merc 525SC's
 

tell me the good an the bad about them. i may have a line on a pair of take outs that the owner is re-powering to bigger HP motors. they are 2000's i believe, average use and hours but will need a freshining.

Re: merc 525SC's
 

I have a pair in my p-38 scarab! Great engine,always turn key!Use them in salt and fresh and never had to do anything except the regular stuff,tune up and oil changes!I added chillrers and pulleys aswell!200 hrs now and no signs of any problems !

Re: merc 525SC's
 

A buddy has trips in his 42' Fountain. Sweet motors. Also turn key.

Re: merc 525SC's
 

jjones- what gains did you see with the chillers and pullys. i have been told that is a good addition. i do like the way these sound and i know the history of the boat they are in since new

Re: merc 525SC's
 

YOU DOG !!!! ....I knew you'd be up to something...!!!..haven't splashed yet ...LOL....GREAT MOTORS...DO IT DO IT.. :evilb: :drink: :cool:..I GAINED 14 MPH... went from 22'' props to 28''.....runs stock till 4k..them hang on !!

Re: merc 525SC's
 

heres the fresh bilge...

Re: merc 525SC's
 

:D :D getting a 38 Donzi in for a bunch of stuff an while its here we may do a Sterling 800/ Konrad Ace conversion. going to look into buying the drive packages after its done.

bilge looks good Dave. when ya gonne be ready for the water? i STILL havent touched mine yet but have reserved next week to get survey and maybe splash it at the end of the week. :cool: :cool:

Re: merc 525SC's
 

Glassdave, I have a friend with 525s and they are very reliable. Lots of wot time, and over 400hrs of trouble free operation. We added chillers and pulleys and picked up a minimum of 5mph in a 33ft boat.

Re: merc 525SC's
 

If you have to freshen them, call Tyler Crockett, he can sell you a cam package that can make 600 hp without an intercooler. This is one sweet package. Ran like EFI. He sold me the components as cheap as I could get anywhere. Will require mild head work.

Re: merc 525SC's
 

I should be ready in a week or two...takin my time...motors are ready...still have to finish the Hydraulic helm..

Re: merc 525SC's
 

are the 525's based on the 454 or 502?

Re: merc 525SC's
 

454

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!!! :drink:

Re: merc 525SC's
 

Great motors :D

Re: merc 525SC's
 

good engines... ck for small blower pullies.

Re: merc 525SC's
 

kinda what i was thinking, there nice and whiny to :D




good info guys. :cool:

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.

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!!!

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 $

Re: merc 525SC's
 

thanks again guys. Airpacker do you have a part number for that kit by any chance?

Re: merc 525SC's
 

Bling..bling..

Re: merc 525SC's
 

Good package.....

Installed new sea strainers and fired 'em today. First crank up of the season....

Re: merc 525SC's
 

Here's the set in my 31 sonic that's for sale...glad you started this thread,I have a guy interested who's scared of the blowers...it's been a very reliable package(with exception of replacing both blower shafts couplers and seals) and I've been trying to convince this potential buyer the same...I told him he might have to go through the heads soon on one of the motors(250hrs),but well worth it for this setup...this package rocks!!!

Re: merc 525SC's
 

good info. all i have ever heard was good stuff about them and i do like the blower whine :D :cool:

Re: merc 525SC's
 

I have had two pair, And would buy two more, would like a little more hp but who doesn't. I see in this post Tyler C. has a cam that will get 600 hp , I will have to check into that.