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  1. #16
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    I think when the history of outboard motor development is written the 225 ProMax platform will go down as the best all around package ever assembled for 18-21' fishing/sport boats. I have one on my XTB 21 and the only thing it requires of me is good gas, good oil and a charged battery. I have complete faith when I go out it will get me back. After many years of 260's and having to make sure i had a tow rope in the boat it is comforting to have it. Of course my demand on the motor has lessened a bit with age too......those 260's caught heck every time out!!!
    Dave Hensley


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

    The barn is emptying out!!!

  2. #17
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    The constant wrenching to upkeep, not user friendly, coming home with scattered metal more then I care to remember, the big expenses on parts when things went wrong or every 100 hrs plus the labor did get old quickly for me! Like mention just the cost of renic if all else is fine except if you or someone got careless keeping up with rings....

  3. #18
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    Quote Originally Posted by catfish123 View Post
    I have had both a 225X and a 280 ROS on my Allison XB2003 and on that boat, there is only about a 5 mph difference. The 280 is MUCH quicker out of the hole, and it has much more mid range punch. I would not expect to see a 15 mph difference.
    I had both a 280SS and a 225 Promax and we put them both on the same dyno because I was curious and wanted to try and know as much as Ghost. These were both stock motors. The 280 pulled 282hp over multiple pulls and the Promax 225 pulled 246hp at 6500rpm.

  4. #19
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    Agree

  5. #20
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    Quote Originally Posted by tux974 View Post
    Not personally familiar with these boats but interesting data!
    So the XB with a 2.5 SS (280ROS 15") all things being equal is only 8 faster and the same for the XTB with a 3.0L XS with that type of documentation for me a good 225PM would be a no brainer!....
    I always knew the 225PM was my motor......
    My 225PM is the most impressive motor ever owned. Out of the box it was dead even with the 245hp with a CLE vs 225PM and a torquemaster on the BAJA. Also uses half the fuel.

    Dave
    1980 Cougar 19 tunnel,90 2.4L Bridgeport EFI in middle of restoration.
    1988 BAJA Sunsport 186, 96 225 Pro Max
    79 12' Auminum, 95 Merc 9.9
    RIP Stu
    "So many idiots, so few bullets"

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  7. #21
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    Yah. That's what I'm thinking about. The cost of admission and upkeep on the 280 just doesn't seem to be worth it to me. I can drop my Promax on the 280 offshore mid and still sound nasty and be pretty close to top speed. I'm not looking to bust 100 for any reason. That's put of my blood now that I've gotten older.

  8. #22
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    Quote Originally Posted by Dave Strong View Post
    My 225PM is the most impressive motor ever owned. Out of the box it was dead even with the 245hp with a CLE vs 225PM and a torquemaster on the BAJA. Also uses half the fuel.

    Dave
    IMPO, it is a motor with perfect weight to power ration and for the most part relatively simple......

    Quote Originally Posted by dondante View Post
    Yah. That's what I'm thinking about. The cost of admission and upkeep on the 280 just doesn't seem to be worth it to me. I can drop my Promax on the 280 offshore mid and still sound nasty and be pretty close to top speed. I'm not looking to bust 100 for any reason. That's put of my blood now that I've gotten older.
    Heck, you will probably end up putting a few $'s in your pocket and still have some respectable performance according to the personal plus actual data/info guys have posted...........

  9. #23
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    As mentioned before it is possible to swap the ProMax right over to the one piece adapter on the 280 mid.....BUT.....you will have much less pain and heartache keeping h powerheads and adapters married. The Offshore down housing is heavier and had no performance advantage over the bass mid. I would drill the can of the bass mid, if not already done, and ride.
    Dave Hensley


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

    The barn is emptying out!!!

  10. #24
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    I already pulled the can out of The Promax mid.

    I'm not sure the performance of the 280 is worth the price of admission other than having the bad boy on back of my hull for bragging rights. Lol

  11. #25
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    If you are ever "lined up" with an Allison that has a 280 on it, your opinion may change as quickly as it lets you sitting.................

  12. #26
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    If you put the pm on the one piece plate you'll need to change the cooling routing on the pm or you won't get enough heat to the motor

  13. #27
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    I love my pm and you can get some goodies that make it even more potent that just bolt on relatively cheep. If your not interested in busting 100 then the 225 will be trouble free good power. if you like to hot rod i mean really hot rod around the 280 is the one. You can still beat 95+% of the boats out there with the 225 on an 03 just not another Allison with a 260/280 will be about it.

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  15. #28
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    Acceleration is a lot of fun. I have a 225PM now and would not want a 280/260 due to the extra maintenance, but I get acceleration.

    Just don't run the 280 and the 225 will seem fine.

  16. #29
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    Quote Originally Posted by David View Post
    Acceleration is a lot of fun. I have a 225PM now and would not want a 280/260 due to the extra maintenance, but I get acceleration.

    Just don't run the 280 and the 225 will seem fine.

    Thats actually the best advice yet. haha You wont know what your missing if you dont run the 280. Good one David!

    My 225 is a rocket ship on my 03 to me also. But I would keep the 280 for a lot of reasons. One is in about 4 or 5 years you might want to see what that difference is. Two, you own it now and wont have the expense of buying one to see the difference. That gives you lots of time to have a 280 fund put aside to get it freshened up and ready to roll on a stand for when that day {probably} will happen. 3 if your 225PM ever has a problem you will have a backup {spare} and wont be out any time boating except to for the few hrs it takes to clamp it on. #4 its worth more freshened up than with 150 hrs. it would be a shame to sell it as is. They are getting rare and a great motor and will always hold there value.

  17. #30
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    It sucked to go from a Drag to a ProMax on my GS! Except of course for the price of race fuel and the overall fuel consumption of the Drag. With the prices these boats go for new or used, the maintenance on the NiCaSil motors seems okay to me. Like Longshot said, when you have a Hypo motor on one of these boats, it is hard not to hammer it, because it feels sooo good!
    But on my Viper, the 200 ProMax is wonderful compared to the ole Bridgeport, especially when docking or trailering.
    Last edited by Hank W; 05-04-2016 at 12:19 PM.
    HydroStream "Spirit of '76" Bicentennial Viper - '96 2.5 200 Pro Max, 15" smooth back mid, SM
    '92 Allison 2003 Grandsport XS - 225 ProMax/20" mid & Sporty, 11" setback
    Newish to me - 2002 StingRay 240LR with a Mercruiser 350 throttle body EFI 260 HP/Bravo 3
    SOLD - 1989 Wellcraft Elite 220XL w/ Mercruiser 350 Magnum

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