Will Accessories from Mark IV transfer to Gen 6

1BIGJIM · 09-10-2009, 01:43 PM

I have been looking at a couple Gen 6 engines, are the bolt holes in the same place for all the V-Belt accessories? Will the 3groove pulley on the balance bolt on?

I know they is no provision for fuel pump.

Wobble · 09-10-2009, 03:06 PM

I think everything matches except a couple of holes are 3/8 instead of 5/16. I have done that swap in the past and only had to find a couple of bolts as I recall.

mrfixxall · 09-10-2009, 03:09 PM

yes everything will swap over..

jfm · 09-10-2009, 03:14 PM

It all lines up. I did a full serpentine kit on a Mark IV block no problems. I don't know about the bolts cause I just replaced them all with new. Other than that it all lines up.

1BIGJIM · 09-10-2009, 04:02 PM

Thanks!

I see no reason to not go to a pair of 540's, the wife will never know the difference

eichhoma · 09-11-2009, 08:54 AM

Everything will match up with the exception of having to open some 3/8 accessory holes up to 5/16 as wobbles previously said.

Rockfish71 · 09-11-2009, 09:44 AM

Quote:

Originally Posted by 1BIGJIM

I have been looking at a couple Gen 6 engines, are the bolt holes in the same place for all the V-Belt accessories? Will the 3groove pulley on the balance bolt on?

I know they is no provision for fuel pump.

Yes.... but You will have open all the accessories hole to 7/16 not 5/16 it is very easy to do all you need is a cordless drill and a 7/17 drill bit and new bolts. been there and done that for last engine build.

bigalhenry · 09-11-2009, 03:38 PM

You may also have to do something about your oil cooler adapter and hoses if you are using the stock Mercruiser type.
Gen 4 uses a filter adapter plate with 2 bolts. Gen 6 is setup like a Ford with the filter screwing on to a pipe thread straight into the block. The stock Gen 4 oil cooler adapter will not work with this. You will need a different adapter and oil lines.