Boats For Sale:
Vibration while turning |
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1994nautique 
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Joined: March-21-2012 Location: Wyoming Status: Offline Points: 29 |
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 Topic: Vibration while turningPosted: March-21-2012 at 3:10am |
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Last summer I had some vibration while turning either direction with the boat. The vibration got worse the tighter i turned. Didnt get any worse over the summer. Is this an alignment problem? Any ideas?
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skitique179
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Joined: December-06-2011 Status: Offline Points: 176 |
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Posted: March-21-2012 at 3:34am |
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Had this problem along with vibration at high rpm. Both were rectified with a new strut bearing and alignment...
Not sure which did the trick but the combination fixed my problem |
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: March-21-2012 at 10:05am |
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Kent,
You may or may not have a problem. Whenever you put a any boat into a turn, prop/rudder cavitation is always there. However, as mentioed, do check your alignment and the cutlass bearing to shaft clearance. |
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SNobsessed
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Joined: October-21-2007 Location: IA Status: Offline Points: 7102 |
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Posted: March-21-2012 at 10:43am |
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Kent - Welcome to the site & the 'Primary Ladder Group'!
You should perform an alignment before replacing any parts. Pete has a how-to video somewhere on this site. Be on the lookout for a bowed shaft, that would amplify the problem. Let us know what you find out. |
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“Beer is proof that God loves us and wants us to be happy.”
Ben Franklin |
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xiaomaizi85
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Joined: March-22-2012 Location: -- Select Count Status: Offline Points: 3 |
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Posted: March-22-2012 at 12:52am |
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I have been looking for this topic for a long time, thank you so much.
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Bri892001
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Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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Posted: March-22-2012 at 1:03am |
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I guess Supra has given up on boats and is now selling shoes
 I believe I've seen TRBenj and others say that certain props will bring out a turning vibration as well. |
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1994nautique
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Joined: March-21-2012 Location: Wyoming Status: Offline Points: 29 |
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Posted: March-22-2012 at 2:50am |
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Thank you everyone, gotta say I don't know much about the direct drives so it's going to be a learning process for me. I've only owned the boat for a little over a year..... I have two props I don't know which one is the factory prop one is bronz and the one on the boat is silver not sure how to decifer the numbers. I will defanitely look for the how to video on the alignment! Thanks again everyone! Still got some ice on the lake but I'm ready to get the boat out!
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OverMyHead
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Joined: March-14-2008 Location: MN Status: Offline Points: 4861 |
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Posted: March-22-2012 at 3:22am |
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The bronze is more likely the factory prop. A "silver" Prop sounds like stainless steel, they are high performance but not very forgiving, If you hit something hard it will not sacrifice itself like bronze or nibral, making the far more expensive transmission the recipient of the impact. It would be interesting to swap them and see if the problem is still there. That would require a puller, and "lapping" the other prop to the shaft. Do a search for Pete's video on that.
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For thousands of years men have felt the irresistible urge to go to sea, and many of them died. Things got better after they invented boats.
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1994nautique
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Joined: March-21-2012 Location: Wyoming Status: Offline Points: 29 |
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Posted: March-22-2012 at 4:44am |
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Sounds good I will try that.... Do you think there is any difference in the pitch? It doesn't look like it to me. Thanks
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8122pbrainard
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Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045 |
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Posted: March-22-2012 at 8:40am |
You need to look at the numbers on the props. By eye it's tough to tell. Really the only way to tell is to have a prop shop check the props with their pitch blocks. |
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Bri892001
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Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
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Posted: March-22-2012 at 1:04pm |
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The numbers are often around the hubs of the prop. So it can be a little tough while it's installed. Here's a good picture from the Acme site:
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Keith
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Owner / Operator of CorrectCraftFan.com Joined: October-20-2003 Location: Pepperell, MA Status: Offline Points: 1917 |
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Posted: March-22-2012 at 1:51pm |
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I had this problem in the past and the prop was the issue. Replacing the prop (thanks Tim) cleared up the vibration - and greatly increased performance as well!
-Keith |
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Rev Bob
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Joined: March-11-2012 Location: Left Coast Status: Offline Points: 45 |
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Posted: March-22-2012 at 2:03pm |
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As Dave mentioned, make sure the prop is lapped to the shaft, and not riding on the key. A worn/loose cutlass bushing will give a fair bit of cavitation sometimes.
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Cheers,
Rev Bob "if it's gonna happen, it'll happen out there!" ~~~ My Dad always said; "Everything on your boat is either broken or about to be....and you just don't know about it yet". **** |
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1994nautique wrote: