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Are my 5.7 l MerCruiser vortec or not?

Old 08-08-2013, 10:31 AM
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Default Are my 5.7 l MerCruiser vortec or not?

Hi guys,

my engine has serial number K278718, and is supposed to be a 1997 260 HP 5.7 l V8. I can't figure out if it is a Vortec engine or not, even looking at Performance Products parts diagram. It says 5.7L 2BBL 5.7LX 4BBL 350 MAG ALPHA/BRAVO.

Can anyone help me out?


Regards,

Johan
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Old 08-08-2013, 10:53 AM
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Look at the number stamped on the head. I don't know it right off hand but the vortec heads will be identified by the number stamped on head
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Old 08-08-2013, 11:05 AM
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A vortec head will have 8 intake bolts (2 in each corner) while a pre vortec will have 12 (2 in each corner plus 2 center).
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Old 08-08-2013, 11:08 AM
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ok, then it is pre-vortec since the intake has 12 bolts. Pretty strange since the engine is in a 1997 Sea Ray, I thought they all were vortec from 1997 and up....

Thanks!


Regards,

Johan
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Old 08-08-2013, 05:06 PM
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Originally Posted by jsoderbe
I thought they all were vortec from 1997 and up....
A few TBI's were Gen+ starting in 1996/7 then in 1998 most production models became Gen+ (vortec).

http://www.boatfix.com/merc/bullet/97/97_06.PDF
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Old 08-08-2013, 09:12 PM
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I thought vortecs had plastic timing covers.
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