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Mercury 565 HP (525) at Miami Boat show.

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Old 02-21-2012, 11:10 AM
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The intake manifold is a modified design with a redo of the top of the HP500-HP525 EFI manifold similar to the change they made to this design for the new 502HO Mercruiser version.

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Old 02-21-2012, 11:59 AM
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Originally Posted by wrinkleface View Post
rode in the NT 420 w/ them! very nice, was told it's push'n that into the mid 80's!!!
Wrinkleface it was nice meeting you and your wife at the show! That ride on the nortech was definitely a good time.
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Old 02-21-2012, 01:04 PM
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What intake is used on this engine? I know the old one was an Arizona Speed and Marine. Thought I'd heard it was a retro'd GM RamJet or something.
Its the same intake as the 500 and 525, but they blocked off the front where the TB normally goes and machined 2 holes on top where the sticker normally goes. It has dual 80mm electronic throttle bodies now, but the flame arrestors are off the 496's.
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Old 02-21-2012, 01:37 PM
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Its the same intake as the 500 and 525, but they blocked off the front where the TB normally goes and machined 2 holes on top where the sticker normally goes. It has dual 80mm electronic throttle bodies now, but the flame arrestors are off the 496's.
Isnt that what Tyler Crockett did like two years ago?
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Old 02-21-2012, 01:50 PM
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Isnt that what Tyler Crockett did like two years ago?
kind of...he put 1 huge one on and it worked.
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Old 02-21-2012, 10:05 PM
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does anyone know the bore&stroke on the 533?
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Old 02-21-2012, 10:12 PM
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Wrinkleface it was nice meeting you and your wife at the show! That ride on the nortech was definitely a good time.
Back atcha!!! Soon 2 B wife?????
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