Like Tree0Likes

Looking for opinions Merc 525/HP-500 or Custom 540/ 650 HP

Reply
Old 02-17-2003, 09:16 PM
  #1
KN
Registered
Thread Starter
 
Join Date: Oct 2000
Location: Gorham, Maine
Posts: 862
Default Looking for opinions Merc 525/HP-500 or Custom 540/ 650 HP

I'm really looking for a lot of insight here or opinions. Would you choose a Merc HP-500 or 525 or a custom built 540 650 HP. The 540 has a Merlin or Dart block my choice and all the best quality parts ( I don;t have a build sheet but I can get one if that will help with your opinions) The 540 will be balanced and blueprinted, which from my understanding the Merc's are not, correct me If I am wrong. The 540 comes with a one year warranty. One of my concerns is the 540 is carberated as apposed to fuel injected. Or in your opinions does it matter. And the cost is about the same as a HP-500 and less than the Merc 525.

Thanks Kirk

Looking for a lot of help here, especially from you engine builders.
KN is offline  
Reply With Quote
Old 02-17-2003, 09:24 PM
  #2
Gold Member
Gold Member
 
liquid asset's Avatar
 
Join Date: Oct 2001
Location: Haslet, TX,USA
My Boats: Wellcraft Gran Sport 3400
Posts: 1,936
Default

what engine builder or boat manufactuer
liquid asset is offline  
Reply With Quote
Old 02-17-2003, 09:25 PM
  #3
Gold Member
Gold Member
 
liquid asset's Avatar
 
Join Date: Oct 2001
Location: Haslet, TX,USA
My Boats: Wellcraft Gran Sport 3400
Posts: 1,936
Default

Probably the 540
liquid asset is offline  
Reply With Quote
Old 02-17-2003, 09:28 PM
  #4
Registered
Trade Score: (1)
 
JimV's Avatar
 
Join Date: Nov 2000
Location: Grand Rapids Mi. U.S.
My Boats: 27' Fountain
Posts: 708
Default

I'd go with the 540's. We just pulled 525 blower motors out of a 1988 38 cig with 3a's. Top speed 68mph on GPS. Installed 540's, the boat sea trialed today in florida. It ran 78mph on GPS full of ass "n" gas 85 degree air temp. You are very limited with the 525's as far as upgrading

Last edited by JimV; 02-17-2003 at 10:07 PM.
JimV is offline  
Reply With Quote
Old 02-17-2003, 11:11 PM
  #5
Registered
 
Cigwillie's Avatar
 
Join Date: May 2001
Location: Chicago
My Boats: 1989/99 Cafe Racer
Posts: 172
Default I'd go with the 540's also

Quote:
Originally posted by JimV
I'd go with the 540's. We just pulled 525 blower motors out of a 1988 38 cig with 3a's. Top speed 68mph on GPS. Installed 540's, the boat sea trialed today in florida. It ran 78mph on GPS full of ass "n" gas 85 degree air temp. You are very limited with the 525's as far as upgrading
That 68 was w/tailwinds, I would venture to guess.
Cigwillie is offline  
Reply With Quote
Old 02-17-2003, 11:15 PM
  #6
Registered
 
Back4More's Avatar
 
Join Date: Feb 2002
Location: Lake Michigan
My Boats: 353 Fastech
Posts: 6,624
Default

Oh, 540's for sure!
Back4More is offline  
Reply With Quote
Old 02-18-2003, 08:32 AM
  #7
Registered
 
388Hustler's Avatar
 
Join Date: Feb 2003
Location: Louisville, KY
My Boats: 1999 388 Hustler
Posts: 401
Default

540

The carb isn't so bad, especially if you think you might want to upgrade to a blower. The upgrade is a little easier and less expensive (just my opinion). I've had both...
388Hustler is offline  
Reply With Quote
Old 02-18-2003, 08:50 AM
  #8
KN
Registered
Thread Starter
 
Join Date: Oct 2000
Location: Gorham, Maine
Posts: 862
Default

Quote:
Originally posted by 105mph_38_2003
Are you talking about the new Merc 525 efi?? Or the 525sc? I would go with the 540 too but I personally would'nt want to mess with carbs...Just my .02

What boat is this going in?? Drives??
The new 525 EFI's, How much work is there to mess with carberated engines? Going in a 31' boat with no pads steps or transom notch, will have 12'' extention boxes. I don't know what drives to use, still researching. Twin 650's in a 31' boat around 6500 lbs, any suggestions? Imco Extreme, Bravo XP's, maybe find a pair of #III's.

Thanks Kirk
KN is offline  
Reply With Quote
Old 02-18-2003, 08:50 AM
  #9
Registered
 
26scarab's Avatar
 
Join Date: Mar 2001
Location: st. clair shores mi ,us
Posts: 1,620
Default

Go with the 540's
26scarab is offline  
Reply With Quote
Old 02-18-2003, 09:14 AM
  #10
Platinum Member
Platinum Member
Trade Score: (1)
 
KAAMA's Avatar
 
Join Date: Oct 2000
Location: Western Michigan
My Boats: A boat?....What boat??? How about a galvarnized warsh tub wit a toranady strapped own da rear!
Posts: 4,329
Thumbs up 540's

KAAMA is offline  
Reply With Quote
Reply

Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
CHEKT OUT
General Q & A
4
12-09-2007 02:13 PM
Magic34
General Boating Discussion
28
10-24-2007 06:05 PM
dfealy
General Q & A
11
09-21-2007 05:07 AM
Linster
General Boating Discussion
1
05-17-2004 06:23 PM
merlin540
General Boating Discussion
3
02-01-2002 06:14 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 03:59 AM.


Copyright 2011 OffShoreOnly. All rights reserved.