When its time to replace your marine engine long block, knowing the year of the existing engine is critical. There are a couple of ways to determine this information. First is by checking the engine block casting code. If you don't know your casting number you can use the following link to see where this is located. Block Casting Number

If you cannot read your casting number but prefer to identify your engine model by features, use the following link

3.0L Engines
3.7L/470 Engines
4.3L Engines
5.0L/5.7L
7.4L/8.2L
8.1L/496

Marine Engine Re-powering Technical Links

Please select the following link that explains how the new EPA rules now in effect apply to your repowering options. Read More...