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Whats my 454 Merc???

Old 01-15-2013, 12:08 PM
  #31  
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Originally Posted by lil red
it makes no sense to me but they did it! there is a thread on here somewhere about merc crossbreeding intakes
So stupid.... but oh well... lol
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Old 01-15-2013, 01:54 PM
  #32  
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Originally Posted by keith2500hd
the engine as sold/built was TBI(7.4 TB5) sold in 98 and had MPP to 03(extended warranty) tbi probably crapped out and switched to carb, cheap and simple. check carb numbers and specs to make sure setup your engine.
Where did you find this information? Can you share a link to it?

Every place I have looked comes up as a '97 carb engine including the Mercury site.http://www.mercurymarine.com/parts-a...parts-catalog/
Launch catalog-enter serial number OK282859 -select "engine" catalog-click down arrow in drop box above parts list. You will then see all the catagories of parts for that engine including carburetor.

Last edited by picklenjim; 01-15-2013 at 01:58 PM.
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Old 01-15-2013, 01:56 PM
  #33  
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Originally Posted by Spooln
Correct I got the serial number off plastic cover on carb. Its not MPI I know that. The serial number can go both ways with Mag or non-mag. The cover only says 7.4/Bravo Thunderbolt ign. on it
A cover that says 7.4/Bravo is a non-Mag.
Mags have aluminum GM hi rise intakes, and MOST non-Mags have cast iron low rise intakes. NO MAGS have cast iron intakes. If a magnet sticks to it, it is DEFINITELY NOT A MAG. If the magnet falls off, then it MIGHT be a Mag, but not necessarily.

MC
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Old 01-15-2013, 04:51 PM
  #34  
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Originally Posted by 1BIGJIM
The carb Mags had an aluminum high rise.
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Old 01-16-2013, 08:12 AM
  #35  
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Picklejim
If you put in my serial # it comes up with mag heads and bravo heads in its parts list so that why I'm confused
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Old 01-16-2013, 01:14 PM
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Hey Spooln, you posted this same question on another forum, which I looked up for you. However the serial number you posted there was ok282585, which is a carbed gen VI 7.4L. Which number is correct? The number you posted here, ok282859 is indeed a TBI 7.4L.

Bob Lloyd
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Old 01-16-2013, 01:46 PM
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bobl 585 is correct one. I know its a Gen VI 7.4l Carb wanted to know what heads are on it. I get different listings for heads might be rec. or peanut heads
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Old 01-16-2013, 02:41 PM
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Originally Posted by Spooln
Picklejim
If you put in my serial # it comes up with mag heads and bravo heads in its parts list so that why I'm confused
Simple. After you type in the serial number the next screen will come up saying it's a "Gen6 7.4L Bravo". If it were a mag it would say "Gen6 454 Magnum Bravo". Diagram is used for both models. In the list it shows 2 listings for heads. One says 454 Magnum and the other 7.4L Bravo. Beings this serial number comes up as a 7.4L Bravo then it would be the heads listing which says 7.4L Bravo after it. By the way both serial numbers that Bob L listed come up as the same engine, model 474B110KS carb engine.
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Old 01-16-2013, 02:54 PM
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Originally Posted by bobl
However the serial number you posted there was ok282585, which is a carbed gen VI 7.4L. Which number is correct? The number you posted here, ok282859 is indeed a TBI 7.4L.
Bob Lloyd
Bob, I come up with both of these serial numbers being the same engine model, 474B110KS which is a carb engine. Sure your not confusing it with TB5 which is Thunderbolt 5 Ignition? Can you post a link to where you seen this?
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Old 01-16-2013, 05:41 PM
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Oops, my bad. You are correct they are both the same carbed engine. I'm a Merc dealer and looked it up on product history. I just had TBI on the brain after seeing the conflicting serial numbers and other post about TBI. But to answer Spooln's question that is definitely a peanut port engine. It used a GenVI roller cam short block, but the peanut port heads as opposed to the Vortec heads on 1998 and later 7.4L.

Bob

Originally Posted by picklenjim
Bob, I come up with both of these serial numbers being the same engine model, 474B110KS which is a carb engine. Sure your not confusing it with TB5 which is Thunderbolt 5 Ignition? Can you post a link to where you seen this?
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