2015 Prostar - Anyone Grinding the Rudder?

skibugskibug Posts: 1,882 Crazy Baller
We are trying to set up a 2015 Prostar. The rudder does not have an adjustable tab; and for the record that is ridiculous. That decision by Mastercraft is just absurd. How is there any possible downside to having an adjustable rudder? But I digress; has anyone had to grind the opposite side (port side) of the rudder to get some of the torque out of it. Seems as though this would help our situation with how it drives. It seems to be very sluggish to respond to placement from the 1-3-5 side. The response is very asymmetrical. I would expect some; but, not as much as we are experiencing.

Any feedback would be much appreciated.
Bob Grizzi
[Deleted User]
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Comments

  • RichardDoaneRichardDoane Posts: 3,912 Mega Baller
    my 2014 has been perfect w/o any grinding, but if you feel your 2015 needs a little tuning, don't be afraid, just work slowly a little at a time, and test drive after every session
    BallOfSpray Pacific Northwest Vice President of Event Management, aka "Zappy"
  • skibugskibug Posts: 1,882 Crazy Baller
    @richarddoane thanks. I know Mastercraft has touted that they have perfected the rudder and there should be no need to hit it...but, this thing is not driving well at all. We need the boat to list to the port side significantly to get it to track without sliding too much or getting stuck on one side of the course. We have an additional 60 lbs to 70 lbs, above the drivers weight, on the port side; meaning if we have a 200 lb driver we have 270 lbs opposite. It makes it driveable; but a ways off from good.
    Bob Grizzi
    PhilSymo
  • Razorskier1Razorskier1 Posts: 3,412 Mega Baller
    Are you using a 3 or 4 blade? I have found 3 blade generates less rudder load.
    Jim Ross
    Texas6D3dude
  • kurtkurt Posts: 73 Baller
    @skibug in the back lift up the access cover to the rudder and move the steering cable from the outside hole to the inside hole . This will make the steering much more responsive . You just need 2 end wrenches to do it . Also if you only have a ski rack on the drivers side and you stack all your gear as well on that side the weight does add up.
    billy's puddle swerving around the frogs
    MISkier
  • skinonstopskinonstop Posts: 18 Baller
    My 2015 is perfect and hasn't needed any grinding.
    RichardDoane
  • skibugskibug Posts: 1,882 Crazy Baller
    @Razorskier1 4 blade, came with the boat. Is a 3 blade tournament approved; and , is it what will be seen out there at the tournaments?

    @kurt thanks for that heads up on the rudder cable hole, we will definitely try that prior to grinding. We don't keep any gear in the boat so the loading of the driver side is not an issue.
    Bob Grizzi
  • Texas6Texas6 Posts: 2,115 Mega Baller
    My 2015 has some fairly assertive rudder load, but don't view it as a problem, just more than I am accustomed to. The boat definitely prefers to turn right, but my 197 was the same way. I would be curious to hear if the steering cable adjustment relaxes the load somewhat
    Daryn Dean - Lakes of Katy, TX
    ***Robbed out of Hundreds of Panda Worthy Posts***
  • LLUSALLUSA Posts: 206 Solid Baller
    @skibug the ProStar was approved with both 3&4 blade props, 3 blade if you have big time jumpers otherwise 4 blade, we have a 200 foot jumper on our lake and run 7&3 on the boat and it works
    LLUSA, Sr Driver, AWSA Board of Directors, Towboat Committee,Lake Owner
    MattPchris_logan
  • Razorskier1Razorskier1 Posts: 3,412 Mega Baller
    @skibug - 3 blade is approved.
    Jim Ross
  • LeonLLeonL Posts: 1,897 Crazy Baller
    Apparently it's not unusual to find a '14 or '15 with excessive torque load on the steering. Some are OK. I drove a '14 that just wore me out pulling 10-12'skiers. Arm was tired. Some just need that torque relaxed a bit. Weight shifting isn't the answer.
    Leon Leonard Stillwater Lake KY - SR Driver SR Judge
  • Texas6Texas6 Posts: 2,115 Mega Baller
    @LeonL, by "relaxing the torque a bit" do you mean just letting it break in, changing the steering cable from outside hole to inside hole, or are you referring to grinding. I love the way my 15 drives, but I think the rudder load is a bit more excessive than it needs to be
    Daryn Dean - Lakes of Katy, TX
    ***Robbed out of Hundreds of Panda Worthy Posts***
  • skibugskibug Posts: 1,882 Crazy Baller
    @Texas6 @kurt ours does not have a set of holes on the rudder arm, it is a slot. Not quite sure how to adjust it. We loosened the lock nut and tried to slide it but it seems there is something forward of what we can see (under the floor towards the engine) that must be keeping the steering cable secured. Not sure how to adjust it.
    Bob Grizzi
  • RogerRoger Posts: 1,413 Crazy Baller

    It doesn't look like this???
    Roger B. Clark - Okeeheelee skier. Senior driver, Senior Judge
  • skibugskibug Posts: 1,882 Crazy Baller
    @Roger, probably. Those big rubber washers cover up most of the second hole making it look like a slot. Thinking about it, that is pretty stupid on my part....a slot wouldn't work in this type of application. I will have to go look at it again tonight. Thanks.
    Bob Grizzi
  • Chuck_DickeyChuck_Dickey Posts: 1,456 Crazy Baller
    If you zoom in on the picture, you can see the second hole in the tiller arm. You do not new to move the cable mount that's up under the floor.

