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Jan 23rd, 2013
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Bent prop shaft #12390967
08/18/17 03:28 PM
08/18/17 03:28 PM
Joined: Sep 2003
Posts: 376
Waco Tx.
J
Jigman Offline OP
Angler
Jigman  Offline OP
Angler
J

Joined: Sep 2003
Posts: 376
Waco Tx.
Was washing my boat yesterday and noticed my prop was spinning out of line,can it be straightened.


Good Fishing.
Re: Bent prop shaft [Re: Jigman] #12392019
08/19/17 02:45 AM
08/19/17 02:45 AM
Joined: Jun 2004
Posts: 1,479
Benbrook Tex
O
OPTI Offline
Extreme Angler
OPTI  Offline
Extreme Angler
O

Joined: Jun 2004
Posts: 1,479
Benbrook Tex
They can be has to be removed from case but I have never had one done they say it weakens the metal and will bend easier the next time or even break so I just recommend replacing it cause when I do it I have to warranty it...OPTI

Re: Bent prop shaft [Re: Jigman] #12394485
08/21/17 01:56 PM
08/21/17 01:56 PM
Joined: Jun 2014
Posts: 333
Eagle Mountain Lake
B
BODA Offline
Angler
BODA  Offline
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B

Joined: Jun 2014
Posts: 333
Eagle Mountain Lake
https://www.youtube.com/watch?v=0G3-dTiYanw

if you noticed it before you screwed anything up you might be ok

Re: Bent prop shaft [Re: Jigman] #12394778
08/21/17 05:00 PM
08/21/17 05:00 PM
Joined: Aug 2016
Posts: 937
Melissa, Tx
T-racer Online content
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T-racer  Online Content
Pro Angler

Joined: Aug 2016
Posts: 937
Melissa, Tx
Ronnie Fretwell at Xtreme Marine is able to do it. Of course if you can just get a new gear case under warranty or something like that then do it, but sometimes for those of us with no warranty that's not in the cards for the cost of a new gear case. If it isn't bent too bad, it shouldn't be something that just bends super easily again once it is fixed.

Last edited by T-racer; 08/21/17 05:01 PM.

Bullet 20XRD Comp - Merc 300XS
Mallard Marine Nacogdoches, Tx
972-837-9404
Re: Bent prop shaft [Re: Jigman] #12395001
08/21/17 07:16 PM
08/21/17 07:16 PM
Joined: Oct 2016
Posts: 513
South Texas
B
Bulletman99 Offline
Pro Angler
Bulletman99  Offline
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Joined: Oct 2016
Posts: 513
South Texas
First--If you have insurance and your policy covers "Under-Water Obstruction" turn in a claim. LU work is pretty expensive.

Second--I saw the video listed above a few years ago and caused quiet a stir on BBC. Having a mechanical background I can say with certainty I would never try that route. Bending a 1 inch solid hardened steel shaft housed inside bearings, an aluminum bearing carrier inside an aluminum housing is just asking for trouble!

Third---"DON'T" run it again until it's fixed. The wobble and load from the prop "WILL" cause additional problems.


Bullet 20XD
JSRE Modified Merc Promax
Re: Bent prop shaft [Re: Jigman] #12395116
08/21/17 08:33 PM
08/21/17 08:33 PM
Joined: Jan 2003
Posts: 254
T
TSpencer Offline
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TSpencer  Offline
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T

Joined: Jan 2003
Posts: 254
$170 at Nettles Props in Austin. They straighten on the engine without removing.


Had the same shaft straightened 3 times on my 2001 Yamaha 225 ox66. Fourth time I bent it so bad the boat would hardly plain. I decided to have it replaced this time. One of the best mechanics in the Austin area did the replacement. He said the bearings and carriers looked great. Just needed the shaft. That was 2 years ago...and still going strong with the original 2001 bearings and races.

BTW, Nettles has been doing this for years now. They've done hundreds from what I hear.



