shaft rubbing on shaft log
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=27051
Printed Date: November-18-2024 at 9:34pm
Topic: shaft rubbing on shaft log
Posted By: YooperSully
Subject: shaft rubbing on shaft log
Date Posted: July-18-2012 at 3:22pm
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I'm looking for the correct procedure to align my shaft in the shaft log. My left to right seems o.k. but the shaft is resting on the lower lip of the shaft log. Is there a correct procedure to aligning the shaft and strut to the shaft log or is the shaft suppose to rest on it due to to weight of the shaft and the angle? To me it seems like the strut should be moved back in order to center it in the shaft log but I'm not sure. I watched the video on shaft alignment but he doesn't realy talk about getting it to center in the log with moving the strut forward or backward. ------------- 87' 2001 |
Replies:
Posted By: cphase
Date Posted: July-18-2012 at 3:31pm
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In the Video section at the top of the page. ------------- Thanks, Jeff http://www.correctcraftfan.com/diaries/details.asp?ID=6549" rel="nofollow - 82 SN http://www.archlinux.org" rel="nofollow - Arch Linux |
Posted By: Gary S
Date Posted: July-18-2012 at 3:35pm
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You cannot move the strut back or foward but in your case you would add washers between it and the hull at the rear two bolts. Pete I'm sure be here shortly to advise. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: 8122pbrainard
Date Posted: July-18-2012 at 3:41pm
This is correct that I don't mention moving the strut because I suggest some washers to shim the strut to center the shaft in the log. In your case a single SS flat washer under each of the aft strut mounting bolts should do it. Make sure it's not the engine pulling the front of the shaft down and it's actually a misaligned strut. When the shaft is centered in the log it needs to be "happy" (turn freely) in the cutlass bearing. I also suggest checking what is causing the condition. Did anything change in the shape of the hull when you did the stringers? ------------- /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 < |
YooperSully wrote:Posted By: YooperSully
Date Posted: July-18-2012 at 4:02pm
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Currently the engine is out of the boat. So the only thing pulling the shaft down is gravity at this time. I'm getting ready to drop the engine in and just wanted to make sure everything in correct before I do. The old stringer job that I ripped out had the main stringers to close to each other, so the engine couldn't be aligned properly, their was no room left or right to adjust the engine. ------------- 87' 2001 |
Posted By: TRBenj
Date Posted: July-18-2012 at 4:27pm
I understand what youre saying, but I would reword it: Everything is done relative to where the shaft turns freely (happy). You dont move the shaft so that its centered in the log- rather, if where the shaft is "happy" doesnt coincide with the center of the log, then you may need to move your strut so that it does. Same goes for the engine. You find the place where the shaft is happy and then find a way to support it (block it up so gravity doesnt pull it down) and then you align your engine to that point. ------------- |
Posted By: YooperSully
Date Posted: July-18-2012 at 5:52pm
 The top image is my shaft resting on the bottom of my log. I shimmed my rear strut holes and was able to center the shaft in the log. The only problem is the shaft is tight when turning. If I Raise my shaft to the top of the log the shaft spins more freely but needs my assistance to stay there. Should I leave the shaft centered or take out my shims so that the shaft turns more freely when at center of the log. The shaft and cutlass bearing are both new so we can take that out of the question. The second picture is of the shimmmed strut whith the shaft centered but a wee bit tight on the rotation. 1/2" gap between the prop and rear of the strut, right??? ------------- 87' 2001 |
Posted By: TRBenj
Date Posted: July-18-2012 at 5:54pm
Re-read my post above. The only thing that matters is where that shaft turns freely. THAT is the point that you reference everything to. ------------- |
Posted By: YooperSully
Date Posted: July-18-2012 at 5:54pm
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after the tenth time reading this, I get it. Get the shaft to spin freely, get it centered in the log still keeping it spinning freely, block it, set the motor to this location. ------------- 87' 2001 |
Posted By: 8122pbrainard
Date Posted: July-18-2012 at 6:19pm
Yes!  Alignment starts at the strut to the log and then the engine is set to that position.------------- /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: Big Pappa
Date Posted: July-19-2012 at 2:27pm
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When you do you engine alignment it will help to keep the stuffing box pulled up so you can watch the shaft as you do your alignment and keep it in the center of the log. I learned this the hard way after getting my engine aligned then checked the log to find out it was off from my sweet spot in the center of the log. Keeping the stuffing box pulled up and watching the log as I did my engine alignment made it much easier the second time to make sure everything ended up in the right place. ------------- http://bit.ly/Mghpvx" rel="nofollow - Big Pappa http://bit.ly/L4zRW0" rel="nofollow - My Project |
Posted By: watrski
Date Posted: July-19-2012 at 2:39pm
Your strut determines where it is in the log. |
Posted By: Big Pappa
Date Posted: July-19-2012 at 2:57pm
Yes, but the shaft can still move and "bind" your cutlass bearing causing it to wear faster. ------------- http://bit.ly/Mghpvx" rel="nofollow - Big Pappa http://bit.ly/L4zRW0" rel="nofollow - My Project |
Posted By: watrski
Date Posted: July-19-2012 at 3:12pm
Not sure what your trying to say but....OK. |
Posted By: Big Pappa
Date Posted: July-19-2012 at 3:18pm
Once you set your strut your shaft can still move 1/4" or so in all directions. That does not mean that it will spin freely in all that area. Knowing where the shaft spins freely in the log and making sure the shaft is in that location once the engine is aligned is what you want to make sure happens. ------------- http://bit.ly/Mghpvx" rel="nofollow - Big Pappa http://bit.ly/L4zRW0" rel="nofollow - My Project |
Posted By: 8122pbrainard
Date Posted: July-19-2012 at 3:27pm
Yes, the shaft doesn't need to be perfectly centered in the log and yes, it does need to be in a position where it turns freely when you match the engine up to it. ------------- /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 < |