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Whirring noise when turning at higher speed

Printed From: CorrectCraftFan.com
Category: General Correct Craft Discussion
Forum Name: Common Questions
Forum Discription: Visit here first for common questions regarding your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=27268
Printed Date: November-24-2024 at 10:51pm


Topic: Whirring noise when turning at higher speed
Posted By: Patman79
Subject: Whirring noise when turning at higher speed
Date Posted: August-01-2012 at 5:24pm
I took the boat out this last weekend and it ran like a champ but had a whirring sound when turning at speeds above 35 or so. What could be causing this? It also made a strange noise when reversing. So closse to perfect other than that...

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Patrick



Replies:
Posted By: Bri892001
Date Posted: August-01-2012 at 6:47pm
Whirring noise when reversing is common and normal. As long as it's a whirring and not a grinding or something.

The whirring at speed when turning... I know different propellers can effect this but I don't know all the details on that.


Posted By: C-Bass
Date Posted: August-01-2012 at 7:04pm
Yep...sounds like a good Correct Craft to me. Our 85 does this more so when turning left, and more with the original prop. It still does it with the Acme, but doesn't seem to be as noticable.

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Craig
67 SN
73 SN
http://www.correctcraftfan.com/diaries/details.asp?ID=6103" rel="nofollow - 99 Sport
85SN


Posted By: 8122pbrainard
Date Posted: August-01-2012 at 9:11pm
Originally posted by Patman79 Patman79 wrote:

I took the boat out this last weekend and it ran like a champ but had a whirring sound when turning at speeds above 35 or so. What could be causing this? It also made a strange noise when reversing. So closse to perfect other than that...

Think about two things. A prop/hull cavitation while turning and the planetary gear set for reverse in the trans. If you ever get a chance, take a look at one of the trans manuals in the reference section. You will hopefully see how reversing the output shaft is done with the planetary gear set.

Is this your first inboard?

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/diaries/details.asp?ID=1622" rel="nofollow -

54 Atom

/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique

64 X55 Dunphy

Keep it original, Pete
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Posted By: Patman79
Date Posted: August-01-2012 at 10:42pm
No sir, just the first to make the noise.

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Patrick


Posted By: 8122pbrainard
Date Posted: August-01-2012 at 10:51pm
Originally posted by Patman79 Patman79 wrote:

No sir, just the first to make the noise.

Patrick,
Fill me in on some more details. "first to make the noise" from when? Is the noise new? how long have you run the boat? When was the last time the damper was changed out?

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/diaries/details.asp?ID=1622" rel="nofollow -

54 Atom

/diaries/details.asp?ID=2179" rel="nofollow - 77 Tique

64 X55 Dunphy

Keep it original, Pete
<


Posted By: Patman79
Date Posted: August-02-2012 at 12:29pm
Sorry Pete. I've only had the boat a month and a half or so and this weekend was the very first time I've had it on the water. I was waiting to put a new carb on before that. This is the first time I have been in an older Correct Craft since I was a about 8 or nine when I learned to ski behind a 69 Mustang. I think cavitation is exactly what it was. I just wanted to ask because I had never heard the noise before on my previous inboard boats. (98 Supra and 02 Mastercraft) Not sure when the damper was changed. The previous owner didn't have a whole lot of useful info on the maintenance history of the boat. Other than that the boat flat out hauls a**! I love this thing! I feel like I'm driving an old hot-rod!

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Patrick


Posted By: 74Wind
Date Posted: August-02-2012 at 9:23pm
Originally posted by Patman79 Patman79 wrote:

Sorry Pete. I've only had the boat a month and a half or so and this weekend was the very first time I've had it on the water. I was waiting to put a new carb on before that. This is the first time I have been in an older Correct Craft since I was a about 8 or nine when I learned to ski behind a 69 Mustang. I think cavitation is exactly what it was. I just wanted to ask because I had never heard the noise before on my previous inboard boats. (98 Supra and 02 Mastercraft) Not sure when the damper was changed. The previous owner didn't have a whole lot of useful info on the maintenance history of the boat. Other than that the boat flat out hauls a**! I love this thing! I feel like I'm driving an old hot-rod!


Three cheers for a guy who goes back in time 20ish years from a 98 Supra and 02 Mastercraft to a 79 Correct Craft!

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1974 Southwind 18
1975 Century Mark II


Posted By: blink
Date Posted: December-20-2012 at 11:53pm
Pat Shelly's 82 makes the same noise and I believe it is coming from the tracking fins under the the boat in the middle If the noise is coming from close to your pole that's it. I think the fins create a harmonic vibration and it resonates up thru the hull

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BTW looks like I lost my 82-2001 to sanity


Posted By: HarveyJonathan
Date Posted: December-21-2012 at 3:33am
Resonance occurred if I am right. Sometimes when the boat is not build in tightened manner, it gives such noises and vibrates as well.
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