 1 year commercial and 2 year pleasure warranty per our terms and conditions.

The OEM seals can take a set or get a little brittle over time and you could end up with a glycol leak where the heat exchanger presses into the crossover if you try to re-use the existing seals.   It’s not recommended to re-use them.  In addition, this heat exchanger is made with a fixture and checked for fit prior to shipment to confirm that there will be no fit issues interfacing with the crossover. 

We highly recommend changing the thermostat when replacing your heat exchanger. Thermostat rating: 160 Degree (Part #: 863358T). We do not carry this product.

Some details to note:   

• 879330T35 is a 4-1/8 inch part -   
• a 4-1/8 inch ID (inner diameter) part has an OD that is approximately 4-1/8" to the outer diameter.  

Part Number that this part replaces:

• Replaces MerCruiser 
• 841059T02
• 841059T03
• 841059T04
• Fits 8.2L Engine crossover 841058T01

 Engines that this part goes on:  

• 525 EFI
• 600 SCI
• 662 SCI
• 700 SCI