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Thread: 225x questions

  1. #91
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    Quote Originally Posted by Greg G View Post
    It won't work but hey, I'll enjoy watching you try. I like trailblazers.
    Not the help I need! I have tried enough. Why will leaving poppet plumbed not work? My understanding it helped keep water to top of motor at idle until stats popped and was relief valve when water pressure built with speed. Is it just going to dump water back into adapter in a loop?
    Dave Hensley


    1986 XR2002 /12" Mariner and string steering
    18' Pugh Hydro
    1992 XTB-21/225 ProMax

    The barn is emptying out!!!

  2. #92
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    this is still how your water routing should work
    only instead of top of the engine block to poppet valve
    you have an exhaust cover to poppet valve cover hose
    you should have water coming out of that hose if you pull it lose from the poppet valve cover
    if not
    there is a blockage from your water pump to the engine block ( inside copper tube or the adapter plate )
    or the copper tube is not sealing properly
    Attached Thumbnails Attached Thumbnails scan0005.jpg  

  3. #93
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    Quote Originally Posted by Go Time View Post
    Dave, stick the one pc adapter on the engine. It won't hurt to use it as is to prove or eliminate the adapter plates as the problem, and get any other gremlins worked out. Just dump the port thermo like the stbd. and plug the lines off the poppet. If you still got problems, its probably not the adapters....I know its a lot of work, but at this point you're running out of options. While the powerhead is off, I check the main supply cavities you could not check pulling the heads & divider plate in case there are more impeller parts floating around.
    Go Time, I'm re-reading your post and I think I getcha now. I believe you are saying to try the 1 piece adapter just in Dave's shop to trouble shoot the rest of the potential issues. I can see this given he has a 1 piece sitting there for free.

    Which one piece adapter do you have Dave? Off a 280? You could try it. Leave the 120 degree T-stats in the X powerhead. I believe you bought two brand new 120's. If you did, I believe they will have the tiny air bleeder hole in them unlike the older model stats. T-stats will help you to build some heat while in the deep bucket and you already own them.

    One the other side of it, and just to have a Pro and Con. If you bought the correct adapter for a 225X new, what would that cost? I have no idea but I'd want to ask Lee S before you go into trying the 1 pc route and put all the hours into that.

    A generic statement on the 225 X is that they run cooler than the Promax 225 to begin with for some reason.

    Good Luck ...............

  4. #94
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    I have a 260 one piece that has the JSRE dry stack mod. Was thinking that I had heard the two dump holes in the rear cavities need plugged for this application. The two holes in the main plenum are restricted. The two dump hoses are restricted with 1/8" orifices with aluminum plugs in the hose ends. Looks like this whole deal would be perfect if the poppet could be used. Regulate cold starts with adjustments in dump tubes off of adapter and when water pressure builds have the poppet, or modified version of the poppet dump water to can or out of motor through another tube. I guess I am missing something but at speed I don't know if t-stats and restricted dump tubes will vent enough water.
    Bottom line is what I have is not working. Pulling the two piece adapter might reveal something I have not found yet. Using the one piece might let me troubleshoot idling and other issues that I think I still have.
    Last edited by LongShot; 10-31-2015 at 09:39 AM.
    Dave Hensley


    1986 XR2002 /12" Mariner and string steering
    18' Pugh Hydro
    1992 XTB-21/225 ProMax

    The barn is emptying out!!!

  5. #95
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    How much would a new 225X two piece adapter cost?

  6. #96
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    Quote Originally Posted by Greg G View Post
    How much would a new 225X two piece adapter cost?
    One piece, yes they list a one piece, $1550 new. Two piece the bottom is NLA and top is $260 new.
    Dave Hensley


    1986 XR2002 /12" Mariner and string steering
    18' Pugh Hydro
    1992 XTB-21/225 ProMax

    The barn is emptying out!!!

