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377 scorpion motors ??

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Old 03-12-2009 | 07:49 AM
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From: Further South East of Dome Island
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Originally Posted by ezstriper
you can get there with a 400 block and 350 crank, but thats not how merc did it, it's a 350 block w/400 crank, just not punched .030 which would be a 383...
I concur.
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Old 03-12-2009 | 08:05 AM
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From: pa
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Originally Posted by 4mulafastech
I have the black 6.2's as well. From several threads I have read on the 292 with blue Scorpion 6.2's you can expect 7-10 mph increase, or say a 8.5 mph average increase. Figuring 20 HP for each mph, that's 170 HP or 85 HP per engine. Not a bad swap at all!

The black 6.2 is rated 320 HP at the crank while the Scorpion is 350 HP at the prop and probably a conservative rating at that, maybe for insurance reasons(?)

I have the full MerCruiser engine manual on the 6.2's and it includes the Scorpion engine. It shows a much better breathing EFI/intake system and full tube headers stock. Not to mention nice internals. They were pricey, but it would be a worth while project if you can find a good used set to freshen-up at a reasonable price.
so what kind of speeds could he expect on a 2002 292 with scorpions. gps speed
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Old 03-12-2009 | 08:16 AM
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From: pa
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Originally Posted by 4mulafastech
I have the black 6.2's as well. From several threads I have read on the 292 with blue Scorpion 6.2's you can expect 7-10 mph increase, or say a 8.5 mph average increase. Figuring 20 HP for each mph, that's 170 HP or 85 HP per engine. Not a bad swap at all!

The black 6.2 is rated 320 HP at the crank while the Scorpion is 350 HP at the prop and probably a conservative rating at that, maybe for insurance reasons(?)

I have the full MerCruiser engine manual on the 6.2's and it includes the Scorpion engine. It shows a much better breathing EFI/intake system and full tube headers stock. Not to mention nice internals. They were pricey, but it would be a worth while project if you can find a good used set to freshen-up at a reasonable price.
This does not have headers just merc manifolds and risers.
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