Last edited by TSpencer; 08/21/17 09:22 PM.
Re: Bent prop shaft [Re: Jigman] #12395689
08/22/17 02:49 AM
08/22/17 02:49 AM
Joined: Nov 2002
Posts: 3,770
Yantis, TX
Gamblinman Offline
TFF Team Angler
Gamblinman  Offline
TFF Team Angler

Joined: Nov 2002
Posts: 3,770
Yantis, TX
Originally Posted By: Jigman
Was washing my boat yesterday and noticed my prop was spinning out of line,can it be straightened.


First, make sure it is your propshaft that is causing the issue. Pull the prop and lay something close to the shaft and spin it to check propshaft run out. Props can get installed incorrectly or bent.

Re: Bent prop shaft [Re: Jigman] #12400195
08/25/17 02:21 AM
08/25/17 02:21 AM
Joined: Aug 2016
Posts: 937
Melissa, Tx
T-racer Online content
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T-racer  Online Content
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Posts: 937
Melissa, Tx
Yeah checked on this for you and heard it straight from the horses mouth that they can be re straightened by the right guy, and that it is absolutely worth it. I couldn't explain it like he could but something about the degree of bend is so insignificant compared to the degree of bend needed to truly weaken the shaft.


Bullet 20XRD Comp - Merc 300XS
Mallard Marine Nacogdoches, Tx
972-837-9404
Re: Bent prop shaft [Re: Jigman] #12401047
08/25/17 06:45 PM
08/25/17 06:45 PM
Joined: Sep 2003
Posts: 376
Waco Tx.
J
Jigman Offline OP
Angler
Jigman  Offline OP
Angler
J

Joined: Sep 2003
Posts: 376
Waco Tx.
Thanks for input, took it to Anglers Marine in seven points yesterday and Terry worked me in, called me 2 hours after drop off and ready.Have not ran it yet but it looks good,he said he got it to 4 thousands. nice guy


Good Fishing.
Re: Bent prop shaft [Re: Jigman] #12402059
08/26/17 02:44 PM
08/26/17 02:44 PM
Joined: May 2003
Posts: 11,510
Littlefield Tx & Lake A. H. US...
gary purdy Offline
TFF Guru
gary purdy  Offline
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Joined: May 2003
Posts: 11,510
Littlefield Tx & Lake A. H. US...


The world will not be destroyed by those who do evil, but by those who watch them without doing anything. Remember what He has done and remember that He is not done yet!-- GOD IS GOOD
Re: Bent prop shaft [Re: Jigman] #12411632
09/02/17 10:00 PM
09/02/17 10:00 PM
Joined: Mar 2010
Posts: 218
Grand Prairie/Weatherford
W
way2slow on h2o Offline
Outdoorsman
way2slow on h2o  Offline
Outdoorsman
W

Joined: Mar 2010
Posts: 218
Grand Prairie/Weatherford
Bent Propshaft Straightening:

This is an ongoing debate, and I can assure you, it can be done.
I've been racing boats since '82 and have bent more shafts than I can count. Being neighbors with a Metallurgist at Lockheed and having access to both a Brinell and Rockwell hardness testers, I was able to determine this about prop shafts:

A: the shaft is not hardened (if so, how does a rubber seal wear a groove in the shaft?)
B: the small amount the shaft bends does not change the molecular structure around the affected area.
C: straightening does not "weaken" the metal

We've straightened literally hundreds of shafts to 0.000-0.002" (factory spec is 0.003") without ramifications.
I can spin my race prop 5730 rpm (10,200 rpm on motor) so on a stock fishing gear case @ 6000 rpm the Propshaft is spinning a mere 3200 r's....

Re: Bent prop shaft [Re: Jigman] #12419204
09/08/17 05:22 PM
09/08/17 05:22 PM
Joined: Jun 2008
Posts: 2,871
The Great State of Texas
H
Hog Jaw Online content
Extreme Angler
Hog Jaw  Online Content
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H

Joined: Jun 2008
Posts: 2,871
The Great State of Texas
Not know smarty but when you hammer down on the throttle a little torque is made which may "bend " the shaft ???

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