Like Tree0Likes

Any Info on Merc 600SC's?

Old 06-16-2006, 12:52 AM
VIP Member
10x's Avatar
Join Date: Dec 2003
Location: La Grange Ill
My Boats: 1989 10 mtr Fountain
Posts: 4,799
Default Re: Any Info on Merc 600SC's?

Originally Posted by khadley
here's a better pic with the inner coolers added
How in the heck do you get at the "outside" spark plugs? Is that boat a eliminator?
I changed engines in a 28' Eliminator cat, and you could'nt even get at the outside plugs after the blowers went on.
Fountain powerboats rule "The Preacher"
Chicago Powerboat Club Director
[email protected]
10x is offline  
Reply With Quote
Old 06-16-2006, 04:00 AM
Platinum Member
Platinum Member
GLH's Avatar
Join Date: Dec 2002
Location: Burlington, VT
My Boats: Azimut
Posts: 15,267
Default Re: Any Info on Merc 600SC's?

Originally Posted by WildWarrior
I think they're well built engines, at 300hrs we pulled ours down to add roller cams, pistons and heads.
Other than valve springs, they would have gone for several hundred more hrs,they are on snooze. Low compression ,low boost, small cams etc.
The down side is the 420 blowers, it's hard to find parts, I broke two input shafts in the last 3 seasons, which may me partially do to the 7lbs of boost were now running, stock you will see 4lbs or so..
The only down side I see is how very very thirsty these engines are with the pair of 700cfm Holley's per engine.
Good Luck!
The boat I owned previously had them and they are excellent motors.

I suggest watching fuel pressure religiously... (like any blower motors) bottom ends are bullet proof, they are easy to rebuilt and with a chiller and a change of pulley you can get easily 730-740 out of them.

I never had problems with tghe blowers but I did not run more than 5-6# of boost.
Attached Thumbnails
Any Info on Merc 600SC's?-engines.jpg   Any Info on Merc 600SC's?-img_0686-mr-2.jpg   Any Info on Merc 600SC's?-millsb.jpg  

GLH is offline  
Reply With Quote
Old 06-16-2006, 11:00 AM
RHC's Avatar
Join Date: Oct 2002
Location: Sandusky Bay
Posts: 1,375
Default Re: Any Info on Merc 600SC's?

I have 470hrs on my 600s,, 1997 models and I have changed the valve springs at 330 hrs,,, they are strong engines ,,, they did not come with a chiller ,, I do not believe in changing Merc moters, they are very conservitive and will last from the factory,,, It looks like these have been messed with,,,, they are hard on gas but that comes with the boat deal!!

RHC is offline  
Reply With Quote
Old 06-16-2006, 11:10 AM
Thread Starter
Join Date: Sep 2004
Location: St. Louis / LOTO
My Boats: 38 Scarab AVS
Posts: 556
Default Re: Any Info on Merc 600SC's?

Hunster - I hear ya... price seems a little proud, but I have yet to see the boat in person. Of course, I hope there's a little wiggle room in there.

Khadley - motors were just rebuilt, not sure of who did the work; aren't Merc racing motors supposed to be blue???

RHC - thanks for the info, it sounds like they're pretty bulletproof when ran stock. I'm not sure if they've changed pulleys or anything on these. Better find out.

My insurance man and the gas pump are going to love me if this happens... Thanks, guys for all advice.
Shallow Minded is online now  
Reply With Quote

Related Topics
Thread Starter
Last Post
General Q & A
04-04-2008 04:17 PM
General Q & A
06-12-2006 06:29 PM
General Boating Discussion
06-11-2006 04:17 AM
General Boating Discussion
03-20-2002 03:28 PM
Dock Holiday
General Q & A
01-12-2002 04:25 PM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -5. The time now is 08:25 PM.

Copyright 2011 OffShoreOnly. All rights reserved.