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| broke prop shaft https://www.mudmotortalk.com/mmt_v2/viewtopic.php?f=41&t=30310 |
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| Author: | sulpher_river_runner [ Wed Jun 27, 2012 6:58 am ] |
| Post subject: | broke prop shaft |
i have a 13hp lt only put about 6 hrs of deep water on it, and the 3/4 inch shaft snaped off were the threads started. is this common or just a bad shaft? shaft was done by a machine shop and made from 3/4 cold rolled, now having a shaft made from 4140 hardened steel. |
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| Author: | Kja0792 [ Thu Jun 28, 2012 6:55 am ] |
| Post subject: | Re: broke prop shaft |
Ive got a 7/8 cold roll shaft on my mb 35 put 30 hours on it in the mud mostly with no problems yet were all the bearings changed with the shaft? Maybe a bearing seized |
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| Author: | Buzz Killington [ Thu Jun 28, 2012 6:56 am ] |
| Post subject: | Re: broke prop shaft |
viewtopic.php?f=6&t=27445&p=316454&hilit=oops%21#p316454 It happens. |
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| Author: | sulpher_river_runner [ Thu Jun 28, 2012 5:24 pm ] |
| Post subject: | Re: broke prop shaft |
all the bearings were free, but went ahead and replaced everything that moves from the back of the motor to the lock nut on the bottom of the shaft. had a lil virbration before, but has nun now dont know if it is the new prop or what, |
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| Author: | Puddle jumper [ Thu Jun 28, 2012 6:34 pm ] |
| Post subject: | Re: broke prop shaft |
If it broke right behind the prop shaft housing the threads were machined too deep, your 3/4'' shaft may have been 1/2-7/16'' in the thread valley. Where did it break? |
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