Thread: 2003 250XS re-sleeve questions
09-26-2013, 08:54 AM #1
2003 250XS re-sleeve questions
Thinking of building up my 250XS over the winter dbr is getting close to having the kit out. It is an 2003 block in the first serial range of this motor, Mercury is the only piston available for this motor and it seems that one serial group only and it does not sub to the next group. The next group and on uses a different piston, as far as I know they are still domed with a round not oval port. The rods sub to the latest and all brgs remain the same. I am a little confused as I do have the original art pistons from the motor and they all have the later piston number cast into them.
Since I am re-sleeving this block I am thinking about installing the later sleeves from a 2004-2007 motor to allow for use of the more available piston selection in the market, Talking with Jeff at advanced the conclusion we make is that the only difference is the exhaust port timing. I will have re-mapping done and installing the latest compressor and coils. I have pretty much two sets of everything to play with on this motor.
2003 250XS exhaust port dims - Top to deck = 1.760", Bottom to Deck 3.055", Width 2.355" (mine measures 1.770, 3.060 and 2.36 roughly)
2004 & on that I can find specs for - Top to Deck = 1.775, Bottom to Deck = 3.070", Width 2.340"
What's your thoughts, re-sleeve with stock and use the only pistons available or re-sleeve with new style and obvious changes. I cannot find any dyno info between an 2003 and 2004 and later.
Last edited by crankbearing; 09-26-2013 at 11:41 AM.
09-26-2013, 06:47 PM #2
Talk to Dave about his custom oversized sleeves and pistons (big bore kit)!
09-26-2013, 08:08 PM #3Platinum Team Member
- Join Date
- Jun 2004
- Morgan City, LA
The older 250s ran a lot harder than the newer ones. They are 92 oct the newer is 87 oct."If I died with a body that was not completely wrecked... I would feel like I completely Wasted it"
Matt "The Condor" Hoffman
2012-2013 DSRA PRO STOCK HIGH POINTS.
2013 DSRA SUPER STOCK HIGH POINTS.
09-27-2013, 06:46 AM #4
Does anyone know what year of 250xs hydro tec used for the base testing. These are pretty impressive numbers. http://www.yamaha-rebuild.com/Mercury%20250XS.htm 294hp at 6K with a stock 250. I will talk with Dave about the big bore kit, Joe told me to hold off for about a month, they are testing now.
09-27-2013, 07:38 AM #5
It was a 2003. I bought it off the boards here and sent it to him for A friend with a stroker bass boat.
09-27-2013, 10:50 AM #6
Now I'm toying with the idea of upgrading to twin 250xs for my Motion and this would be great having DBR kits available for 250xs's.
Thanks2001 Velocity 220 - 300xs by DBR - Sold
2001 Motion 25 - 200xs's
09-27-2013, 03:07 PM #7
10-08-2013, 07:13 AM #8
I got the new sleeves from advanced and pulled the old ones out of the block well except for #6 it is being at PITA. I guess I will have to cut that one out, The other 5 sleeves were the 03 style and #6 is a new style. I compared the old 03 pistons to the new ones they all measure EXACTLY the same, the difference is they reinforced the area under the dome in the head with two addtn'l bosses added and they are heavier and why merc says to change all 6 in the manual if you are going with design 2. The old sleeves have straight exhaust port sides while the new ones are on an angle heights are very close to the same, I dropped one sleeve in and I will have some port matching to do at the bottom of the window and in the corners but very little. Can't use the DBR big bore kit with DI only with case injection. Does Tony B do rails as well as injectors ? If not where can I send the rails? I need a port head if anyone has one, I also have an extra starboard head to trade if you need one. Who has 3.0L opti head stud kits - GOOD ONES.
Last edited by crankbearing; 10-08-2013 at 07:35 AM.
10-08-2013, 09:46 AM #9
Don weed will do your entire fuel system if tony won't. http://www.europeanmarine.org/
Gary bleish is the only one I know of making head stud kits. His screen name is Nikonman or Liberator21.......
last I knew DBR was working on a big bore dfi kit... I wonder were they are in the testing and development. I knew they had perfected the efi side.
10-08-2013, 06:11 PM #10
Sleeves are installed, dropped it off to get decked tonight. I will port match it and clean up all the rough casting on the weekend. I also attached a pic of the old style and new style sleeve. There is a lot of space behind the corners, I am wondering how it would respond if I opened the ports to actually match the opening in the block. Thanks for the info Todd D I talked with Don today on the fuel system and ordered a set of studs from Gary. Maybe I will get this together for one run before SNOW but not likely. Gotta get the ecm and flywheel from Simon, waiting for parts from Fond du Lac 2-3 weeks minimum, half the stuff I need have never been in stock in Canada's warehouse.
Last edited by crankbearing; 10-08-2013 at 06:18 PM.
10-23-2013, 11:29 AM #11Junior Member
- Join Date
- Feb 2003
I'm curious about the DBR kit as well.
10-23-2013, 09:45 PM #12
Keep the pics coming during the build. ThanksCawley
10-24-2013, 06:17 AM #13
I just picked up the block this week after being decked (if I ever get time setup my mill I won't be sending them anywhere) had to remove .0035 of each side. got my pistons yesterday, interesting the latest 843200T13 piston for a 250xs subs up to the same piston as a 300xs now. I am swamped with winterizing and shrinkwrap right now, so not much getting done on it. but I will snap pics at each stage. I have to get the fuel system boxed up and sent out pretty soon. I have three compressors for this thing, I was gonna take em apart and rebuild them but then I know pro marine is looking for cores and I have quite a few so maybe I can get one of the latest ones NEW for exchange of some cores. I have always bored to within .006-8 of finish and then honed out to withing is .0002 or so and plateau finish to size, but I have been reading that a lot of shop now are boring to within a .001 or so of finish and plateau finishing to size and that is how they are getting the no break-in required on most of the new stuff, Not sure which way is better at this point still reading up on it. I have called Taylor a couple times in the last two weeks with no reply, I am thinking of picking up one of the 15" mids my chum has and dropping it off at the casting plant I use and have them make me one if Taylor cannot supply. I got my head studs from Gary this week as well, Thanks Gary, nice job on those and great instructions as well.
Last edited by crankbearing; 10-24-2013 at 06:25 AM.
10-24-2013, 10:03 AM #14
10-24-2013, 10:05 AM #15
Try emailing Taylor marine if you can't get a hold of them pm me and I can get you a can.