Bow tie block vs ZZ 502
02-19-2014, 01:19 AM
#11
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Thread Starter
It appears the Dart And Bowtie blocks have smaller water passages to the head than the 10237300.( better head gasket seal I spose) Also you can get a Bowtie block with the 6 or 10 bolt timinig cover. One has a 1 piece and the other has a 2 piece rear main. Possibly the one will cool better w the larger water passages in a open cooling system. Maybe that is why mercury used them.
Last edited by mcprodesign; 02-19-2014 at 02:49 AM.
02-19-2014, 06:43 AM
#12
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All the parts for a one piece seal block are a little more money. There is alot more two piece stuff out there. If I was starting from scratch I would spend the money and get a two piece dart block. It worth it in the long run. If you shop around you could probably get one for 1800 I bought mine for 1800 with a block kit about a year ago.
02-21-2014, 11:20 PM
#15
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I don't really know the answer . But i think the heads and exhaust ports may be different. If It were me, I would just run the Gen 7 parts and not try to run other gen stuff with it. Unless the part number is the same. Just check part numbers. I would Only Use what Factory built. Like a 300 block on a freshwater motor. Like I said, It looks like the water jackets are bigger by the head than say a Dart or Bowtie block. The 300 block runs 135 water temp and 140 oil temp for the most part. That means Mercury did something right in my book.I guess I answered my own qustion here. Don't basterdise unless you are building a vdrive or some drag car/ boat.
02-26-2014, 03:06 PM
#20
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Just got my new gen 6 bowtie block delivered to the house last friday. Nice piece and way better than production block i am replacing. I ended up ordering it through Summit Racing because the had free shipping. $1879.87 to my door. Couldnt beat that accounting for shipping savings.
Last edited by Gimme Fuel; 02-26-2014 at 03:09 PM.
