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bent tracking fin source of noise? |
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8122pbrainard 
Grand Poobah 
Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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 Topic: bent tracking fin source of noise?Posted: November-23-2013 at 9:03pm |
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They must use the silicone at Tim's work on the airframes! 
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Gary S
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Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096 |
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Posted: November-22-2013 at 8:47pm |
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You sure have to wonder about those guy's that use stuff available at work. Better check his battery,it might be out of a Miata  The only guy that could do that might get away with that would be Zach |
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phatsat67
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Joined: March-13-2006 Location: Indiana Status: Offline Points: 6157 |
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Posted: November-22-2013 at 6:34pm |
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Seems like that would make it faster Joe  ..Our buddy has a story about a master craft poking a few fins up through the hull. The DNR wouldn't let them pull it out on the park lift as it was sinking so they beached it and somehow lifted it up and taped up the hull with a ton of tape. Ran it back a few miles on the lake with no leaks at about 15 mph! |
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JoeinNY
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Joined: October-19-2005 Location: United States Status: Offline Points: 5698 |
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Posted: November-22-2013 at 6:25pm |
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For a short test run I would acetone the hull and put down a well smoothed out piece of aluminum tape.. just dont run it that way more than a few years..
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phatsat67
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Joined: March-13-2006 Location: Indiana Status: Offline Points: 6157 |
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Posted: November-22-2013 at 6:15pm |
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What HW said. 4200 if you want to take it off. My boat only has one straight fin. No noise anywhere but I could see it making some noise if the turbulence was just right by the time it was hitting the rear fin?
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13514 |
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Posted: November-22-2013 at 5:35pm |
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I wasn't going to mention it but it did seem like Miss Scarlett put on a few pounds...
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Morfoot
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Joined: February-06-2004 Location: South Lanier Status: Offline Points: 5320 |
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Posted: November-22-2013 at 5:29pm |
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 I know, I know! I was in a hurry to get it back on and get back on the water plus it was cheap... I'll pick up some 4200 later....Well, its been 8-9 years? |
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"Morfoot; He can ski. He can wakeboard.He can cook chicken.He can create his own self-named beverage, & can also apparently fly. A man of many talents."72 Mustang "Kermit",88 SN Miss Scarlett, 99 SN "Sherman"
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13514 |
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Posted: November-22-2013 at 5:15pm |
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Tim! Silicone below the waterline?
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13514 |
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Posted: November-22-2013 at 5:13pm |
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4200 is just as good for sealing purposes and has less adhesion. You dry store your boat.... I wouldn't 5200 anything that might need to come back off.
I don't remember if you foamed or not. This would determine how prudent sealing up those mounting holes would be if you did try to test run without that fin in place. |
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Morfoot
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Joined: February-06-2004 Location: South Lanier Status: Offline Points: 5320 |
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Posted: November-22-2013 at 5:12pm |
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If it's never been removed in 20 years I bet it won't take much to remove it from the hull. When I had my mishap on the ramp a many years ago I bent one at about 30 degrees... It came off pretty easy and I was able to straighten it out with a hydropress here at work. I know I didn't use 5200 to reinstall it but used some silicon here in the shop that had 'expired' and it's held up great. Didn't get crazy with it cause if I ever have to remove it again I don't wanna have to use a jackhammer.
Just reused the same hardware that came out. You should be able to do the same.
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"Morfoot; He can ski. He can wakeboard.He can cook chicken.He can create his own self-named beverage, & can also apparently fly. A man of many talents."72 Mustang "Kermit",88 SN Miss Scarlett, 99 SN "Sherman"
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kapla
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Joined: March-27-2008 Location: BA, Argentina Status: Offline Points: 6148 |
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Posted: November-22-2013 at 4:56pm |
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they are screwed to the hull and glued with some sealant, so once screws are removed I need to cut the sealant from base and work my way out to move it!
sounds simple but I guess that MF is kinda part of the hull after 20 year... To put it back tons of 5200 and screws..Correct? |
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<a href="">1992 ski nautique
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Hollywood
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Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13514 |
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Posted: November-22-2013 at 4:17pm |
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Others have said a bent fin can make that noise. You could remove it, put the screws back in, and go for a ride to check. I would not attempt any straightening whatsoever with it attached to the boat...
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kapla
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Joined: March-27-2008 Location: BA, Argentina Status: Offline Points: 6148 |
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Posted: November-22-2013 at 4:08pm |
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Ever since I did the overhaul of the boat 4 years ago Ive been dealing with a grouling sound in the 2200-2800 rpm range, it was problable it was there prior but never noticed it or didnt pay attentio to it by then. At first I though missalligmnet, took care of that, also replaced cutlass bearing, gearbox etc. Sound still remains. Its not from the engine or driveline for sure. And its noticeable on the pylon area....
The only thing I can think is causing this is the middle fin that is bent to one side as you can see in this picture.  I would like to try and fix this, how can I get that one to alling with the others? I need to move it and work it out on the bench or I can somehow heat it and work it in place? 
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<a href="">1992 ski nautique
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Morfoot wrote: