Big Block Actual Dimensions
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Big Block Actual Dimensions
Hi, I have a total 'newb' question regarding engine sizes; are the various sizes (454, 502, 496, etc.) just based on bore/stroke using the same block or are they actually different size engines completely? If, for instance, my boat had twin 454 mags, would I be able replace them with Mercury Racing 540s or maybe Procharged 502s?
I'm toying with the idea of a Scarab Panther and they usually seem to have 454s. If I wanted more power could I have them converted to 496 or 502, or are those different engines? Would they fit?
Again, I know it's pretty basic, but I just cannot seem to find an answer about this.
Thanks,
I'm toying with the idea of a Scarab Panther and they usually seem to have 454s. If I wanted more power could I have them converted to 496 or 502, or are those different engines? Would they fit?
Again, I know it's pretty basic, but I just cannot seem to find an answer about this.
Thanks,
#2
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454 and 502 blocks(Mark IV, GenV and GenVI) are different but can use the same cranks, rods, heads, etc.
The Merc 496/8.1(Gen 7) is totally different.
As far as mounting the external dimensions are all the same and any will mount in the same place.
The Merc 496/8.1(Gen 7) is totally different.
As far as mounting the external dimensions are all the same and any will mount in the same place.
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