Merc 575SCI leftovers. Buy?
 

I am thinking about upgrading the engines in my new boat. What are the pros and cons of the 525 vs.575. I am going to be running Arneson #6's. I was told that there is a good deal from Merc on leftover motors. At the price I am being quoted for the bigger motors I think I can't refuse. Anything I should be aware of on the 575?

Re: Merc 575SCI leftovers. Buy?
 

As stock, there is not much difference in the actual HP between the two. I have heard from some good sources that the 525s are pushing out between 535 and 545 in some cases (there is a thread on this board as well). This was a dilemma when I bought my boat and based on all the people I spoke to, they said the 525s were the way to go because stock performance in my boat was only increased by two maybe 3 MPH., for a substantial increase in cost. My best friend has a 02 29 Fever with the 575 and there is basically no performance difference except the 2 MPH top end. Now he has messed with the boost a little and ECU and is seeing 86MPH. Quite higher than my 78-79. I guess it would boil down to how much they are charging for the 575s. Since Merc is discontinuing the 575s it might be a good time to buy.
I love the 525... and he loves his 575.

Re: Merc 575SCI leftovers. Buy?
 

Chuck, Go with the 525's Ive been doing my homework on this one and almost every person reccomends the 525 over anything else out there

Give me a call

361-6521

Re: Merc 575SCI leftovers. Buy?
 

Thanks for the input Masher44, Troutly, and Otis. Not to really throw off the question, but what are your thoughts on the new Merc 600? Otis, hows Florida?

Re: Merc 575SCI leftovers. Buy?
 

I think ottis is leaving for FL tomorrow Morning.

A buddy has an Outerlimits 37 with 575's he changed pulleys and reprogramed the ECU pushes his rig to 93 rated around 675 now. To get that out of your 525's you might have to spend somewhat more.

Ohh yahh, blower whinnne kicks azz. Remember in May!!!!!

Re: Merc 575SCI leftovers. Buy?
 

My sentiments exactly :cool:

Re: Merc 575SCI leftovers. Buy?
 

My vote would be to buy the 525 bolt on a whipple supercharger keep the closed cooling system and run all day long with 93 octane at around 780 horsepower each. That sounds like a pretty nice package bolted in front of arnesons !!!!!!!!!

Oh yeh those puppies sure look pretty

Re: Merc 575SCI leftovers. Buy?
 

If you're going to swap out motors why go with Merc at all? There are a lot of high quality builders that will out perform merc at half the cost. So go buy 4 and you'll always have spares.

Re: Merc 575SCI leftovers. Buy?
 

If it is a choice I would go with the 525's. My 575's have been a real battle but I think I'm going to win the war. :D

As with all motors, be careful who you get them from. Too many people out there selling junk. :mad: and doing crap work.

Re: Merc 575SCI leftovers. Buy?
 

I agree that Merc's pricing is crazy, but I had a bad experience with aftermarket high performance motors before. I think I'm going to stick with my 525's or posssibly see what Nor-tech's pricing on their 625 package is. I'm not really swapping out, this is a new boat being built right now. Thanks for you input Mr. Velocity.

Re: Merc 575SCI leftovers. Buy?
 

How much $$$ for a 575SCI blow-out special?

I have not heard about them. Are they really discounting them heavily?

Re: Merc 575SCI leftovers. Buy?
 

$2500.00 over my 525's.

Re: Merc 575SCI leftovers. Buy?
 

Times 2= $5,000 :D

Re: Merc 575SCI leftovers. Buy?
 

I would have a hard time not looking at the new Ilmor and Teague package. They have the same dollar to horsepower as the merc's and the same one year warranty and they have excellent customer service on both the components.
Merc may have some new competition. At the 2005 Miami boat show Ilmor will unveil their new package combo with an estimated 600 to 700 hp fuel injected V-10.
Definitely worth looking at.

By the way, the V10 is all aluminum and weighs approx. 400 pounds less than merc and is also enclosed cooling.

Re: Merc 575SCI leftovers. Buy?
 

525's great motors
BUT
you are not gonna stay with a 575 that pushes out 698 like mine turn key reliable idleing motors,,, would be an expesive programs to get 200 hp ea out of them..

575's easy to do big injecters inner coolers pulleys thermostats remap computrs

Re: Merc 575SCI leftovers. Buy?
 

I WOULD CONSIDER RESALE AN ISSUE. PERSONALY I WOULD BUY 525s THE 575s JUST CANT DELIVER THE PERFORMANCE. NOW 600s MERCS OR 850s OOOOOYYYYEEEEAAA :evilb:

Re: Merc 575SCI leftovers. Buy?
 

625 ILMORS, worth the look!

Re: Merc 575SCI leftovers. Buy?
 

You can also buy the 575 from Merc as a long block without superchargers. Excellent parts in that long block and ready for supercharging. We can provide a supercharging system for that engine, with EFI if you want, through Nortech and they will install on your new boat. Then you will have a reliable 800 HP to go with your Arneson's.

If you are buying through Randy Sweers, ask him about Rtech Performance. You know you need more power. :D

Re: Merc 575SCI leftovers. Buy?
 

HANDS DOWN...525's

The reasle will be better down the road as well since the 575's are discontinued.

Re: Merc 575SCI leftovers. Buy?
 

my 575sci have ran perfect since day one.. add a few mods & you will blow away both 525 & 625s blowers rule..........

Re: Merc 575SCI leftovers. Buy?
 

Wasn't there an issue with those Weiand's

Re: Merc 575SCI leftovers. Buy?
 

Forgot....Much more fuel efficient too

Re: Merc 575SCI leftovers. Buy?
 

Some of you mentioned the cloesd cooling being a plus. Is this becase of salt water applications?

Re: Merc 575SCI leftovers. Buy?
 

Guys, this thread is over 1 year old!!! :D

Re: Merc 575SCI leftovers. Buy?
 

All about me was already taken when i went to get it over a year ago.It's probably some arrogant powerboater.lol

Re: Merc 575SCI leftovers. Buy?
 

I'm re-powering my 74 27' Magnum with a single MV10-625 from Ilmor with an Arneson ASD6. I'd highly recommend an Ilmor over anything else. You can't beat the closed cooling and the savings in weight. Michel Berryer at Ilmor, would be the best person to talk to. Tony