    The rudder torque is set by the casting and you shouldn't need grind it more especially if you're going to pull shortline skiers. Grinding on the opposite side will reduce the torque and the boat will wallow down the lake. The proper torque greatly helps true tracking in the slalom course.
  • AndreAndre Posts: 683 Crazy Baller
    Wasn't there a fix talked here before ? Like 2 teflon washers or something like that?
  • skibugskibug Posts: 1,882 Crazy Baller
    @Chuck_Dickey, Thanks for the feedback. I was not thinking about grinding the drivers side of the rudder, with the chamfer. I am contemplating grinding the opposite side. I do pull short line skiers everyday (38, 39, and 41 off skiers); but, this seems to be way more torque then I would prefer. I am going to move the the steering cable to the inside hole on the tiller arm and see if that helps.
    Bob Grizzi
  • LeonLLeonL Posts: 1,897 Crazy Baller
    @Texas6, poor wording again on my part. I mean actually doing something. @Chuck_Dickey, your boat may not need grinding, and maybe none "should" but some of them definitely do. As I mentioned earlier, some of them will just wear your arm out. That's more than you need to pull short liners.
    Leon Leonard Stillwater Lake KY - SR Driver SR Judge
  • RichardDoaneRichardDoane Posts: 3,912 Mega Baller
    remember to make sure "prop type" is properly set in the ZO settings, there's options for both 3 blade and 4 blade
    BallOfSpray Pacific Northwest Vice President of Event Management, aka "Zappy"
  • dbutcherdbutcher Posts: 203 Baller
    Drive it for a while as is. You may get used to it. I had a 14 Prostar that I thought had too much torque when I first got it. In less than a month I liked it. I tried the inside hole on the tiller and didn't like that. If memory serves me, the inside hole reduced the steering wheel travel needed to move the rudder, but it required more effort - especially going against the torque.
    Gloersen
  • slowslow Posts: 257 Baller
    For $80000 can't these boat manufactures individually tune you're boat to perfection on their test lake. Is that to much to demand.
    Dacon62Chuck_DickeyBulldogDanEJohn Brooks
  • TFINTFIN Posts: 71 Open or 55K Rated Skier
    The ProStar rudder is actually hand-tuned at the factory and water-tested as you mentioned. Some drivers prefer more pull, however, I have never found the need to additionally grind the rudder on any of my boats.
    Broussard
  • LeonLLeonL Posts: 1,897 Crazy Baller
    Moving the connection to the shorter hole will NOT reduce effort, just increase it.
    Leon Leonard Stillwater Lake KY - SR Driver SR Judge
  • skibugskibug Posts: 1,882 Crazy Baller
    I am not so worried about effort (although it does play into it); I want more exact response in a short distance. Right now, out of 1-3-5, I am having to rotate the wheel way more than I want to and it is very slow to respond.

    I have never driven a boat like this where you had to be so far ahead of the skier to keep in rhythm; and then, if you do get a little out of sync and lose that margin of being ahead, there is little hope of recovering.
    Bob Grizzi
    LoopSki
  • Texas6Texas6 Posts: 2,115 Mega Baller
    I'm definitely not having that problem; bummer
    Daryn Dean - Lakes of Katy, TX
    ***Robbed out of Hundreds of Panda Worthy Posts***
  • skibugskibug Posts: 1,882 Crazy Baller
    @Texas6 @kurt moving the steering cable to the inside hole made a ton of difference. Much more responsive with much less input into the wheel. That seems to have done the trick. Although we still need about a 60 lbs offset of whatever the drivers weight is; meaning the boat has to tip to the port side to get it to track and feel balanced when on plane. Thanks, to everyone who responded, for all the help.
    Bob Grizzi
    kurt
  • Texas6Texas6 Posts: 2,115 Mega Baller
    edited October 2015
    @skibug, fantastic news, thx for the reply. I use a port side ballast in mine which hopefully will help the weight offset. I now have a project for tomorrow! Super helpful, will reply back after I'm done
    Daryn Dean - Lakes of Katy, TX
    ***Robbed out of Hundreds of Panda Worthy Posts***
  • kurtkurt Posts: 73 Baller
    @skibug , Great glad it worked
    billy's puddle swerving around the frogs
  • skibugskibug Posts: 1,882 Crazy Baller
    @kurt @Texas6 another question. Are you guys running with the front cover off? Air dam inserted? etc. Have you experimented with this at all?
    Bob Grizzi
  • kurtkurt Posts: 73 Baller
    @skibug my front cover has only been off once for a family trip. I don't believe I have driven any of the '14 , '15 or '16 prostars in the course with the cover off.
    also I looked at my counter weight and I have 160 lbs I put tight to the gunnel if there is only 2 of us skiing , I take it out when we have 3
    billy's puddle swerving around the frogs
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