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Please help with fin |
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dans 
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Joined: March-23-2006 Location: United States Status: Offline Points: 187 |
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 Topic: Please help with finPosted: March-26-2006 at 8:01pm |
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My middle fin on my 1982 sn 2001 is bent about 4 inches out of line. Does anyone have any tips on how to fix it. Thanks , Dan
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Morfoot
Grand Poobah 
Joined: February-06-2004 Location: South Lanier Status: Offline Points: 5323 |
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Posted: March-27-2006 at 5:59am |
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Dan, I straightened mine out (after I dropped the boat on the ramp) by using a "hydro-press" (bearing press should work). I just laid the fin down on its side, lined up the press in the middle of the fin then let her rip. I had to do this several times to be sure I got her as straight as I could. It lines up with the other 2 fins with 1/4" or so. I can live with that.
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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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David F
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Joined: June-11-2004 Location: United States Status: Offline Points: 1770 |
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Posted: March-27-2006 at 7:49am |
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The fin should be fastened from the bottom with phillips head sheet metal screws. Remove the screws and pull (stuck with sealant) the fin off. Take or ship the fin to a prop shop and they can either straighten it or tell you that it cracked during the attempt.
Or simply purchase a new one from about $75 from your local dealer. Fin part number 36718 fits boats 70-97. |
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jos1
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Joined: January-07-2006 Location: Netherlands Status: Offline Points: 21 |
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Posted: March-28-2006 at 11:11pm |
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Fin straightning.
You can send it to a prop shop. You can try it yourself, be carefull. Do not heat it, severe cracks below the forging temp, saw some ruined ones due to low temp. Did mine cold worked, large nylon hamer or hammer with aluminum heads, use hardwood underlay or solid aluminium of nylon underlay. Do not use steel tools this will mark the fin, the bronze is very soft,when you can regrind it. Press can be used but a fin is diffecult to handle because of the radis through taper of the fine. Did mine which where quit soft. Succes. |
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jos
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The Lake
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Joined: May-13-2005 Location: Lk Winnebago MO Status: Offline Points: 1157 |
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Posted: March-29-2006 at 6:50am |
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Hey Dans,
I took a bent fin of mine to a "Prop Doc" here in the Kansas City area, he straightened it for $20.00, plus polished it all up. |
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David F
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Joined: June-11-2004 Location: United States Status: Offline Points: 1770 |
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Posted: March-29-2006 at 7:16am |
Always the paranoid one... I believe the fins are Nibral (Nickle, Bronze, Aluminum alloy) like many of the props. If this is the case, then the dust caused by grinding is toxic...use a respirator. If they are Bronze, then I do not believe there is a health risk in grinding. |
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jos1 wrote: