Mercruiser 63831A3 Oil Cooler Replacement 7.4L
Replaces Mercruiser part: 63831A3
Suits Mercruiser engines:
Various 7.4L (454 CU IN big block) engines
Cooler length: 8" / Bundle length: 5" / Oil connections: 1/2" NPT / Water connections: 1-1/4"
1 year warranty
This is a USA made oil cooler by Seakamp
![](https://cdn11.bigcommerce.com/s-37u16bcg43/product_images/uploaded_images/moved-2d0dd52bb141886d22b92c3ec412fcaf.png)