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Vibration

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jblmark View Drop Down
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    Posted: April-20-2010 at 5:23pm
I recently replaced the shaft and bushing. I carefully followed the alignment procedures gracefully givin in the forum (Thanks to all). I now have some vibration at low speeds. The vibration lessens as I gain speed. I am concerned about damaging the Transmission if I don't figure out where the vibration is coming from. I have not yet had the prop looked at. I plan on replacing in the next couple of weeks for a 4 blade. I was so concerend that I re-did the alignment procedure again. It seems to be tight with no gaps.

Any suggestions?

Thanks again,

JBLMark76
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TRBenj View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote TRBenj Quote  Post ReplyReply Direct Link To This Post Posted: April-20-2010 at 6:08pm
I take it you didnt have such a vibration before aligning? How bad was it out? Perhaps the previous misalignment was holding the shaft tight to the strut bushing, causing uneven wear- which is now resulting in vibration. Do check the prop, as you mentioned.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 8122pbrainard Quote  Post ReplyReply Direct Link To This Post Posted: April-20-2010 at 6:10pm
Mark,
When you did the alignment, did you turn the shaft to check for a bent shaft forward of the strut? This is where you look for the gap between the coupling halves to follow as the shaft is rotated. Aft of the strut, you need to use a dial indicator on the prop taper.

How's the prop?


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jblmark View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jblmark Quote  Post ReplyReply Direct Link To This Post Posted: April-20-2010 at 6:33pm
I replaced the shaft becasue it was bent. While I had the shaft out I replaced the bushing. The shaft turns freely. I did rotate the shaft as I was cheking the alignment. I have not yet re-done the prop. I assume this may be the culprit.

Thansk,
JBLMArk76
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eric lavine View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote eric lavine Quote  Post ReplyReply Direct Link To This Post Posted: April-20-2010 at 11:46pm
ha, another guy who spells becasue like me, I always have to go back and change that one..
you dropped something on your foot and had knee surgery?? enough said?
"the things you own will start to own you"
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Post Options Post Options   Thanks (0) Thanks(0)   Quote GottaSki Quote  Post ReplyReply Direct Link To This Post Posted: April-21-2010 at 12:05am
Suggesting lapping the prop to the shaft, and mark the shaft with a sharpie marker. Then add the keyway, if the prop doesn't seat where it was, the keyway is binding up.
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79nautique View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 79nautique Quote  Post ReplyReply Direct Link To This Post Posted: April-21-2010 at 1:47pm
Ok you installed a new prop shaft, did you re-use the old coupling or get a new one? if you used the old one did you have the face trued to the new shaft?
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jblmark View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jblmark Quote  Post ReplyReply Direct Link To This Post Posted: April-21-2010 at 1:52pm
Thanks,

I'll give it a whirl
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jblmark View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jblmark Quote  Post ReplyReply Direct Link To This Post Posted: April-21-2010 at 1:53pm
Yes,

Thanks
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79nautique View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote 79nautique Quote  Post ReplyReply Direct Link To This Post Posted: April-21-2010 at 2:07pm
Originally posted by jblmark jblmark wrote:

Yes,

Thanks


? yes to what?
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JBLMark76 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JBLMark76 Quote  Post ReplyReply Direct Link To This Post Posted: April-26-2010 at 6:54pm
Sorry for the miss-posting.

The transmission is bad. Any suggestions regarding rebuilding or replacing. Are they hard to get rebuilt? expensive? Are replacements hard to find?

Thanks,
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Post Options Post Options   Thanks (0) Thanks(0)   Quote C-Bass Quote  Post ReplyReply Direct Link To This Post Posted: April-26-2010 at 7:16pm
Why the new screen name???

Anyway, where are you located, what type of engine, type of transmission? I'm sure Eric will chime in...he's the resident transmission guy. Chances are, whatever is wrong with it, it's repairable.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JBLMark76 Quote  Post ReplyReply Direct Link To This Post Posted: April-26-2010 at 7:19pm
For some reason my profile was not recognized any more. I had to re-up. I'm in Tennessee.

Thanks,
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Post Options Post Options   Thanks (0) Thanks(0)   Quote eric lavine Quote  Post ReplyReply Direct Link To This Post Posted: April-27-2010 at 10:22am
877-369-6693 or my cell 330-322-8817, eric, im in ohio
"the things you own will start to own you"
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