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  1. #1
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    Question the big question

    Whats the difference between a mercury 150 and a 150 black max xr2? has anyone ever dynoed a 150 xr2 whats the power at the prop?
    thank you and god bless your souls

  2. #2
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    It depends on what year 150. The 150’s came in 2.0, 2.4, and 2.5L sizes. The XR2 is a 2.0L that was sold for a coupla three years in the late 80’s. Compared to a 150 black max 2.0L of the same vintage the XR2 came with a few upgrades; bigger carbs, better tuner and plate, and a few other doo dads. The XR2 made around 160hp maybe a bit more. I had a 2.0L that I ran for one year, great motor. I still have an XR2 I have yet to run
    Hydrostream dreamin

  3. #3
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    Quote Originally Posted by LakeFever View Post
    It depends on what year 150. The 150’s came in 2.0, 2.4, and 2.5L sizes. The XR2 is a 2.0L that was sold for a coupla three years in the late 80’s. Compared to a 150 black max 2.0L of the same vintage the XR2 came with a few upgrades; bigger carbs, better tuner and plate, and a few other doo dads. The XR2 made around 160hp maybe a bit more. I had a 2.0L that I ran for one year, great motor. I still have an XR2 I have yet to run
    i have a 83 150 2.0, looks like it just came out of the crate. ran 65 on a shadow bb.

  4. #4
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    xr2 had the 200 tuner and larger carbs, great little motors.

  5. #5
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    Quote Originally Posted by Capt.Insane-o View Post
    xr2 had the 200 tuner and larger carbs, great little motors.
    So what's the diff. with my Daughter's '02 150 XR6?

  6. #6
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    XR6 was a 2.5L, XR2 was a 2L. More cubes meant more torque. The XR2 had the standard gear case, 2:1 gears. The XR6 could have the standard gear case with 1.87 gears, or the smaller 4.25” gear case with 1.78 gears.

  7. #7
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    Probably wrong, but didn't the XR bass motors come with a timing adv. box that gave a few degrees more above 5700-5800 rpms?

    83 V-King, Mercury 3.0 back on the transom
    Stop wearing the face bags people. Don't be a sheep!
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos
    http://www.youtube.com/user/Snookdude87#p/u/4/eO31kWjk0cc

  8. #8
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    I had an XR4. It had a timing box that retarded the timing to limit HP. I don’t know if the XR6 was the same. If it matters, the XR4 was 2.4L

  9. #9
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    Quote Originally Posted by XstreamVking View Post
    Probably wrong, but didn't the XR bass motors come with a timing adv. box that gave a few degrees more above 5700-5800 rpms?
    I believe my Daughter's '02 XR6 shows a 5,800 r.p.m. red line!

  10. #10
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    XR2’s sound nasty, one of the meaner sounding stock fishin motors
    Hydrostream dreamin

  11. #11
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    Quote Originally Posted by Muskoka2 View Post
    I believe my Daughter's '02 XR6 shows a 5,800 r.p.m. red line!
    Correcting myself-5,600 r.p.m.!

  12. #12
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    When I had my XR4 on my SS2000, it would not pull more then 6000 rpm, even with a 24” prop

  13. #13
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    Quote Originally Posted by Muskoka2 View Post
    Correcting myself-5,600 r.p.m.!
    makes no difference with that motor.. its a new and improved "lectronic" motor that ya have no control over.............

  14. #14
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    It was possible to remove the timing box and get more rpm out of an XR4. Was the XR6 the same?

  15. #15
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    after lookin' inside tha xr4 block decided it wouldn't be worth it... had a coupla "switch box" xr6's that could easily turn up 65/6800 plus (whatever tha stock portin' would give up).. lite weight boat, little prop, 2 ta one's and jacked up a bunch..

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