Baller DanE Posted April 1, 2014 Baller Share Posted April 1, 2014 On a 1999 CC Ski Nautique with a 1.23:1 tranny, wich side of the rudder (loooking in direction of travel) is the proper side to grind a bevel in order to create rudder load? (or wich way to turn the adjustable tab). @Jody_Seal ? Link to comment Share on other sites More sharing options...
Chuck_Dickey Posted April 1, 2014 Share Posted April 1, 2014 If you have the adjustable trim tab, looking from the stern towards the bow, move the tab towards the right. If no tab, grind the left side a little at a time and drive the boat to check the results. Remember, if you grind too much off you can't put it back on. Link to comment Share on other sites More sharing options...
Baller_ Jody_Seal Posted April 1, 2014 Baller_ Share Posted April 1, 2014 Looking from the rear grind the port side trailing edge, A nice firm bevel about a 1/4" wide . their is a technique to the grind. I use a 6" grinder and take three long swipes then water test. If you do over grind you can get some neutrality back but dont grind on the opposite side. take a little off the trailing edge. Propellers can effect rudder torque, we see this when changing to three blade or to four and even pitch and diameter change can effect rudder torque. Link to comment Share on other sites More sharing options...
Baller DanE Posted April 3, 2014 Author Baller Share Posted April 3, 2014 @Jody_Seal Does that mean you want the boat to steer left if you let go of the wheel? Link to comment Share on other sites More sharing options...
Baller LeonL Posted April 3, 2014 Baller Share Posted April 3, 2014 I'll answer for Jody on that. Nautique, yes. If you have the tab you don't need to grind. Link to comment Share on other sites More sharing options...
Baller Lieutenant Dan Posted April 3, 2014 Baller Share Posted April 3, 2014 Dumb question perhaps but do you want the boat to steer left if you let go of the wheel of Malibu? Follow up....what side do you grind Malibu rudder? Link to comment Share on other sites More sharing options...
Baller Alberto Soares Posted April 3, 2014 Baller Share Posted April 3, 2014 Help me understand, if the propeller runs clockwise what side should I sand, left or right (looking from the back) Link to comment Share on other sites More sharing options...
Baller LeonL Posted April 3, 2014 Baller Share Posted April 3, 2014 @Lieutenant Dan NO, it's natural pull is to the right, as with MC. Link to comment Share on other sites More sharing options...
Baller BobF Posted April 3, 2014 Baller Share Posted April 3, 2014 MC and Malibu have LH rotation props, and the starboard trailing edge (right when looking at the back) should be ground. Nautique is RH rotation and the port trailing edge should be ground. MC and 'bu will pull the wheel to the right and Nautique will pull to the left when underway. (editted to correct the lh vs rh prop info) Link to comment Share on other sites More sharing options...
Baller Alberto Soares Posted April 3, 2014 Baller Share Posted April 3, 2014 Thank you @Bf !!! Link to comment Share on other sites More sharing options...
Baller_ Jody_Seal Posted April 3, 2014 Baller_ Share Posted April 3, 2014 OK!!! you guy's need to go back to School!!! Ski Nautiques turn a "Right" Rotation Propeller! Natural direction is the boat to pull to the left! Just look at your propeller Identification it will read something like 12.5X15.5 1" RR (Right Rotation!) All Other's have "Left" Rotation Propellers(Mal,Mas, Centurion,ect)! Natural Direction for boat to pull is to the right!!! look at your propeller identification it will read something like 13X13 1.25" L (Left Rotation!) When grinding rudders always grind to enhance the natural direction of the the propeller rotation. Trying to make a Nautique pull like a left rotating boat only makes the boat perform poorly as far as steering stability is concerned. Hope this clarify's things! Link to comment Share on other sites More sharing options...
Baller DanE Posted April 3, 2014 Author Baller Share Posted April 3, 2014 @Jody_Seal Thanks! Link to comment Share on other sites More sharing options...
skibumm Posted April 3, 2014 Share Posted April 3, 2014 Thanks Jody. I thought I was going nuts as mine is Centurion with LH rotation and was just going to go check mine to make sure that I was not imagining that. I have not done anything to my rudder and I had always thought that you needed that force or natural tendancy of the boat to turn when you let go of the wheel for it to track better. Is that not the case do I want a more neutral feel on the wheel? Just looking to understand why I would grind my rudder even though I have heard it for years I have never understood it so I left well enough alone. Link to comment Share on other sites More sharing options...
Baller BobF Posted April 3, 2014 Baller Share Posted April 3, 2014 Oops, it appears that I got my lh and rh's backwards in the above post. Thanks for clearing that up, @Jody_Seal! Will edit the post to have correct info, if possible. Link to comment Share on other sites More sharing options...
Baller DanE Posted April 3, 2014 Author Baller Share Posted April 3, 2014 @skibumm No, if you drive in the course you do not want a neutral steering so you're problably good to go! Link to comment Share on other sites More sharing options...
Baller rockdog Posted April 3, 2014 Baller Share Posted April 3, 2014 @Jody_Seal see pics attached of my rudder, 97 SN. This is wrong side isn't it? Sorry I'm easily confused. Has it been grinded or is this factory spec? Sorry if my photo's are massive, first time I've done it. @mattp what is the optimum pixel size for photo's to be? Link to comment Share on other sites More sharing options...
Baller_ Jody_Seal Posted April 3, 2014 Baller_ Share Posted April 3, 2014 @rockdog. Want me to order you up a new rudder? Link to comment Share on other sites More sharing options...
Baller rockdog Posted April 3, 2014 Baller Share Posted April 3, 2014 So somebody has ground down the wrong side? Link to comment Share on other sites More sharing options...
Baller_ Jody_Seal Posted April 4, 2014 Baller_ Share Posted April 4, 2014 Pretty much Really ground the wrong side! Link to comment Share on other sites More sharing options...
Baller rockdog Posted April 4, 2014 Baller Share Posted April 4, 2014 Any chance I could do the other side just at least to even it up? I realize it will take a little off the overall length, but spending $600 on a new one doesn't appeal at the moment. Will it affect performance significantly? Link to comment Share on other sites More sharing options...
Baller_ Jody_Seal Posted April 4, 2014 Baller_ Share Posted April 4, 2014 brass scrap metal is up! I have a used 11-A un ground rudder in my used parts inventory. $125 plus shipping........To Australia! Link to comment Share on other sites More sharing options...
Baller ForrestGump Posted April 4, 2014 Baller Share Posted April 4, 2014 Wow! Someone screwed THAT rudder up. Link to comment Share on other sites More sharing options...
east tx skier Posted April 4, 2014 Share Posted April 4, 2014 Here is the factory grind on my old MC 205. You can barely see it. A little goes a long way. The wheel would spin at over 20 mph. Great feel holding it straight at speed. The arrow shows the area where the grind is most obvious, but it runs the length of the starboard trailing edge (remember, it's a MC. So it's set up for a right hand pull at the wheel). http://mastercraft.com/teamtalk/attachment.php?attachmentid=2804&stc=1&d=1129056132 Link to comment Share on other sites More sharing options...
Baller rockdog Posted April 4, 2014 Baller Share Posted April 4, 2014 Thanks @east_tex_skier, that's a helpful pic. @Jody_Seal I have messaged you to help me get out of this mess! Link to comment Share on other sites More sharing options...
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