Roar from transmission area after hitting rock bar
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=36100
Printed Date: November-17-2024 at 5:57am
Topic: Roar from transmission area after hitting rock bar
Posted By: Lostinattica
Subject: Roar from transmission area after hitting rock bar
Date Posted: May-20-2015 at 4:17pm
| Can anyone help me diagnose this issue? I was running about 20 MPH and hit a rock bar in the middle of the river (go ahead and laugh). My nav went from 80' to 5' instantly and the boat came to a complete stop. I replaced my prop and straightened my fins but there is still vibration and a roar coming from trans flange area. I can not see any damage to the shaft inside or under the boat or to the strut when I turn it by hand. Can someone help with steps for process of elimination? Even if I could afford a boat mechanic, they're ALL 4 to 5 weeks behind in my area. |
Replies:
Posted By: Hollywood
Date Posted: May-20-2015 at 4:20pm
|
I can't see how you don't have a bent strut shaft and rudder. You need to take the shaft out and have it checked for straightness, then see if you can align it back from the strut through the log. The coupler must be tight too, if it comes out by hand you will need new. Sorry, but you've got lots more problems than you seem to think... ------------- |
Posted By: Lostinattica
Date Posted: May-20-2015 at 4:24pm
|
Yes the rudder is bent some but I only had minimal tightness in the steering when I drove it back to the ramp. So should I uncouple and pull the shaft out from the bottom? |
Posted By: JoeinNY
Date Posted: May-20-2015 at 4:37pm
|
Yep, what he said. Drop the rudder. Pull out the shaft… have someone put it on a set of v-blocks and check the runout, or do a little research on here or elsewhere as to how to do that. Take a good hard look at the strut while the rest of it is apart. Its possible you damaged the transmission but the underwater gear is damaged far more often. Damaging the transmission without bending the strut or the shaft would be unusual. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1477 - 1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" http://www.youtube.com/watch?v=cO5MkcBXBBs - Holeshot Video |
Posted By: Mountain Man
Date Posted: May-20-2015 at 4:51pm
| Sorry to hear about your accident with the rock. There are not many people that have operated boats for any length of time that have NOT hit a submerged object of some type. Couple of thoughts here - 1) do you have a dial indicator and know how to use it ? 2) do you have insurance - if so - this is a good time to file a claim and let a professional work on it. Potentially bent shafts / struts need precise measuring tools to evaluate - probably can't eyeball it unless it's really bad. You might also disconnect the shaft coupler at the transmission, crank the engine and engage the transmission to see / hear if the transmission make the same noise - if yes you know the roar is in the transmission. If no, that's good news and you can focus on the shaft and strut. |
Posted By: Lostinattica
Date Posted: May-20-2015 at 5:02pm
| Sounds like a good starting point. thanks. |
Posted By: desertskier
Date Posted: May-20-2015 at 5:13pm
| Run it on the trailer in gear and watch the shaft spin. If it's bent you will probably see it. Spray some water on the bushing to lubricate it. Don't ask how I know this. And as mentioned call your insurance if you need repairs. I got an ARE shaft, 4 blade prop, tunable rudder, steering cable, strut mount and bushing all for my $250 deductible. |
Posted By: Lostinattica
Date Posted: May-20-2015 at 5:20pm
| It's an '8 model so I only have liability insurance on it. Obviously a bad decision. Does the shaft come apart or in two at the bushing under my back seat? Or will my shaft be one continuous shaft from prop to trans??? |
Posted By: Lostinattica
Date Posted: May-20-2015 at 5:21pm
| It's an '86 model so I only have liability insurance on it. Obviously a bad decision. Does the shaft come apart or in two at the bushing under my back seat? Or will my shaft be one continuous shaft from prop to trans??? |
Posted By: Hollywood
Date Posted: May-20-2015 at 5:25pm
|
1 piece. a: drop the rudder b: press out of coupling (search how to do this) c: extract from bottom of boat ------------- |
Posted By: Mountain Man
Date Posted: May-20-2015 at 5:33pm
| The shaft coupler can be disconnected at the transmission if that is what you are asking. There are two flanges that face each other at the tail end of the transmission (one stays on the transmission and one on the shaft) - there are 4 bolts set 90 degrees apart. Remove the bolts and the two flanges can be separated. |
Posted By: Hollywood
Date Posted: May-20-2015 at 5:39pm
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let's see some pictures of this mess no fiberglass damage?? ------------- |
Posted By: Lostinattica
Date Posted: May-20-2015 at 6:47pm
| Why do you disconnect the rudder to remove the drive shaft? |
Posted By: 8122pbrainard
Date Posted: May-20-2015 at 7:17pm
NG, Wow, you eye's must be better than mine. I have to use a dial indicator to detect the allowed .003" run out!! ------------- /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 < |
desertskier wrote:Posted By: Lostinattica
Date Posted: May-20-2015 at 7:20pm
| This shaft is wobbling by hand from the top end. I but I don't know if it's bc the packing is bad or if it's bent. I can't press this shaft housing off so I think I might cut the shaft and just replace the housing too. Thoughts??? |
Posted By: 8122pbrainard
Date Posted: May-20-2015 at 7:28pm
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Ken, Chance are high that the shaft is bad. Along with that and going to the ARE system, cutting is a logical and certainly easier way of removal. The alternate is to use the "long bolt and spacer" trick. The procedure is linked in the FAQ thread. Don't forget the pictures!! ------------- /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: Lostinattica
Date Posted: May-20-2015 at 7:34pm
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Thanks I was hoping I was right. Ok it's a 54" shaft. Is there anywhere or any links anyone knows of to properly install the packing or bushing?? I will post pix and a video from my pc this evening. I can't do it from my phone for some reason. |
Posted By: 8122pbrainard
Date Posted: May-20-2015 at 7:40pm
Again, check the FAQ thread. ------------- /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: desertskier
Date Posted: May-20-2015 at 8:31pm
Not just my eyes! |