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Old 10-24-2020, 09:41 AM   #1
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Need rudder help while boat is on the hard.

I'm on the hard for only a couple more days. I have the rudder off the boat. I noticed there is a hollow cavity in the rudder with 4 threaded "plugs." See pic.
Three of the four have plugs while one, top side, does not. While sanding the rudder water was coming out of hole. Of course. Why would they leave one open? Freezing Temps while on the hard? I'm in Florida so should I drain and cap it?
It's an articulated rudder and I'm trying to track down the manufacturer but I thought someone here might have an idea.
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Old 10-24-2020, 10:22 AM   #2
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It looks like a welded piece. It is possible they put they left holes for expansion during welding, then plugged them.
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Old 10-24-2020, 11:10 AM   #3
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Mine are full of anti-freeze. Do not know why. Came from the factory that way. I changed it 2 years ago
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Old 10-24-2020, 01:21 PM   #4
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Are the holes treaded?

Vascer, makes sense. The added weight of the antifreeze might give greater mass and a greater bite of the water? No rudder 'chatter'.
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Old 10-24-2020, 02:30 PM   #5
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Mine have a 1/2" pipe plug in the top and bottom. You fill from the bottom like a lower unit. Mine hold about 2 gallons each
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Old 10-24-2020, 03:24 PM   #6
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Quote:
Originally Posted by vacser View Post
Mine have a 1/2" pipe plug in the top and bottom. You fill from the bottom like a lower unit. Mine hold about 2 gallons each
I think your observation just answered his question.
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Old 10-24-2020, 07:10 PM   #7
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Quote:
Originally Posted by OldDan1943 View Post
Are the holes treaded?

Vascer, makes sense. The added weight of the antifreeze might give greater mass and a greater bite of the water? No rudder 'chatter'.
Yes. The holes are threaded. I'm guessing one plug just got lost. We live in Florida and full time on the boat. No chance of freezing. I'll like for a treaded "plug" but if I can't get one by Tue the boats going back in the water. Leave it open i guess?
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