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Old Yesterday, 12:17 AM
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Bubbacuse77 Bubbacuse77 is offline
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Boat: Mastercraft Prostar 197, 2002
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197 Rudder change

I've seen a couple posts about guys swapping out the early model 197 rudders for the 2006 and newer ones but I couldn't find one specifically on my year with the winged rudder so I help this helps someone else in the same "boat".

I wanted to know the following when searching and couldn't find it so I hope this helps someone else:

1: would the current rudder port work with the new rudder? I couldn't get any MC dealer to give me a confident answer and most told me that I did need a new port. "Props" to Eric at OJ who I happened to ask after finding out that OJ made the ports for my year boat and the new rudders in 2006. He said it should work no problem since both rudders had a 1-1/8" shaft. Saved me $250 and the time of changing the port. My current port has the orings for seals and after reading a couple rudder stories seems like one of the better designs.

2: Will the boat porpoise at speed without the wing since my hull is not hooked? Yep it does a bit above 38MPH. but I think I will add a fixed wake plate with a slight down angle to smooth things out for higher speeds when skiing and footing as well as stop the porpoise. Hoping the plate also helps create a bit of a bump at wake board speeds If I sack the rear for boarding.

3. Will it give me more power? My dealer told me that the wing is robbing about 20% of my power and he was right. My speed increased 2.5 MPH and now I am pushing 46MPH on the GPS. I also have dropped about 300RPM at my skiing speed of 36MPH, leaving me a bunch of throttle left in reserve. Power at slow speeds and in turns increased a bunch with the prop not pushing on that wing.

4. Will it improve the handling? Yep without a doubt, the steering is effortless now and where you really notice it is at speed and slow turns under power. The boat is actually more maneuverable as well.


The only diffrence in the two rudders fit in the port is that the hole for the cotter pin is about 1/8" higher on the new one, not really a concern since the cotter pin is just there to keep the rudder from falling out the bottom in the unlikely event the arm comes loose.
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Last edited by Bubbacuse77; Yesterday at 12:28 AM.
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Old Yesterday, 12:18 AM
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The old
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Old Yesterday, 12:21 AM
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The old rudder in port. I took the pic after I pulled the cotter pin.
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Old Yesterday, 12:23 AM
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Bubbacuse77 Bubbacuse77 is offline
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Used a floor jack to spot me taking out the old rudder and holding the new one up in place.
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Old Yesterday, 12:24 AM
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New rudder in place, total time, 10 min for the swap.
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Old Yesterday, 12:26 AM
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New rudder in port, not much diffrent to see here.
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Old Yesterday, 01:12 AM
MC197indy MC197indy is offline
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Hey Bubbacuse,

Just curious, on your old rudder, is the wing standard on the 2002 or a option. Mine looks just like your old one, but no wing.
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Old Yesterday, 03:03 AM
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In 2002 the non TT 197s didn't have a hook in the hull and a wing on the rudder instead. In 2003 the hook was standard on all 197s. If you feel the trailing edge of your hull you wil notice the slight curve. The wing on mine was in place of that to keep the nose down at speed.
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Old Yesterday, 06:34 AM
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How hard was it to get the old rudder port out? Was it glued in with 5500?
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  #10  
Old Yesterday, 07:19 AM
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He didn't change the port from what I read.
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Prior boats - 2009 X14, 2008 X14, 2005 197, 1988 Tristar 190, 1989 Prostar.
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