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09-17-2007, 01:50 PM
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#1
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Registered
Join Date: Mar 2006
Location: Miami, Florida
Posts: 188
Sterling Powered 40 Skater
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Merc 525 EFI Merc 575 SCI
Can anyone tell me the pros and cons between the 525 efi and the 575 sci Mercs. Also I heard the 575 has high fuel consumption, what would be the consumption difference between the 2?
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09-17-2007, 02:48 PM
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#2
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Charter Member # 55
 Charter Member
Join Date: Oct 2000
Location: Omaha
Posts: 11,046
32 Active Thunder
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If you're in Florida, get the 525efi for the closed cooling alone. They are actually more like 540-550hp.
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09-19-2007, 08:39 PM
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#3
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Registered
Join Date: Mar 2006
Location: Miami, Florida
Posts: 188
Sterling Powered 40 Skater
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Thanks Griff, Anyone know of any good deals on a pair of 525's out there???
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09-19-2007, 08:53 PM
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#4
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Platinum Member
 Platinum Member
Join Date: Jun 2003
Location: Wethersfield CT/Bristol RI
Posts: 6,779
Ilmor Outerlimits
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Go with the 525's for Griff's reasons and they are much more fuel efficient and you dont have to worry about higher octane gas and the blower. If im not mistaken the 575's need 89 or higher and the 525's only need 87.
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09-19-2007, 09:09 PM
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#5
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VIP Member
 VIP Member
Join Date: Nov 2000
Location: Lake Lanier - N. Georgia
Posts: 6,206
boats , racing boats , golf
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I'd take the 575 , add an inner cooler and turn up the boost!
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09-20-2007, 08:58 AM
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#6
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Cigarette #1, I know why!
Charter Member
Join Date: Oct 2000
Posts: 3,064
'00 Scarab Sport CC
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The 575's are not that thirsty. My 575's use the same amount of fuel as my 2 buddys w/ 525's.
The 575 is really a stong - well built motor. Not choked up w/ sensors either - YOU can work on it. They both need upper end freshning up around 300ish hours. The 575 blower should be sent off to Blower shop for upgraded bearings / seals (about $1K)
Go for the blower - you will love them and the instant response!
__________________
BillR
'00 Scarab Sport 302
'02 Cigarette Top Gun
'02 PQ 340
'00 PQ 280
'98 Scarab 20
'97 Baja Outlaw 20
'72 Checkmate
'65 Glastron
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09-20-2007, 09:02 AM
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#7
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FOUNTAIN HUNTER
VIP Member
Join Date: Jul 2005
Location: Colts Neck,NJ
Posts: 2,152
2002 Outer Limits 51'
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I ran trip 575's they are great I would recomend them over 525's any day.
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09-20-2007, 09:39 AM
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#8
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got MILF?
Platinum Member
Join Date: Nov 2002
Location: Nashvegas, TN
Posts: 2,333
2001 Nordic 28' Heat EBM 575sci
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575 all the way
I agree with the 575. It's a very reliable motor in stock form, and easily upgradeable to the 700HP range, with bolt ons and ECU modifications. Even more if you go inside.
The 525 is a great motor, but is not easy to upgrade.
Regards,
Steve
__________________
In boost we trust..............
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09-20-2007, 04:54 PM
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#9
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Registered
Join Date: Mar 2006
Location: Miami, Florida
Posts: 188
Sterling Powered 40 Skater
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If anyone knows of any 525's for sale please let me know.
Thanks, Dustin
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09-20-2007, 05:28 PM
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#10
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Registered
Join Date: Jun 2005
Location: NORTH LAUDERDALE FL,
Posts: 2,116
2005 38 FOUNTAIN ,EC
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