  7. #97
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    Dave, the poppet will be completely inoperative with the one PC adapter because the poppet discharge is not sealed off in the one pc plate. Look at it close and will see what I mean. My suggestion was just to use the one pc adapter to test and see if the flow blockage you seem to be experiencing could be eliminated. If you call Lee Sanderson, Lee may have a used 2PC Promax adapter plate at his shop...I thought I saw one last time I was there. DO not run the engine under load with the one pc adapter unless you are willing to spend the time to get the cooling right. I did it with a promax and it takes a lot of "adjusting". You would also need to pull the heads to put in flow diverters like in the HP motors. I used a 280 plate, plugged the dumps and redrilled them(2 holes) 1/4 inch and then used a poppet cover with a dump hose and used the dump hose to adjust temp. Some times no flow and some times 1/8" orifice, depending on inlet water temp. It is also recommended that some of the block drain holes be relocated (there is a photo of this on a thread here somewhere).
    But the best approach is the 2 pc adapter.
    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

  8. #98
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    .
    I tried to do the same thing with the 1 piece adapter off my 280 and it never worked correctly. It created (even after mods) all kinds of cooling gremlins on the 225X powerhead.
    Very frustrating and a lot of time and money spent! One other thing that you might ask Lee is if he can get you the adapter that is used on the 2.5 200XS. If I remember correctly the Opti might use the same one as an X. He has the connections to Merc race to ask them if the EFI X and Opti XS are the same.

  9. #99
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    Quote Originally Posted by LongShot View Post
    One piece, yes they list a one piece, $1550 new. Two piece the bottom is NLA and top is $260 new.
    That is very interesting that Mercury has a one piece adapter for that 225X motor still available. Hmmm. The 200XS Gen 2 is only offered in 15". Hmmmmmmm.
    This thread is like the Hunt for Red October. As an fyi there is a guy who wants $6,750 for an entire 225X just to give you a parameter.

  10. #100
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    Talked to Lee and he said the 200 EFI two piece adapter should work fine!!! I am pulling everything down including the two piece plate. I will look at routing of dump from poppet one piece vs two piece. G time when you say it is not sealed off do you mean it can't dump or it doesn't get to build pressure so that it can dump and is just by-passed? I would be willing to modify the plate to make it work if need be and possible. I will check part numbers shown for 225x one piece vs. 200 XS ROS. I know the water routing on the 2013 ROS I had was extremely strange looking. I think those motors have a narrow, long tuner like an old XR2. Heard they wouldn't fall out of a tree with a short one.

    I picked up a 250 ProXS Friday that supposedly has a sleeve that has turned in it and just needs that sleeve and possibly a new piston in that hole. It is calling my name but I sure would like to get this 225X sorted out first.
    Last edited by LongShot; 11-02-2015 at 11:45 AM.
    Dave Hensley


    1986 XR2002 /12" Mariner and string steering
    18' Pugh Hydro
    1992 XTB-21/225 ProMax

    The barn is emptying out!!!

  11. #101
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    Dave, the separate chamber (triangle shaped) in the adapter plate that the poppet dumps into is not there and the poppet sees the same pressure/water on both sides. If Lee said it should work, I would take it to the bank. Like I said, the differences I saw were minor. When you check the adapter plates...make sure you check the gasket between the two adapter plates is the right one. Hope you figure it out Dave...
    Go Time
    2003XS GS 225 Promax/ 260 / 280
    26 Regulator twin 250 EFI

  12. #102
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    you can have a look at the adapter in this
    Attached Thumbnails Attached Thumbnails SST200(1).pdf  

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  14. #103
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    New style gen 2 200xs had the smaller exhaust ports in the top of the 0late and it does run the little small square tuner

  15. #104
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    Hmmmmmmmm ......................
    Attached Thumbnails Attached Thumbnails 2010-2.5 200XS.jpg  

  16. #105
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    Ros model is different
    Click image for larger version. 

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