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  1. #61
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    Quote Originally Posted by panther150 View Post
    The promax is a steel sleeve motor and will goo much longer on a rebuild, 400 to 500 hours are not uncommon.
    do you know the "real" horsepower the promax puts out?

    any other suggested options for a "less work, more reliable" merc motor that is still strong and lite enough for this hull?

  2. #62
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    gentleman, if overall go fast was the goal on this hull and the little unimportant things in life like time, money and reliability were of no significance, would the 2.5 260 efi be the clear merc winner? is there anything more for lite hulls before modifying?

  3. #63
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    Quote Originally Posted by dusty69camaro View Post
    gentleman, if overall go fast was the goal on this hull and the little unimportant things in life like time, money and reliability were of no significance, would the 2.5 260 efi be the clear merc winner? is there anything more for lite hulls before modifying?
    280 merc would be the clear merc winner

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  5. #64
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    The pro Max are supposed to be mid 240's at the prop.
    1991 Hydrostream AE-21 2000 Evinrude modd

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  7. #65
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    A pro max should get you into the 90's with proper setup and prop on the AE-21 . The 280 should get you tripple digits with a 28 et .
    1991 Hydrostream AE-21 2000 Evinrude modd

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  9. #66
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    My old AE-21 ran mid 80's with a bone stock Merc 2.5L 200, Offshore mid, Trophy Plus 26, 12" of setback!
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    J-Town Hot Boat Team
    Checkmate 2800SX/Twin Merc 2.5's
    Checkmate Pulsare 2400/Verado 275

    Past Boats:
    Checkmate Starflite/Merc Pro XB250
    Canadian Edition Hydrostream AE-21/Merc 2.5
    Checkmate Pulsare 2100/Merc 225Xri
    Hydrostream Valero YT Bowrider/Merc 175
    Talon T-21/Mercury Racing 2.5 Carb
    Sleekcraft ModVP Bowrider/Evinrude 225 Vindicator
    Velocity 230/Mercury 454 Magnum
    Scout 172 Sportfish/Yamaha 130
    SeaRay F16 Jet boat/Mercury SportJet
    SeaRay 17' Seville/Merc I/O

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  11. #67
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    One of the nicest, unmolested , best rigged AE-21's left in existence Steve
    1991 Hydrostream AE-21 2000 Evinrude modd

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  13. #68
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    My hst blows out at 86mph with a stock 200. Propshaft 3" below.... Time for a nosecone and jacking it up. Should run 90plus easy i guess.

    A light to moderate ae21 should do 90 with a good setup and a promax.

    Jupiter: How much rpm's were you running with the 26trophy? Did you try other props too? 26pitch seems small.

    Whats a good cruising prop and to carry some weight? I have a 28 chopper and 29 srx. Not great with a heavy load.
    http://www.geocities.com/fletcher_arrowbeau

    Fletcher 17F6
    Hydrostream HST 20F

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  15. #69
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    Quote Originally Posted by bigboy View Post
    My hst blows out at 86mph with a stock 200. Propshaft 3" below.... Time for a nosecone and jacking it up. Should run 90plus easy i guess.

    A light to moderate ae21 should do 90 with a good setup and a promax.

    Jupiter: How much rpm's were you running with the 26trophy? Did you try other props too? 26pitch seems small.

    Whats a good cruising prop and to carry some weight? I have a 28 chopper and 29 srx. Not great with a heavy load.
    a bravo1 is always my cure, for a load carrying prop,and a good cruise speed,with explosive acceleration.a mazco re4 would run well too.

  16. #70
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    Quote Originally Posted by dusty69camaro View Post
    do you know the "real" horsepower the promax puts out?

    any other suggested options for a "less work, more reliable" merc motor that is still strong and lite enough for this hull?
    The last one we dyno'd was around 246hp, fresh built,can't recall if it was max or shanes,1 runs high 90's on a v king. The other is close to 100 on a charger.

  17. #71
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    Quote Originally Posted by dusty69camaro View Post
    so the bp's and the 2.5 (245 and 260's) need preventative attention every 150-200 hours. what's the approximate cost to have done professionally?

    does the promax require this attention as well at some point, if so at what sort of hours, or do you just run them till they don't anymore?

    (thanks for everyone's patience with this 101)
    No the promax is mercury's user friendly , steel bored, fishin' motor on steroids.needs no special attention to rings and nicasil linings. Needs good hi test gas and good oil to live a long life. If you keep it around 64-6800 rpm, service the injectors regularly, it is a very reliable unit.it's your best bet for an ae21 family/recreational boat. Like jupiter pulsare said, his ran 80 with a 200, so if you're really on a budget , you cant beat a strong 2.5 200 either for fun cruisin. You have all winter to find a good motor, just keep asking questions before you lay your cash down. Alot of very helpful , knowledgeable guys on here.
    Last edited by Varmint; 11-08-2016 at 09:22 AM.

  18. #72
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    Quote Originally Posted by bigboy View Post
    My hst blows out at 86mph with a stock 200. Propshaft 3" below.... Time for a nosecone and jacking it up. Should run 90plus easy i guess.

    A light to moderate ae21 should do 90 with a good setup and a promax.

    Jupiter: How much rpm's were you running with the 26trophy? Did you try other props too? 26pitch seems small.

    Whats a good cruising prop and to carry some weight? I have a 28 chopper and 29 srx. Not great with a heavy load.
    Yeah, my HST went 88 mph with a worn out 200hp 2.4L motor and CLE gearcase (26p Chopper II); the only other one I've driven went 99 mph with bridgeport (30P maybe? Spinelli).

  19. #73
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    Quote Originally Posted by Varmint View Post
    a bravo1 is always my cure, for a load carrying prop,and a good cruise speed,with explosive acceleration.a mazco re4 would run well too.
    4 blade? Bravo xs with dual vent holes?
    http://www.geocities.com/fletcher_arrowbeau

    Fletcher 17F6
    Hydrostream HST 20F

  20. #74
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    Quote Originally Posted by bigboy View Post
    My hst blows out at 86mph with a stock 200. Propshaft 3" below.... Time for a nosecone and jacking it up. Should run 90plus easy i guess.

    A light to moderate ae21 should do 90 with a good setup and a promax.

    Jupiter: How much rpm's were you running with the 26trophy? Did you try other props too? 26pitch seems small.

    Whats a good cruising prop and to carry some weight? I have a 28 chopper and 29 srx. Not great with a heavy load.
    bigboy, I can't remember exactly what rpm's I was turning but probably about 6400-6600 rpm. It's probably buried in one of my old AE-21 threads. I also ran a DAH worked Mercury Chopper 28 for top end runs. For everyday use with 2 plus people, full tank of gas cooler, gear, etc. I ran the Trophy Plus. It made the boat jump out of the hole and kept the boat on plane at lower speeds.
    J-Town Hot Boat Team
    Checkmate 2800SX/Twin Merc 2.5's
    Checkmate Pulsare 2400/Verado 275

    Past Boats:
    Checkmate Starflite/Merc Pro XB250
    Canadian Edition Hydrostream AE-21/Merc 2.5
    Checkmate Pulsare 2100/Merc 225Xri
    Hydrostream Valero YT Bowrider/Merc 175
    Talon T-21/Mercury Racing 2.5 Carb
    Sleekcraft ModVP Bowrider/Evinrude 225 Vindicator
    Velocity 230/Mercury 454 Magnum
    Scout 172 Sportfish/Yamaha 130
    SeaRay F16 Jet boat/Mercury SportJet
    SeaRay 17' Seville/Merc I/O

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  22. #75
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    Quote Originally Posted by JUPITER PULSARE View Post
    bigboy, I can't remember exactly what rpm's I was turning but probably about 6400-6600 rpm. It's probably buried in one of my old AE-21 threads. I also ran a DAH worked Mercury Chopper 28 for top end runs. For everyday use with 2 plus people, full tank of gas cooler, gear, etc. I ran the Trophy Plus. It made the boat jump out of the hole and kept the boat on plane at lower speeds.
    What did it ran with the 28? Did you try other props? Would be cool to know what prop to buy or more important which not to buy!

    Thx
    http://www.geocities.com/fletcher_arrowbeau

    Fletcher 17F6
    Hydrostream HST 20F

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