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SN tiller arm |
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FrankT 
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Joined: September-07-2006 Status: Offline Points: 245 |
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 Topic: SN tiller armPosted: May-17-2011 at 12:04am |
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Removed the tiller arm off of the 71SN to make a shorter one. The curret is 8 inches to centerlines. Most of the newer boats are in the 6 inch range. Any recommendations?
Frank |
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8122pbrainard
Grand Poobah 
Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: May-17-2011 at 8:58am |
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Frank,
What do you want to do by shortening the arm? Are you changing the complete system (helm and cable)? Keep in mind the shorter arm will increase the push, pull and torque loading on that old 71 system! Personally, with saftey in mind, the steering system is one item I really wouldn't mess with. |
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FrankT
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Joined: September-07-2006 Status: Offline Points: 245 |
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Posted: May-17-2011 at 9:46am |
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Slow speed maneuverability is horrible on the SN. A pontoon can turn tighter. Helm is currently a morse.
Frank |
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SNobsessed
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Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
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Posted: May-17-2011 at 10:54am |
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Frank - Poor control in tight quarters is an inherent trait of a single screw inboard. The best way to handle this is to bump the throttle to get some thrust pushing past the rudder so it reacts quicker.
Possible your boat has a short throw cable (universal). That would definitely inhibit good steering at idle. |
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“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
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FrankT
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Joined: September-07-2006 Status: Offline Points: 245 |
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Posted: May-17-2011 at 12:01pm |
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My frustration with it is docking, turning to pick up skiers, and turning the boat around at the end of the cove.
I do not know what the length is on a modern SN but the ski supreme is about 5-1/2" and the supra is in the 6" range. I haven't measured the malibu but the maximum rudder angle is much greater. Does anyone know what a current SN is? Roughly 1 inch shorter yeilds 8% increase in rudder angle and 2 inches 18%. The increased load the steering system sees is 14% and 33% respectfully. What the steering system designed for I do not know but mine would appear to be the same as one would find in a current boat. FrankT |
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TRBenj
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Joined: June-29-2005 Location: NWCT Status: Offline Points: 21186 |
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Posted: May-17-2011 at 12:12pm |
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Frank, newer Nautiques (R&P) use shorter tiller arms than the older (Rotary) ones. Going to one of these would be the quickest way to improve low speed maneuverability. I agree that the pre-2001 boats with the standard (short throw) cable are immediately noticeable as having a larger turning radius. We went to a 2001 cable (10.5" vs. 8.5" of thros) on our BFN, but that's an expensive cable that also required a clamp tube swap. If youre ok with increasing the steering effort somewhat, Id look into that shorter CC tiller arm. At a glance, I would think the other hardware used to connect to it would swap over.
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