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05-07-2006, 12:44 AM
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#11
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Neno the mind boggler
 Gold Member
Join Date: Sep 2001
Location: toledo oh
Posts: 9,038
Batboat, 38 Donzi ZX, 16 Sidewinder, 10' Zodiac and a ScarabIII
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Re: merc 525SC's
are the 525's based on the 454 or 502?
__________________
Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
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05-07-2006, 12:46 AM
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#12
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Registered
Join Date: Dec 2002
Location: 1000 Islands
Posts: 4,577
353 FasTech
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Re: merc 525SC's
454
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05-07-2006, 01:04 PM
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#13
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Registered
Join Date: May 2005
Location: Austin, Texas
Posts: 537
N A D A
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Re: merc 525SC's
I had one in my 26' Scarab. I bought it used from a guy that ran the piss out of it! I also ran the piss out of it for three seasons with no problems before selling the boat! I have been looking for a pair to put in my 29', so if you don't get them let me know! They are not much faster than the HP500 but the bling factor of a (dependable) blower motor is worth it to me!!! 
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05-07-2006, 01:32 PM
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#14
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Gold Member
Gold Member
Join Date: Aug 2005
Location: Colchester Vermont
Posts: 444
2003 Powerquest 300 Revenge Blown 454's
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Re: merc 525SC's
Great motors 
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05-07-2006, 04:08 PM
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#15
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Life is good lb:)
 VIP Member
Join Date: Aug 2004
Location: Paducah KY KY Lake
Posts: 3,525
39 Lip-Ship Cigarette 700 Zuls
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Re: merc 525SC's
good engines... ck for small blower pullies.
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05-08-2006, 07:54 PM
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#16
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Neno the mind boggler
Gold Member
Join Date: Sep 2001
Location: toledo oh
Posts: 9,038
Batboat, 38 Donzi ZX, 16 Sidewinder, 10' Zodiac and a ScarabIII
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Re: merc 525SC's
Quote:
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Originally Posted by customtouch
. . . . the bling factor of a (dependable) blower motor is worth it to me!!! . . . |
kinda what i was thinking, there nice and whiny to
good info guys. 
__________________
Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
Last edited by glassdave; 05-08-2006 at 07:59 PM.
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05-09-2006, 12:46 AM
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#17
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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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Re: merc 525SC's
My 525sc has been great and pretty much trouble free. I went through the top end at 350 hrs and all still looked real good. I changed to roller cam(731), replaced the springs, and a got a valve job.
I just fired mine yesterday for the first time in 7 months. It took about 5 seconds to fire up.
Do a search on 525sc. Lots of good info.
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05-09-2006, 07:37 PM
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#18
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Platinum Member
 Platinum Member
Join Date: Jan 2004
Location: Northern NY
Posts: 4,393
'06 35 Lightning Merc HP 525's aka The Black Biotch
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Re: merc 525SC's
Had the pleasure of running a pair of 525 SC's for 7 years. Changed oil and filters every 25 hrs. and threw plugs in once a season. Period!!! Had chillers and boost upped to 7.5 lbs. and CMI Elbow Tops from day one, they never let me down!!! Sold the boat two seasons ago and they are still running strong. New owner had them checked out and dynoed them at 638 HP and was told by his engine guy to leave them alone and just run them, no issues whatsoever. Would trade my HP 500's for a pair any day. Hot Rod Mag wrote them up some years ago as the best, most reliable blower set up ever!!!
Last edited by RaggedEdge; 05-09-2006 at 07:44 PM.
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05-10-2006, 03:10 PM
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#19
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Cold as a Blue Dog
Platinum Member
Join Date: Aug 2001
Location: Aurora Ontario
Posts: 3,910
little cat...BIG MOTOR
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Re: merc 525SC's
The motors are great, the blowers on the other hand are not real good pieces. Check the oil resevoirs for over full( fuel) or under full( seal gone). Seen several that way. Drop the belt and shake the pulley back and forth. If they have been low on oil for any period, the imput shaft splines wear away and you can hear the play in the shaft to driven gear coupling. The Blower shop has a kit with shaft, seals,gaskets, bearings and drive coupler for fair $
__________________
Happiness is a Boat and a nice bit of Tail
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05-10-2006, 06:15 PM
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#20
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Neno the mind boggler
Gold Member
Join Date: Sep 2001
Location: toledo oh
Posts: 9,038
Batboat, 38 Donzi ZX, 16 Sidewinder, 10' Zodiac and a ScarabIII
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Re: merc 525SC's
thanks again guys. Airpacker do you have a part number for that kit by any chance?
__________________
Throttles- Cleveland Construction 377 Talon
08 OPA Class 1 National Champion
08 Class 1 Geico Triple Crown Champion
08 OPA High Points Champion
10 OPA Class 1 National Champion ( happy now Ed! )
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