Mercruiser 74643 Heat Exchanger Replacement
Replaces Mercruiser part: 74643
Suits Mercruiser engines:
Small Block Chevy 305 - 350 V8 blocks (front mount)
1 year warranty
This is a USA made heat exchanger by Seakamp.
![](https://cdn11.bigcommerce.com/s-37u16bcg43/product_images/uploaded_images/moved-752e592300eb3ddd7093b557e3e39bf5.png)
![](https://cdn11.bigcommerce.com/s-37u16bcg43/product_images/uploaded_images/moved-0a8492b2022b6869a1cbd000578d4eca.png)
Replaces Mercruiser part: 74643
Suits Mercruiser engines:
Small Block Chevy 305 - 350 V8 blocks (front mount)
1 year warranty
This is a USA made heat exchanger by Seakamp.