TOPIC: How to Properly Identify a Mercruiser Big Block V8 454 Marine Engine

QUESTION: I have a 1993 ( I believe ) mercruiser 454 serial #4501880 need more information as to what engine I exactly have, I just blew a hole in the crank case! Thank you. Alain.

RESPONSE: Mercruiser did in fact produce a variety of different 7.4L 454 model Big Block V8 Marine Engines over the years. There are a couple of ways tot properly identify which model version you have.

1. Visual Identification: You can check a few of the external and internal features the engine is equipped with to know which model you have……Read More
2. Serial Number: You can verify the serial number on the side of the engine block if the serial number tag is still attached……Read More
3. Mercrusier Block Code: You can verify and match the code Mercruiser stamps into the engine block……..Read More
4. Other Visual Comparisons: Here are a few more visual identifiers that may be considered helpful…….Read More

If you have any other questions please don’t hesitate contacting us directly at [email protected] and we will be happy to assist you further.

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