PDA

View Full Version : What is causing vibration? Help appreciated...


luke_bradshaw
04-09-2012, 01:38 PM
'07 X-45. Prop was bent, so changed it out recently. Vibration remains - what else would it be???

Double D
04-09-2012, 01:42 PM
'07 X-45. Prop was bent, so changed it out recently. Vibration remains - what else would it be???

Prop Shaft....??

jason95gt
04-09-2012, 01:48 PM
Strut, rudder?

CantRepeat
04-09-2012, 01:56 PM
I would say either the strut or shaft is now bent as well.

willyt
04-09-2012, 02:07 PM
Pretty good list above, perhaps it could use an engine alignment as well?

luke_bradshaw
04-09-2012, 03:25 PM
Thanks - can you guys give me ballpark estimates of what alignment and possible shaft replacement should cost so I can compare?

willyt
04-09-2012, 03:44 PM
alignment will run you about $150 - no parts, just mechanic time. If you're handy you can do this yourself
shaft will run $450 without labor
strut will run $400ish without labor (much more labor involved here - have to break the 3m 5200 seal
A quick test would be to turn the prop by hand. on a properly aligned (engine, strut and shaft) drivetrain you should be able to turn it with your pinky. Also may be stating the obvious here - are you 100% sure the 'new' prop is good?

MattsCraft
04-09-2012, 03:47 PM
alignment will run you about $150 - no parts, just mechanic time. If you're handy you can do this yourself
shaft will run $450 without labor
strut will run $400ish without labor (much more labor involved here - have to break the 3m 5200 seal
A quick test would be to turn the prop by hand. on a properly aligned (engine, strut and shaft) drivetrain you should be able to turn it with your pinky. Also may be stating the obvious here - are you 100% sure the 'new' prop is good?

Says the man with experience on shafts... :D2 way pun, I crack myself up...:rolleyes:

Double D
04-09-2012, 04:07 PM
Thanks - can you guys give me ballpark estimates of what alignment and possible shaft replacement should cost so I can compare?

I had my shaft inspected first before a replacement. It was within spec so I didn't need a new one. Dont remember the cost but it was a heck of a lot cheaper than new... Also, I believe it could have been straightened, but dont hold me to that one though...

mwg
04-09-2012, 04:47 PM
A quick test would be to turn the prop by hand. on a properly aligned (engine, strut and shaft) drivetrain you should be able to turn it with your pinky.

With your pinky? :confused: so if I can turn mine by hand (but not with my pinky) and there is no vibration, is there a problem? There has to be some resistance/friction in the system. I don't mean to ask a stupid question but I am new to inboards..

Thanks

willyt
04-09-2012, 04:54 PM
Says the man with experience on shafts... :D2 way pun, I crack myself up...:rolleyes:

Ah, but I dont sit on a LOG and preach about it :rolleyes: haha. I'z got jokes too

I'd say if you could turn it by hand and there wasn't any vibration you're fine. I have a pretty strong pinky anyway :insert joke I can't say here because this is a family site:

-V-
04-09-2012, 05:47 PM
alignment will run you about $150 - no parts, just mechanic time. If you're handy you can do this yourself
shaft will run $450 without labor
strut will run $400ish without labor (much more labor involved here - have to break the 3m 5200 seal
A quick test would be to turn the prop by hand. on a properly aligned (engine, strut and shaft) drivetrain you should be able to turn it with your pinky. Also may be stating the obvious here - are you 100% sure the 'new' prop is good?

So if I have to grab the prop and really give it a nudge, that is bad? Seriously, last summer I had to really give it some umph.

east tx skier
04-09-2012, 05:52 PM
Use a feeler gauge. I think runout should be within 0.002". Had to have this checked last year. We were just barely in tolerance.

Brian B
04-09-2012, 06:47 PM
Is there a thread on here describing how to align engines?

luke_bradshaw
04-10-2012, 12:50 PM
If there is just a slight vibration, is it okay to run it for a couple weekends (very lightly - no wakeboarding, skiing, etc) until I can get shaft replaced? i.e. is there a risk of causing further damage??

FrankSchwab
04-10-2012, 01:06 PM
Lots of threads on here about propshaft/engine alignment, but the best resource I've seen so far is the document here (http://mastercraft.com/teamtalk/showpost.php?p=827095&postcount=22).

Brian B
04-10-2012, 02:09 PM
Thanks Frank!

goebelt
05-14-2012, 01:10 AM
When you say turn with ur pinky that is just putting the boat in neutral and turning it. I have an x-45 06. New to me. It takes quite a bit of effort to turn it. Am I screwed? The boat also vibrates when I take off!