MarineEngine.com - Your online store for all types of marine engines and boat parts.
PHONE ORDERS
Monday - Friday
9:00 AM - 5:00 PM EST
Click for TOLL-FREE Number
Online Checkout
Special $9.95 Flat Rate Shipping
(800) 209-9624 | Home | Contact | Shipping | Returns | Cart View your shopping cart.
Part Number Search
Shop by engine/drive part number.
Original & matching parts for sale.
Manuals & Accessories
Shop by description, item number
or manufacturer's model number.
Boat Repair Forum Boat Repair Forum   Boat Video Gallery Video Gallery
   
Results 1 to 2 of 2
  1. #1
    Join Date
    Jan 2006
    Location
    Rockford, IL, USA
    Posts
    3

    Default Does anyone know if the gen 6

    Does anyone know if the gen 6 square port heads will work on a gen 4 chevy 454 block? My rebuilt engine was stolen from Roadway shipping company which was the 370hp motor from mercruiser. Now I'm looking for a replacement. Since these parts are becoming harder and harder to find. A Marine engine builder said that I could use a set of gen 6 heads on my gen 4 block. They say the only difference is the bolt sizes on the front a rear of the heads for bracket mounting. Anyone have any ideas?? Thanks

  2. #2
    Join Date
    Apr 2004
    Location
    Posts
    237

    Default The water passages on the mark

    The water passages on the mark IV 454 and the gen 5 heads are different and require some adaptation. I am usure about gen 6 but think it is the same as gen 5. Check very carefully before using.

Similar Threads

  1. What heads fit mercruiser 1996 4.3 gm block number 535
    By seamus in forum Mercruiser Sterndrive Forum
    Replies: 1
    Last Post: 03-05-2010, 07:13 PM
  2. Building marine engine with 350 block and 882 heads
    By chris0061 in forum Mercruiser Sterndrive Archive
    Replies: 2
    Last Post: 06-07-2009, 08:52 PM
  3. Aluminum heads on iron block
    By gearhead in forum Mercruiser Sterndrive Archive
    Replies: 7
    Last Post: 07-09-2008, 07:57 PM
  4. 43L Mercruiser Cracked heads
    By dhoyerjr in forum Mercruiser Sterndrive Archive
    Replies: 4
    Last Post: 06-22-2008, 05:28 PM
  5. Mercruiser 350 heads
    By wellcraftnova230 in forum Mercruiser Sterndrive Archive
    Replies: 5
    Last Post: 12-07-2006, 04:47 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •