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  1. #1
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    Opinions on older style trim pump for 2.5 merc...pic included

    Got this pump along with a blown motor I bought for parts... wondering if it's worth keeping or should I get rid of it...everything works great, has new solenoids, new trim lines...no leaks etc...would be using it on a 2.5L carbed merc. Thanks.
    Attached Thumbnails Attached Thumbnails 20170311_132932.jpg  
    15.5 cobra 175 hp merc - sold
    18 tahiti tiger O/B 200 hp merc - sold
    19 STV euro - 2.5 merc DRAG
    Seebold F1 tunnel - 2.0 F1/champ

  2. #2
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    Fresh fluid, and run it till it blows.....

    83 V-King, 96 Mariner, 200 hp ff block 2.5 w/a 28p choppa
    We gotta clean this liberal mess up, VOTE TRUMP TO MAGA!
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos

  3. #3
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    What he said.
    those old pumps don't die.....or at least the 2 I've had wouldn't.
    they aren't fast but they last.

  4. Likes Magcat 62 liked this post
  5. #4
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    Quote Originally Posted by XstreamVking View Post
    run it till it blows.....
    Quote Originally Posted by Tomanytoys View Post
    they aren't fast but they last.
    Josh Peterson

  6. #5
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    I've used 'em for years! They can be run on 24v to speed'em up and work extremely well if you change the Pump to a Mercruiser pump.
    Motor, bracket, can, etc. will all interchange but you jst need the pump itself!
    Mercruiser Pump + 24v = Rock'n Roll!!!
    WillySteve Hendricks



    20XDC Bullet/Modified Merc 260
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  7. #6
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    Great! Thanks for the input! I'll run it with my set up for now!
    15.5 cobra 175 hp merc - sold
    18 tahiti tiger O/B 200 hp merc - sold
    19 STV euro - 2.5 merc DRAG
    Seebold F1 tunnel - 2.0 F1/champ

  8. #7
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    Quote Originally Posted by WillySteve View Post
    I've used 'em for years! They can be run on 24v to speed'em up and work extremely well if you change the Pump to a Mercruiser pump.
    Motor, bracket, can, etc. will all interchange but you jst need the pump itself!
    Mercruiser Pump + 24v = Rock'n Roll!!!
    Yep, but 24v to the stocker works too! Also flush out the old motor oil and run atf or tractor hydraulic fluid...
    Josh Peterson

  9. #8
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  10. #9
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    Quote Originally Posted by nitro_rat View Post
    Yep, but 24v to the stocker works too! Also flush out the old motor oil and run atf or tractor hydraulic fluid...
    I like aviation hydraulic oil aeroshell 44 is what I use

  11. #10
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    Motorcycle fork oil. Easy to find and you can get lighter weight than atf. Mike
    Cheaters never Win !!!

  12. #11
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    Lighter the oil, quicker the Trim, less resistance?
    15.5 cobra 175 hp merc - sold
    18 tahiti tiger O/B 200 hp merc - sold
    19 STV euro - 2.5 merc DRAG
    Seebold F1 tunnel - 2.0 F1/champ

  13. #12
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    That's it!
    Josh Peterson

  14. #13
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    Yep like nitro said. Very noticeable difference compared to 30weight. Mike.
    Cheaters never Win !!!

  15. #14
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    Not just oil weight but check viscosity indexes at varying temps too.

    One of the good things about aviation hydro fluid is it is designed not to have as much variation in viscosity index with temp changes as traditional "tractor" hydro fluid.

    Less variation means more consistent trim timing

  16. Likes nitro_rat liked this post
  17. #15
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    Good point !
    Cheaters never Win !!!

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