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  1. #16
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    Quote Originally Posted by John2250 View Post
    I wonder what the cost of the 300r is going to be and if wildman is gonna rig a liberator with one
    I believe he stated in another thread that he has ordered a 300r but didn't know what the msrp was gonna be but costed him 22,800 with a sporty

  2. #17
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    Quote Originally Posted by Radiant View Post
    I would like to see a 350 hp version. A 350r while still remaining naturally aspirated. The 300r only requires 87 octane. To me that makes it seem like there is some power left for later versions from merc. Although I would hate to buy a 300r now for my lake and bay, only for them to come out with a 350r in a year.

    i think what will be really interesting is if it can be tuned like a Yamaha VMax SHO
    Bingo... a 15" 330ish NA on 91 with an 87 switch. Keep the weight and heat down.

  3. #18
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    Tarpon Springs, FL---Queens,NY
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    Has anyone found out if these are steel sleeve or coated aluminum bores (like SHO)?
    Quartershot T-3R 15" 3.5L E-Tec 1.62 Sportmaster


  4. #19
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    My guess is coated to get the weight down?

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  6. #20
    Join Date
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    Naples FL
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    Quote Originally Posted by baja200merk View Post
    Has anyone found out if these are steel sleeve or coated aluminum bores (like SHO)?
    I'm assuming Mercury used a plated cylinder. Mercury knows how to do it well.

  7. #21
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    Apr 2006
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    Eagle River Wisconsin
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    Looks like it only has the 1.75 gear ratio.....That could be a problem...

  8. #22
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    There's talk of 1.62 and maybe (if we're lucky) even a 15"

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  10. #23
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    Have you heard of the lower units are interchangeable with the xs? I could just keep mine..

  11. #24
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    Quote Originally Posted by stealthperf View Post
    Have you heard of the lower units are interchangeable with the xs? I could just keep mine..
    Lower is a completely new design from what I’ve read.
    Mark

  12. #25
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    If the 300R case is surfaced high enough, then they are faster then the smaller 3.0 cases. This info. came from a guy that knows and is very involved in testing and setup. I am going to rig my demo boat with a set of stock X motors if possible before the 300R motors get here so we will have a good comparison.

    Joe

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  14. #26
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    medellin colombia
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    Can you get the 300R with a 5.44 HD lower?

  15. #27
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    On a racetrack or at the lake
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    Quote Originally Posted by ratman67 View Post
    Can you get the 300R with a 5.44 HD lower?
    Yes, stated in post 3 and on their website.

  16. #28
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    Quote Originally Posted by Skip 7750 View Post
    If a 300ProXS is 10% over 300hp, how can 300R be more powerful? I believe you are only allowed to be 10% over or about 330hp. I can see that a 300R might make the power at a higher rpm, but would that be at the expense of low end torque? Before I spend $20grand+ on a new motor, I want to make sure I am making the right choice.
    300 Pro XS isn't pushing the 10% rule like the 200/225/250 models, though you're correct about the the powerband shifting upward slightly with the R's shorter intake runners and different IVC...
    300ProXS makes 296hp@5500 and 313ftlbs@4500
    300R makes 316hp@6250 and 311ftlbs@5000

    https://ww3.arb.ca.gov/msprog/offroa...w-001-0490.pdf
    Last edited by PRE-Z06; 02-26-2019 at 09:45 PM.

  17. #29
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    Quote Originally Posted by JPEROG View Post
    If the 300R case is surfaced high enough, then they are faster then the smaller 3.0 cases. This info. came from a guy that knows and is very involved in testing and setup. I am going to rig my demo boat with a set of stock X motors if possible before the 300R motors get here so we will have a good comparison.

    Joe
    Did you ever get to run this comparison as I'm curious in the results?

  18. #30
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    We are very close to having the 300R motors hung on one. Hopefully within 10 days or so we will be running it. There was no need to rig the X motors for comparison, I have witnessed enough of the 300Rs to know that they are faster and better in every way. To rig it with the X's would have required extra holes etc. and I was not interested in doing that on a brand new rig.

    Joe

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