Offshoreonly.com - 454 to 500hp motor

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Martin718

07-31-2012 02:13 PM

454 to 500hp motor

How much fab or changes if any are needed to go from a 454 to a 500hp blue merc

endeavour32

07-31-2012 10:42 PM

If you are talking about swapping out your 454 to an hp 500, then its pretty much a drop in. If the 454 is a Gen IV then there are some very minor differences in the bolt size that holds the assessories on the heads but thats about it.

mike tkach

07-31-2012 10:48 PM

you will need a hd coupler,and a cooler and oil thermostat that comes with the hp500,if you are replacing a black motor.

mike tkach

07-31-2012 10:50 PM

u will also need to upgrade the exhaust system,or you will get reversion.

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