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  1. #106
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    I asked him and am still waiting on a reply. However they usually correct the flywheel hp to include transmission loss within the software when they run such a test..

    Price is close to a 300 XS but has no warranty..

  2. #107
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    $21K
    No 20"

  3. #108
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    Rumor always was from mercury at 240 and always felt is powerhead horsepower.
    Doubt the test is allowing for gearcase loss although there is data acquisition that can do that. Usually a 10% loss for Gearcase which would put it around 215 or so.
    Were was this test done?

  4. #109
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    For comparison, since a 175 ProXS seems to be the highest HP consumer "lightweight" 2.5 outboard available, I wonder what one of those makes at the prop, or crank?

    BTW, I'm looking for a 20" one, buy or trade, and have a 25" 250 Pro XS to trade, or sell.

  5. #110
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    Pretty sure the 175xs has the smaller five pedal reed front half and probably right around 200 powerhead horsepower.

  6. #111
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    i know the 2.5XS block shares ports with the 280... so its safe to say minus parasitic loss for compressor and higher rotating mass its well within 250-260 HP.. id have to build mine but its getting scavenged to do my 3.0L build because im broke and the fishin boat is more important than a 1 off cool motor at the minute i may one day do a sport jet 240 front half down draft intake and ECM on it and let it eat.. but until then ill just stand on my complete 2.5XS setup for now....
    Last edited by 150aintenuff; 05-31-2016 at 05:53 PM.

    4-16-2014. 25 years old today... the fishin boat doesnt look to bad for a classic does she


    things that were are no longer as they are today...

  7. #112
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    4 pedal rubber coated and 192 hp... yep

    4-16-2014. 25 years old today... the fishin boat doesnt look to bad for a classic does she


    things that were are no longer as they are today...

  8. #113
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    Quote Originally Posted by Sleek Jr View Post
    For comparison, since a 175 ProXS seems to be the highest HP consumer "lightweight" 2.5 outboard available, I wonder what one of those makes at the prop, or crank?

    BTW, I'm looking for a 20" one, buy or trade, and have a 25" 250 Pro XS to trade, or sell.
    192 HP at prop they are a mean 175 but no 200...

    4-16-2014. 25 years old today... the fishin boat doesnt look to bad for a classic does she


    things that were are no longer as they are today...

  9. #114
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    not sure about the 250-260 HP, they race in texas in mixed fleet with sst120 ( 200hp) and stock 200 omc's

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